ARMSTRONG WORLD INDUSTRIES INC
11-K, 1999-03-18
PLASTICS PRODUCTS, NEC
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<PAGE>
 
                                   FORM 11-K


                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D. C. 20549

(Mark One)

[X]  ANNUAL REPORT PURSUANT TO SECTION 15(D) OF THE SECURITIES
     EXCHANGE ACT OF 1934

For the fiscal year ended              September 30, 1998
                          ----------------------------------------------------

                                      OR
                                        

[_]  TRANSITION REPORT PURSUANT TO SECTION 15(D) OF THE SECURITIES
     EXCHANGE ACT OF 1934

For the transition period from ____________________ to _______________________

Commission file number                         1-2116
                       -------------------------------------------------------





                  RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                      OF ARMSTRONG WORLD INDUSTRIES, INC.
                           (Full title of the Plan)



                       ARMSTRONG WORLD INDUSTRIES, INC.
                             2500 Columbia Avenue
                        Lancaster, Pennsylvania  17604
              (Name of issuer of the securities held pursuant to
          the Plan and the address of its principal executive office)
<PAGE>
 
                                                                 Page No.
                                                                 ------- 


Item 1.  Statements of Net Assets                                    4
         ------------------------                                     
 
         September 30, 1998 and 1997


Item 2.  Statements of Changes in Plan Equity                       7-10
         ------------------------------------                           

         (a)  Year ended September 30, 1998
         (b)  Year ended September 30, 1997
         (c)  Year ended September 30, 1996



Notes to Financial Statements                                      11-16
- -----------------------------                                            

Item 3.  Independent Auditors' Report                               19
         ----------------------------                                 

Exhibits
- --------

23.  Consent of Independent Auditors
<PAGE>
 
                                   SIGNATURE


  Pursuant to the requirements of the Securities Exchange Act of 1934, the
members of the committee constituting the administrator which administers the
plan have duly caused this annual report to be signed by the undersigned
hereunto duly authorized.

 
                                RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN OF
                                ARMSTRONG WORLD INDUSTRIES, INC.
                                
                                
                                
March 18, 1999                  By: /s/ Douglas L. Boles
                                    ---------------------------------------
                                    Douglas L. Boles
                                    Vice - Chairman of the Retirement Committee 
 

<PAGE>
 
                THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                      OF ARMSTRONG WORLD INDUSTRIES, INC.
                           Statements of Net Assets
                          September 30, 1998 and 1997
<TABLE> 
<CAPTION> 
                                                                         1998
                                                                Retirement Savings Funds
                                    ----------------------------------------------------------------------------
                                        Commingled    Specialized    Low-Priced        Money       Fixed Income 
                                       Equity Fund    Equity Fund    Stock Fund     Market Fund        Fund     
                                       -----------    -----------    ----------     -----------        ----     
<S>                                    <C>            <C>            <C>            <C>            <C> 
Assets:
  Investments at fair value (note 4)   $ 54,298,768   $ 70,514,675   $    974,094   $  6,694,202   $133,791,698 
                                       ------------   ------------   ------------   ------------   ------------ 

  Cash and short-term investments                --             --             --             --             -- 

  Employer contributions receivable              --             --             --             --             -- 
  Interest receivable                            --             --             --             --             -- 
                                       ------------   ------------   ------------   ------------   ------------ 

Total assets                           $ 54,298,768   $ 70,514,675   $    974,094   $  6,694,202   $133,791,698 
                                       ------------   ------------   ------------   ------------   ------------ 

Liabilities:
  Guaranteed ESOP notes (note 6)                 --             --             --             --             -- 
  Due to/(from) other funds                      --             --             --      3,530,318             -- 
  Loans due plan sponsor (note 7)                --             --             --             --             -- 
  Accrued interest                               --             --             --             --             -- 
                                       ------------   ------------   ------------   ------------   ------------ 

Total liabilities                                --             --             --      3,530,318             -- 
                                       ------------   ------------   ------------   ------------   ------------ 


Plan equity                            $ 54,298,768   $ 70,514,675   $    974,094   $  3,163,884   $133,791,698 
                                       ============   ============   ============   ============   ============ 

<CAPTION> 
                                    
                                      -------------------------------------------------------------------------- 
                                       Global Equity     Armstrong      Overseas        "OTC"          Asset     
                                       Portfolio Fund   Stock Fund        Fund      Portfolio Fd.   Manager Fund 
                                       --------------   ----------        ----      -------------   ------------ 
<S>                                    <C>             <C>            <C>           <C>             <C> 
Assets:                                                                                                          
  Investments at fair value (note 4)    $  1,030,265   $ 10,340,697   $    342,931   $ 10,301,519   $  5,863,649 
                                        ------------   ------------   ------------   ------------   ------------ 
                                                                                                                 
  Cash and short-term investments                 --             --             --             --             -- 
                                                                                                                 
  Employer contributions receivable               --             --             --             --             -- 
  Interest receivable                             --             --             --             --             -- 
                                        ------------   ------------   ------------   ------------   ------------ 
                                                                                                                 
Total assets                            $  1,030,265   $ 10,340,697   $    342,931   $ 10,301,519   $  5,863,649 
                                        ------------   ------------   ------------   ------------   ------------ 
                                                                                                                 
Liabilities:                                                                                                     
  Guaranteed ESOP notes (note 6)                  --             --             --             --             -- 
  Due to/(from) other funds                       --             --             --             --             -- 
  Loans due plan sponsor (note 7)                 --             --             --             --             -- 
  Accrued interest                                --             --             --             --             -- 
                                        ------------   ------------   ------------   ------------   ------------ 
                                                                                                                 
Total liabilities                                 --             --             --             --             -- 
                                        ------------   ------------   ------------   ------------   ------------ 
                                                                                                                 
                                                                                                                 
Plan equity                             $  1,030,265   $ 10,340,697   $    342,931   $ 10,301,519   $  5,863,649 
                                        ============   ============   ============   ============   ============ 
</TABLE> 

The accompanying notes are an integral part of the financial statements.

                                                                     (Continued)
                                       4
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                            Statements of Net Assets

                                   1998, cont.

<TABLE> 
<CAPTION>                                                                                                                        
                                                                        Retirement Savings Funds                       
                                     --------------------------------------------------------------------------------  
                                         Asset Mgr.      Asset Mgr.    Mid Cap Value       Value            Loan       
                                        Income Fund     Growth Fund    Portfolio Fund  Portfolio Fund  Portfolio Fund  
                                        -----------     -----------    --------------  --------------  --------------  
<S>                                    <C>             <C>             <C>             <C>             <C> 
Assets:
  Investments at fair value (note 4)   $   3,062,879   $   9,250,957   $   1,979,431   $     494,143   $   5,025,880   
                                       -------------   -------------   -------------   -------------   -------------   

  Cash and short-term investments                 --              --              --              --              --   

  Employer contributions receivable               --              --              --              --              --   
  Interest receivable                             --              --              --              --              --   
                                       -------------   -------------   -------------   -------------   -------------   

Total assets                           $   3,062,879   $   9,250,957   $   1,979,431   $     494,143   $   5,025,880   
                                       -------------   -------------   -------------   -------------   -------------   

Liabilities:
  Guaranteed ESOP notes (note 6)                  --              --              --              --              --   
  Due to/(from) other funds                       --              --              --              --              --   
  Loans due plan sponsor (note 7)                 --              --              --              --              --   
  Accrued interest                                --              --              --              --              --   
                                       -------------   -------------   -------------   -------------   -------------   

Total liabilities                                 --              --              --              --              --   
                                       -------------   -------------   -------------   -------------   -------------   


Plan equity                            $   3,062,879   $   9,250,957   $   1,979,431   $     494,143   $   5,025,880   
                                       =============   =============   =============   =============   =============   

<CAPTION> 
                                                                        Stock Ownership Funds                           
                                                                 -------------------------------------                  
                                                         Allocated      Unallocated         Stock                       
                                         Retirement      Armstrong       Armstrong        Ownership                     
                                       Savings Total    Stock Fund       Stock Fund         Total          Plan Total   
                                       -------------    ----------       ----------         -----          ----------   
<S>                                    <C>             <C>              <C>              <C>              <C> 
Assets:                                                                                                                 
  Investments at fair value (note 4)   $ 313,965,788   $  97,351,544    $ 155,048,402    $ 252,399,946    $ 566,365,734 
                                       -------------   -------------    -------------    -------------    ------------- 
                                                                                                                        
  Cash and short-term investments                 --          97,491        1,400,098        1,497,589    $   1,497,589 
                                                                                                                        
  Employer contributions receivable               --              --        3,766,886        3,766,886        3,766,886 
  Interest receivable                             --             576            6,142            6,718            6,718 
                                       -------------   -------------    -------------    -------------    ------------- 
                                                                                                                        
Total assets                           $ 313,965,788   $  97,449,611    $ 160,221,528    $ 257,671,139    $ 571,636,927 
                                       -------------   -------------    -------------    -------------    ------------- 
                                                                                                                        
Liabilities:                                                                                                            
  Guaranteed ESOP notes (note 6)                  --              --      190,538,204      190,538,204      190,538,204 
  Due to/(from) other funds                3,530,318        (878,427)      (2,651,891)      (3,530,318)              -- 
  Loans due plan sponsor (note 7)                 --              --       14,971,603       14,971,603       14,971,603 
  Accrued interest                                --              --        4,851,306        4,851,306        4,851,306 
                                       -------------   -------------    -------------    -------------    ------------- 
                                                                                                                        
Total liabilities                          3,530,318        (878,427)     207,709,222      206,830,795      210,361,113 
                                       -------------   -------------    -------------    -------------    ------------- 
                                                                                                                        
                                                                                                                        
Plan equity                            $ 310,435,470   $  98,328,038    ($ 47,487,694)   $  50,840,344    $ 361,275,814 
                                       =============   =============    =============    =============    ============= 
</TABLE> 
                                       

The accompanying notes are an integral part of the financial statements.

                                                                     (Continued)
                                       5
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                            Statements of Net Assets

                                      1997
<TABLE> 
<CAPTION> 
                                                                           Retirement Savings Funds                                
                                     --------------------------------------------------------------------------------------------  
                                        Commingled    Specialized        Money      Fixed Income     Armstrong        "OTC"        
                                       Equity Fund    Equity Fund     Market Fund       Fund        Stock Fund    Portfolio Fd.    
                                       -----------    -----------     -----------       ----        ----------    -------------    
<S>                                    <C>            <C>            <C>            <C>            <C>            <C> 
Assets:
  Investments at fair value (note 4)   $ 49,670,121   $ 67,994,282   $  3,599,035   $131,000,677   $ 12,759,960   $ 11,271,195     
                                       ------------   ------------   ------------   ------------   ------------   ------------     

  Cash and short-term investments                --             --             --             --             --             --     

  Employee contributions receivable              --             --             --             --             --             --     
  Employer contributions receivable              --             --             --             --             --             --     
  Dividends receivable                           --             --             --             --             --             --     
  Interest receivable                            --             --             --             --             --             --     
                                       ------------   ------------   ------------   ------------   ------------   ------------     
                                                                                                                                   
Total assets                           $ 49,670,121   $ 67,994,282   $  3,599,035   $131,000,677   $ 12,759,960   $ 11,271,195     
                                       ------------   ------------   ------------   ------------   ------------   ------------     

Liabilities:
  Guaranteed ESOP notes (note 6)                 --             --             --             --             --             --     
  Loans due plan sponsor (note 7)                --             --             --             --             --             --     
  Accrued interest                               --             --             --             --             --             --     
                                       ------------   ------------   ------------   ------------   ------------   ------------     

Total liabilities                                --             --             --             --             --             --     
                                       ------------   ------------   ------------   ------------   ------------   ------------     

Plan equity                            $ 49,670,121   $ 67,994,282   $  3,599,035   $131,000,677   $ 12,759,960   $ 11,271,195     
                                       ============   ============   ============   ============   ============   ============     

<CAPTION> 
                                                       Retirement Savings Funds 
                                       --------------------------------------------------------- 
                                           Asset      Asset Mgr.     Asset Mgr.        Loan      
                                       Manager Fund   Income Fund    Growth Fund  Portfolio Fund 
                                       ------------   -----------    -----------  -------------- 
<S>                                    <C>            <C>            <C>            <C> 
Assets:                                                                                          
  Investments at fair value (note 4)   $  5,482,241   $  1,845,575   $  8,693,409   $  4,573,178 
                                       ------------   ------------   ------------   ------------ 

  Cash and short-term investments                --             --             --             -- 
                                                                                                 
  Employee contributions receivable              --             --             --             -- 
  Employer contributions receivable              --             --             --             -- 
  Dividends receivable                           --             --             --             -- 
  Interest receivable                            --             --             --             -- 
                                       ------------   ------------   ------------   ------------ 
                                                                                                 
Total assets                           $  5,482,241   $  1,845,575   $  8,693,409   $  4,573,178 
                                       ------------   ------------   ------------   ------------ 
                                                                                                 
Liabilities:                                                                                     
  Guaranteed ESOP notes (note 6)                 --             --             --             -- 
  Loans due plan sponsor (note 7)                --             --             --             -- 
  Accrued interest                               --             --             --             -- 
                                       ------------   ------------   ------------   ------------ 
                                                                                                 
Total liabilities                                --             --             --             -- 
                                       ------------   ------------   ------------   ------------ 
                                                                                                 
Plan equity                            $  5,482,241   $  1,845,575   $  8,693,409   $  4,573,178 
                                       ============   ============   ============   ============ 
                                       
<CAPTION> 
                                                                Stock Ownership Funds                           
                                                       ------------------------------------                     
                                                        Allocated    Unallocated       Stock                    
                                        Retirement      Armstrong     Armstrong      Ownership                  
                                       Savings Total   Stock Fund    Stock Fund        Total        Plan Total  
                                       -------------   ----------    ----------        -----        ----------  
<S>                                    <C>            <C>            <C>            <C>            <C> 
Assets:                                                                                                         
  Investments at fair value (note 4)   $296,889,673   $109,573,363   $215,901,751   $325,475,114   $622,364,787 
                                       ------------   ------------   ------------   ------------   ------------ 
                                                                                                                
  Cash and short-term investments                --         92,240      1,426,130      1,518,370   $  1,518,370 
                                                                                                                
  Employee contributions receivable              --             --      2,593,899      2,593,899      2,593,899 
  Employer contributions receivable              --             --      4,007,971      4,007,971      4,007,971 
  Dividends receivable                           --        724,601             --        724,601        724,601 
  Interest receivable                            --            424          6,112          6,536          6,536 
                                       ------------   ------------   ------------   ------------   ------------ 

Total assets                           $296,889,673    110,390,628    223,935,863    334,326,491   $631,216,164 
                                       ------------   ------------   ------------   ------------   ------------ 
                                                                                                                
Liabilities:                                                                                                    
  Guaranteed ESOP notes (note 6)                 --             --    212,027,803    212,027,803    212,027,803 
  Loans due plan sponsor (note 7)                --             --      5,768,849      5,768,849      5,768,849 
  Accrued interest                               --             --      5,413,818      5,413,818      5,413,818 
                                       ------------   ------------   ------------   ------------   ------------ 
                                                                                                                
Total liabilities                                --             --    223,210,470    223,210,470    223,210,470 
                                       ------------   ------------   ------------   ------------   ------------ 
                                                                                                                
Plan equity                            $296,889,673   $110,390,628   $    725,393    111,116,021   $408,005,694 
                                       ============   ============   ============   ============   ============ 
</TABLE> 
                                       

The accompanying notes are an integral part of the financial statements.

                                       6
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                      Statements of Changes in Plan Equity
                  Years Ended September 30, 1998, 1997 and 1996

                                      1998
<TABLE> 
<CAPTION> 
                                                                            Retirement Savings Funds
                                    ---------------------------------------------------------------------------------
                                     Commingled       Specialized      Low-Priced          Money        Fixed Income    
                                     Equity Fund      Equity Fund      Stock Fund       Market Fund         Fund        
                                     -----------      -----------      ----------       -----------         ----        
<S>                                 <C>              <C>              <C>              <C>              <C> 
Plan equity at October 1, 1997      $  49,670,121    $  67,994,282    $          --    $   3,599,035    $ 131,000,677   
                                    -------------    -------------    -------------    -------------    -------------   

Increases in plan equity:
  Employee contributions                1,781,261        2,876,825           34,741          151,728        4,691,190   
  Employer contributions (note 5)              --               --               --               --               --   
  Dividends                             1,512,438        4,917,540           69,227          160,014               --   
  Interest                                 53,332          113,382            1,161           11,092        8,387,160   

  Realized gain on investments
    (note 4)                            2,348,060        2,099,843           (4,726)              --               --   
  Loan activity, net                     (108,394)        (225,496)           2,011          (59,585)        (289,184)  
                                    -------------    -------------    -------------    -------------    -------------   

                                        5,586,697        9,782,094          102,414          263,249       12,789,166   
                                    -------------    -------------    -------------    -------------    -------------   

Decreases in plan equity:
  Unrealized appreciation
    (depreciation) of investments         506,298       (3,735,515)        (252,360)              --               --   
  Interest expense (note 6)                    --               --               --               --               --   
  Benefits paid (note 8)               (1,979,685)      (3,109,811)         (38,706)        (529,778)      (9,405,402)  
  Transfers (to) from other
    employee benefit plans                (63,821)         (78,298)              --          102,676          (88,920)  
  Interfund transfers, net                579,158         (338,077)       1,162,746         (271,298)        (503,823)  
                                    -------------    -------------    -------------    -------------    -------------   

                                         (958,050)      (7,261,701)         871,680         (698,400)      (9,998,145)  
                                    -------------    -------------    -------------    -------------    -------------   


Plan equity at September 30,1998    $  54,298,768    $  70,514,675    $     974,094    $   3,163,884    $ 133,791,698   
                                    =============    =============    =============    =============    =============   

<CAPTION> 
                                                                   Retirement Savings Funds
                                    ----------------------------------------------------------------------------------  
                                     Global Equity      Armstrong         Overseas          "OTC"           Asset       
                                     Portfolio Fund     Stock Fund          Fund        Portfolio Fd.    Manager Fund   
                                     --------------     ----------          ----        -------------    ------------   
<S>                                  <C>                <C>            <C>              <C>              <C> 
Plan equity at October 1, 1997       $          --    $  12,759,960    $          --    $  11,271,195    $   5,482,241  
                                     -------------    -------------    -------------    -------------    -------------  
                                                                                                                        
Increases in plan equity:                                                                                               
  Employee contributions                    59,023          301,195           54,590          798,973          356,571  
  Employer contributions (note 5)               --               --               --               --               --  
  Dividends                                  9,986          336,481               --        1,114,299          540,381  
  Interest                                   1,160           25,667               42           30,611           12,278  
                                                                                                                        
  Realized gain on investments                                                                                          
    (note 4)                                (7,267)         896,302             (430)         429,228          161,338  
  Loan activity, net                         7,315         (125,026)          (1,998)          60,910            3,818  
                                     -------------    -------------    -------------    -------------    -------------  
                                                                                                                        
                                            70,217        1,434,619           52,204        2,434,021        1,074,386  
                                     -------------    -------------    -------------    -------------    -------------  
                                                                                                                        
Decreases in plan equity:                                                                                               
  Unrealized appreciation                                                                                               
    (depreciation) of investments         (186,389)      (3,059,684)         (67,266)      (1,781,970)        (385,777) 
  Interest expense (note 6)                     --               --               --               --               --  
  Benefits paid (note 8)                   (32,902)        (532,048)         (32,806)        (569,531)        (375,092) 
  Transfers (to) from other                                                                                             
    employee benefit plans                      --           14,601               --           (4,183)           3,960  
  Interfund transfers, net               1,179,339         (276,751)         390,799       (1,048,013)          63,931  
                                     -------------    -------------    -------------    -------------    -------------  
                                                                                                                        
                                           960,048       (3,853,882)         290,727       (3,403,697)        (692,978) 
                                     -------------    -------------    -------------    -------------    -------------  
                                                                                                                        
                                                                                                                        
Plan equity at September 30,1998     $   1,030,265    $  10,340,697    $     342,931    $  10,301,519    $   5,863,649  
                                     =============    =============    =============    =============    =============  
</TABLE> 
                                   
The accompanying notes are an integral part of the financial statements.

                                                                     (Conitnued)
                                       7

<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                      Statements of Changes in Plan Equity

                                   1998, cont.
<TABLE> 
<CAPTION> 
                                                                    Retirement Savings Funds
                                    ------------------------------------------------------------------------------------------------
                                     Asset Mgr.      Asset Mgr.     Mid Cap Value        Value             Loan         Retirement  
                                     Income Fund    Growth Fund     Portfolio Fund   Portfolio Fund   Portfolio Fund  Savings Total 
                                     -----------    -----------     --------------   --------------   --------------  ------------- 
<S>                                 <C>             <C>             <C>              <C>              <C>             <C> 
Plan equity at October 1, 1997      $   1,845,575   $   8,693,409             $--              $--    $   4,573,178   $ 296,889,673 
                                    -------------   -------------   -------------    -------------    -------------   ------------- 

Increases in plan equity:
  Employee contributions                  102,569         741,991         102,445           34,784               --      12,087,886 
  Employer contributions (note 5)              --              --              --               --               --              -- 
  Dividends                               157,492         948,499              --            3,023               --       9,769,380 
  Interest                                  2,140          16,402           3,086              600               --       8,658,113 

  Realized gain on investments
    (note 4)                               20,399         254,594          (9,309)          (2,660)              --       6,185,372 
  Loan activity, net                       (3,455)         14,855           8,317            3,810          712,102              -- 
                                    -------------   -------------   -------------    -------------    -------------   ------------- 

                                          279,145       1,976,341         104,539           39,557          712,102      36,700,751 
                                    -------------   -------------   -------------    -------------    -------------   ------------- 


Decreases in plan equity:
  Unrealized appreciation
    (depreciation) of investments          (1,976)       (756,694)       (369,575)        (139,299)              --     (10,230,207)
  Interest expense (note 6)                    --              --              --               --               --              -- 
  Benefits paid (note 8)                 (158,100)       (261,976)        (58,230)         (32,243)              --     (17,116,310)
  Transfers (to) from other
    employee benefit plans                     --        (158,057)             --               --         (259,400)       (531,442)
  Interfund transfers, net              1,098,235        (242,066)      2,302,697          626,128               --       4,723,005 
                                    -------------   -------------   -------------    -------------    -------------   ------------- 

                                          938,159      (1,418,793)      1,874,892          454,586         (259,400)    (23,154,954)
                                    -------------   -------------   -------------    -------------    -------------   ------------- 


Plan equity at September 30,1998    $   3,062,879   $   9,250,957   $   1,979,431    $     494,143    $   5,025,880   $ 310,435,470 
                                    =============   =============   =============    =============    =============   ============= 

<CAPTION> 
                                        Stock Ownership Funds                                         
                                     -----------------------------                                    
                                     Allocated       Unallocated         Stock                        
                                     Armstrong        Armstrong        Ownership                      
                                     Stock Fund      Stock Fund          Total           Plan Total   
                                     ----------      ----------          -----           ----------   
<S>                                 <C>              <C>              <C>              <C> 
Plan equity at October 1, 1997      $ 110,390,628    $     725,393    $ 111,116,021    $ 408,005,694  
                                    -------------    -------------    -------------    -------------  
                                                                                                      
Increases in plan equity:                                                                             
  Employee contributions                       --        9,707,517        9,707,517       21,795,403  
  Employer contributions (note 5)              --       11,562,987       11,562,987       11,562,987  
  Dividends                             3,326,468        5,617,353        8,943,821       18,713,201  
  Interest                                  5,290          129,561          134,851        8,792,964  
                                                                                                      
  Realized gain on investments                                                                        
    (note 4)                              (62,604)              --          (62,604)       6,122,768  
  Loan activity, net                           --               --               --               --  
                                    -------------    -------------    -------------    -------------  
                                                                                                      
                                        3,269,154       27,017,418       30,286,572       66,987,323  
                                    -------------    -------------    -------------    -------------  
                                                                                                      
                                                                                                      
Decreases in plan equity:                                                                             
  Unrealized appreciation                                                                             
    (depreciation) of investments     (24,615,461)     (36,286,100)     (60,901,561)     (71,131,768) 
  Interest expense (note 6)                    --      (17,398,000)     (17,398,000)     (17,398,000) 
  Benefits paid (note 8)               (7,539,683)              --       (7,539,683)     (24,655,993) 
  Transfers (to) from other                                                                           
    employee benefit plans                     --               --               --         (531,442) 
  Interfund transfers, net             16,823,400      (21,546,405)      (4,723,005)              --  
                                    -------------    -------------    -------------    -------------  
                                                                                                      
                                      (15,331,744)     (75,230,505)     (90,562,249)    (113,717,203) 
                                    -------------    -------------    -------------    -------------  
                                                                                                      
                                                                                                      
Plan equity at September 30,1998    $  98,328,038    ($ 47,487,694)   $  50,840,344    $ 361,275,814  
                                    =============    =============    =============    =============  
</TABLE> 


The accompanying notes are an integral part of the financial statements. 

                                                                     (Continued)
                                       8
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                      Statements of Changes in Plan Equity

                                      1997
<TABLE> 
<CAPTION> 
                                                                                      Retirement Savings Funds                      
                                       -------------------------------------------------------------------------------------------- 
                                         Commingled   Specialized         Money        Fixed Income    Armstrong          "OTC"     
                                        Equity Fund   Equity Fund      Market Fund         Fund        Stock Fund     Portfolio Fd. 
                                        -----------   -----------      -----------         ----        ----------     ------------- 
<S>                                    <C>            <C>             <C>             <C>             <C>             <C> 
Plan equity at October 1, 1996         $  34,640,234  $  55,239,099   $   3,050,434   $ 126,067,031   $  13,508,146   $   6,856,784 
                                       -------------  -------------   -------------   -------------   -------------   ------------- 

Increases in plan equity:
  Transfer of assets from
     merged plan (note 2)                         --             --              --              --              --              -- 
  Employee contributions                   1,448,633      2,422,402         185,041       4,839,630         309,034         830,339 
  Employer contributions (note 5)                 --             --              --              --              --              -- 
  Dividends                                1,099,609      1,906,723         174,661              --         337,876         669,044 
  Interest                                    42,834         80,789           9,512       8,241,884          11,661          23,517 

  Realized gain on investments
    (note 4)                               2,279,419      1,875,833              --              --       1,001,249         294,692 
  Unrealized appreciation of
    investments                           10,806,762     14,653,771              --              --          75,036       1,676,576 
  Loan activity, net                        (320,312)      (301,064)        (10,006)       (438,400)        (79,611)        (44,168)
                                       -------------  -------------   -------------   -------------   -------------   ------------- 

                                          15,356,945     20,638,454         359,208      12,643,114       1,655,245       3,450,000 
                                       -------------  -------------   -------------   -------------   -------------   ------------- 


Decreases in plan equity:
  Interest expense (note 6)                       --             --              --              --              --              -- 
  Benefits paid (note 8)                  (3,254,255)    (3,933,969)       (948,749)    (13,298,177)       (837,570)       (927,481)
  Transfers (to) from other
    employee benefit plans of
    Armstrong World Industries, Inc.         172,815        189,824          37,313         561,763          16,068           6,529 
  Interfund transfers, net                 2,754,382     (4,139,126)      1,100,829       5,026,946      (1,581,929)      1,885,363 
                                       -------------  -------------   -------------   -------------   -------------   ------------- 

                                            (327,058)    (7,883,271)        189,393      (7,709,468)     (2,403,431)        964,411 
                                       -------------  -------------   -------------   -------------   -------------   ------------- 

Plan equity at September 30,1997       $  49,670,121  $  67,994,282   $   3,599,035   $ 131,000,677   $  12,759,960   $  11,271,195 
                                       =============  =============   =============   =============   =============   ============= 
<CAPTION> 
                                       -------------------------------------------------------------------------------  
                                          Asset          Asset Mgr.       Asset Mgr.          Loan         Retirement   
                                       Manager Fund     Income Fund     Growth Fund     Portfolio Fund   Savings Total  
                                       ------------     -----------     -----------     --------------   -------------  
<S>                                    <C>             <C>              <C>             <C>              <C> 
Plan equity at October 1, 1996         $   4,441,622   $   2,013,481    $   6,417,103   $   3,307,686    $ 255,541,620  
                                       -------------   -------------    -------------   -------------    -------------  
                                                                                                                        
Increases in plan equity:                                                                                               
  Transfer of assets from                                                                                               
     merged plan (note 2)                         --              --               --              --               --  
  Employee contributions                     354,321          75,979          550,098              --       11,015,477  
  Employer contributions (note 5)                 --              --               --              --               --  
  Dividends                                  381,885         138,153          564,099              --        5,272,050  
  Interest                                     8,241           1,758           12,728              --        8,432,924  
                                                                                                                        
  Realized gain on investments                                                                                          
    (note 4)                                 139,267          39,003          328,508              --        5,957,971  
  Unrealized appreciation of                                                                                            
    investments                              554,573          64,323        1,173,789              --       29,004,830  
  Loan activity, net                         (60,049)        (53,541)         (49,297)      1,356,448               --  
                                       -------------   -------------    -------------   -------------    -------------  
                                                                                                                        
                                           1,378,238         265,675        2,579,925       1,356,448       59,683,252  
                                       -------------   -------------    -------------   -------------    -------------  
                                                                                                                        
                                                                                                                        
Decreases in plan equity:                                                                                               
  Interest expense (note 6)                       --              --               --              --               --  
  Benefits paid (note 8)                    (609,366)       (378,699)        (671,143)             --      (24,859,409) 
  Transfers (to) from other                                                                                             
    employee benefit plans of                                                                                           
    Armstrong World Industries, Inc.          99,141              --          (29,795)        (90,956)         962,702  
  Interfund transfers, net                   172,606         (54,882)         397,319              --        5,561,508  
                                       -------------   -------------    -------------   -------------    -------------  
                                                                                                                        
                                            (337,619)       (433,581)        (303,619)        (90,956)     (18,335,199) 
                                       -------------   -------------    -------------   -------------    -------------  
                                                                                                                        
Plan equity at September 30,1997       $   5,482,241   $   1,845,575    $   8,693,409   $   4,573,178    $ 296,889,673  
                                       =============   =============    =============   =============    =============  
<CAPTION>                                        
                                               Stock Ownership Funds                                      
                                            -----------------------------                                 
                                         Allocated      Unallocated         Stock                         
                                         Armstrong       Armstrong        Ownership                       
                                        Stock Fund       Stock Fund         Total          Plan Total     
                                        ----------       ----------         -----          ----------     
<S>                                    <C>              <C>              <C>              <C> 
Plan equity at October 1, 1996                                                                            
                                       $          --    $          --    $          --    $ 255,541,620   
                                       -------------    -------------    -------------    -------------   
Increases in plan equity:                                                                                 
  Transfer of assets from                                                                                 
     merged plan (note 2)                                                                                 
  Employee contributions                  95,463,444       (7,571,201)      87,892,243       87,892,243   
  Employer contributions (note 5)                 --       10,658,241       10,658,241       21,673,718   
  Dividends                                       --       14,284,664       14,284,664       14,284,664   
  Interest                                 2,617,192        5,695,451        8,312,643       13,584,693   
                                              15,837          103,014          118,851        8,551,775   
  Realized gain on investments                                                                            
    (note 4)                                                                                              
  Unrealized appreciation of                      --               --               --        5,957,971   
    investments                                                                                           
  Loan activity, net                       7,651,796       15,092,486       22,744,282       51,749,112   
                                                  --               --               --               --   
                                       -------------    -------------    -------------    -------------   
                                                                                                          
                                         105,748,269       38,262,655      144,010,924      203,694,176   
                                       -------------    -------------    -------------    -------------   
                                                                                                          
Decreases in plan equity:                                                                                 
  Interest expense (note 6)                                                                               
  Benefits paid (note 8)                          --      (19,099,238)     (19,099,238)     (19,099,238)  
  Transfers (to) from other               (7,165,115)              --       (7,165,115)     (32,024,524)  
    employee benefit plans of                                                                             
    Armstrong World Industries, Inc.                                                                      
  Interfund transfers, net                    20,615       (1,089,657)      (1,069,042)        (106,340)  
                                          11,786,859      (17,348,367)      (5,561,508)              --   
                                       -------------    -------------    -------------    -------------   
                                                                                                          
                                           4,642,359      (37,537,262)     (32,894,903)     (51,230,102)  
                                       -------------    -------------    -------------    -------------   
Plan equity at September 30,1997                                                                          
                                       $ 110,390,628    $     725,393    $ 111,116,021    $ 408,005,694   
                                       =============    =============    =============    =============   
</TABLE> 
                                       

The accompanying notes are an integral part of the financial statements.

                                                                     (Continued)
                                       9
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                 Statements of Changes in Plan Equity, Continued


                                      1996

<TABLE> 
<CAPTION> 
                                      Commingled       Specialized        Money       Fixed Income       Armstrong        "OTC"     
                                      Equity Fund      Equity Fund     Market Fund        Fund          Stock Fund    Portfolio Fd. 
                                      -----------      -----------     -----------        ----          ----------    ------------- 
<S>                                   <C>             <C>             <C>             <C>             <C>             <C> 
Plan equity at October 1, 1995        $  26,008,895   $  53,822,126   $   2,863,787   $ 119,173,404   $   9,957,012   $   3,998,454 
                                      -------------   -------------   -------------   -------------   -------------   ------------- 

Increases in plan equity:
  Employee contributions                  1,304,166       3,271,882       3,249,141       3,759,748         263,346         592,828 
  Dividends                                 824,216      10,899,654         150,409              --         274,227         676,518 
  Interest                                   30,962          73,870           5,326       7,376,774           9,598           9,354 

  Realized gain on investments
    (note 4)                              1,356,135       1,682,172              --              --         598,743         173,665 
  Transfers (to) from other
    employee benefit plans (note 3)         917,764        (486,370)     (2,722,959)      5,740,701       2,510,969          54,286 
  Loan activity, net                       (127,242)          9,945         (51,300)        199,025          30,537          30,924 
                                      -------------   -------------   -------------   -------------   -------------   ------------- 

                                          4,306,001      15,451,153         630,617      17,076,248       3,687,420       1,537,575 
                                      -------------   -------------   -------------   -------------   -------------   ------------- 



Decreases in plan equity:
  Unrealized appreciation
    (depreciation) of investments         3,201,122     (10,982,140)             --              --         733,682          49,322 
  Benefits paid (note 8)                 (1,417,320)     (2,135,340)       (305,283)     (7,011,691)       (569,160)       (178,186)
  Interfund transfers, net                2,541,536        (916,700)       (138,687)     (3,170,930)       (300,808)      1,449,619 
                                      -------------   -------------   -------------   -------------   -------------   ------------- 

                                          4,325,338     (14,034,180)       (443,970)    (10,182,621)       (136,286)      1,320,755 
                                      -------------   -------------   -------------   -------------   -------------   ------------- 


Plan equity at September 30, 1996     $  34,640,234   $  55,239,099   $   3,050,434   $ 126,067,031   $  13,508,146   $   6,856,784 
                                      =============   =============   =============   =============   =============   ============= 
<CAPTION> 
                                           Asset        Asset Mgr.        Asset Mgr.         Loan                        
                                       Manager Fund     Income Fund      Growth Fund    Portfolio Fund      Total        
                                       ------------     -----------      -----------    --------------      -----        
<S>                                   <C>              <C>              <C>             <C>               <C> 
Plan equity at October 1, 1995        $   4,171,934    $   1,465,384    $   5,380,158    $   3,408,962    $ 230,250,116  
                                      -------------    -------------    -------------    -------------    -------------  
                                                                                                                         
Increases in plan equity:                                                                                                
  Employee contributions                    294,053           69,892          517,010               --       13,322,066  
  Dividends                                 149,553           92,269           77,215               --       13,144,061  
  Interest                                    6,424            3,161            8,596               --        7,524,065  
                                                                                                                         
  Realized gain on investments                                                                                           
    (note 4)                                 84,274           17,013          141,202               --        4,053,204  
  Transfers (to) from other                                                                                              
    employee benefit plans (note 3)          41,971          256,953         (272,357)         (21,076)       6,019,882  
  Loan activity, net                         (4,895)          11,757          (18,551)         (80,200)              --  
                                      -------------    -------------    -------------    -------------    -------------  
                                                                                                                         
                                            571,380          451,045          453,115         (101,276)      44,063,278  
                                      -------------    -------------    -------------    -------------    -------------  
                                                                                                                         
                                                                                                                         
                                                                                                                         
Decreases in plan equity:                                                                                                
  Unrealized appreciation                                                                                                
    (depreciation) of investments           188,800           11,409          457,253               --       (6,340,552) 
  Benefits paid (note 8)                   (464,192)        (170,707)        (179,343)              --      (12,431,222) 
  Interfund transfers, net                  (26,300)         256,350          305,920               --               --  
                                      -------------    -------------    -------------    -------------    -------------  
                                                                                                                         
                                           (301,692)          97,052          583,830               --      (18,771,774) 
                                      -------------    -------------    -------------    -------------    -------------  
                                                                                                                         
                                                                                                                         
Plan equity at September 30, 1996     $   4,441,622    $   2,013,481    $   6,417,103    $   3,307,686    $ 255,541,620  
                                      =============    =============    =============    =============    =============  
</TABLE> 


The accompanying notes are an integral part of the financial statements.

                                      10
<PAGE>
 
                THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                      OF ARMSTRONG WORLD INDUSTRIES, INC.
                         Notes to Financial Statements

(1)  Summary of Significant Accounting Policies

     (a) Basis of Presentation
         ---------------------
         The accompanying financial statements have been prepared on the accrual
basis.

         The preparation of financial statements in conformity with generally
         accepted accounting principles requires management to make estimates
         and assumptions that affect the reported amounts of assets and
         liabilities and disclosure of contingent assets and liabilities at the
         date of the financial statements and the reported amounts of revenues
         and expenses during the reporting period. Actual results could differ
         from estimates recorded.

     (b) Investments in Master Trust
         --------------------------- 
         The fair value of the commingled equity, specialized equity, low-priced
         stock, global equity portfolio, overseas, "OTC" portfolio, Asset
         Manager, Asset Manager income, Asset Manager growth, mid cap value
         portfolio and value portfolio is based on the underlying market value
         of the investments. The money market fund is stated at cost which
         approximates fair value. The fixed income fund is comprised of
         guaranteed interest rate contracts which are fully benefit responsive,
         and therefore are reflected at contract value plus credited interest in
         the financial statements. The value of the Armstrong stock fund is
         based on quoted market price. The value of the loan portfolio fund
         represents the unpaid principal of employee loans.

         Securities transactions are recognized on the settlement date (the date
         on which payment for a buy or sell order is made or received), since
         adjustment to a trade-date basis would not be material. Dividend income
         is recorded on the ex-dividend date.

         Realized gains and losses on investments are determined by the average
         cost method.

         Stock Ownership Funds
         --------------------- 
         Investments in the Stock Ownership Funds represent shares of Armstrong
         common stock valued at quoted market price.

     (c) Expenses 
         --------
         All legal, accounting and administrative expenses associated with Plan
         operations are paid by Armstrong World Industries, Inc. (the Company)

(2)  Plan Redesign
     -------------
     On May 29, 1996, the Board of Directors of the Company approved the
     restructuring of the Armstrong World Industries, Inc., Employee Stock
     Ownership Plan (ESOP). The ESOP was merged into the Retirement Savings Plan
     for Salaried Employees of Armstrong World Industries, Inc. (Salaried RSP).
     In addition, the Salaried RSP was renamed the Retirement Savings and Stock
     Ownership Plan of Armstrong World Industries, Inc. (the Plan). The
     effective date of the merger was October 1, 1996. In addition, a portion of
     the assets and liabilities of the Retirement Savings Plan for Hourly-Paid
     Employees of Armstrong World Industries, Inc. were transferred to the Plan
     for hourly employees not represented by a collective bargaining agent and
     for Mobile Plant hourly employees represented by a collective bargaining
     agent, effective October 1, 1996.

(3)  Plan Description
     ----------------
     The Plan is a defined-contribution plan established for the purpose of
     providing participants with a means for long-term savings intended for the
     accumulation of retirement income in addition to that provided under other
     retirement plans maintained for the benefit of employees. The Plan is
     comprised of two parts--Retirement Savings and Stock Ownership. Each part
     has its own set of participant accounts and investment funds.

     (a) Retirement Savings
         ------------------
         The Retirement Savings Accounts allow participants to make
         contributions to the Plan in each of the following methods:

         1.  Up to 15% of their before-tax compensation, as deferred
             compensation as permitted under Section 401(k) of the Internal
             Revenue Code.

         2.  Up to 10% of their after-tax compensation.

                                      11
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                   Notes to Financial Statements, (Continued)

         Separate accounts are maintained for contributions made by or on behalf
         of a participant. The accounts reflect the participants' contributions
         together with dividends, interest, other income, and realized and
         unrealized gains and losses allocated thereon. Participants have an
         immediate 100 percent vested interest with respect to their
         contributions and are fully vested with regard to any previously made
         matching company contributions.

         Plan participants did include salaried employees of Thomasville
         Furniture Industries, Inc. On December 29, 1995, Armstrong World
         Industries, Inc., sold Thomasville Furniture to Interco Incorporated.
         The agreement of sale required Interco to establish a savings plan for
         Thomasville employees comparable to those it maintains for its other
         employees. Interco's successor plan became effective as of April 1,
         1996. The salaried Thomasville participants of the Plan were allowed to
         make contributions to the Plan through March 31, 1996, at which time
         their account balances were transferred to the Interco plan. The
         following table presents the transfers made by investment type:

                    Commingled equity                 $1,694,425
                    Specialized equity                 4,219,230
                    Money market                       2,944,518
                    Fixed income                       6,658,481
                    OTC portfolio                        455,336
                    Asset manager                        308,114
                    Asset manager income                 136,902
                    Asset manager growth                 601,858
                                                   -------------
                                                     $17,018,864
                                                   =============

         In 1996, there was also a transfer into the Plan in the amount of
         $19,621,290 from the Retirement Savings Plan for Hourly-Paid Employees
         of Armstrong World Industries, Inc. This transfer represents the
         inclusion in the Plan of participant account balances for all hourly
         employees eligible for participation in the Company's Employee Stock
         Ownership Plan. Finally in 1996, the Plan had funds transferred in from
         the American Olean Salaried Retirement Savings Plan of $3,417,456.

     (b) Stock Ownership
         --------------- 
         The Plan has three Stock Ownership Accounts maintained for each member
         for contributions and allocations of shares of Company common stock
         from the Unallocated Armstrong Common Stock Fund.

         Participants who elect to reduce their before-tax compensation in
         amounts ranging from one percent to six percent have these
         contributions credited to an Exchange Account. Contributions to the
         Exchange Account are invested in Company common stock. The Plan matches
         a portion of the contributions made to the Exchange Account with
         additional shares of Company common stock. The matching amounts are
         recorded in participants' Match Accounts. The match percentage, either
         50% or 75%, is determined by the closing stock price on the last day of
         the allocation period. For allocation periods ended in December of
         1996, June of 1997, and December of 1997, a 75% fixed match was in
         place on employee Exchange Account contributions. For the allocation
         period ended in June of 1998, there was a 50% fixed match on employee
         Exchange Account contributions.

         Eligible participants also receive shares of Company common stock in
         their Equity Account. The Equity Account is intended to provide a
         source of funds to replace certain retiree medical benefits which were
         phased out in conjunction with the adoption of the ESOP.

         Participants have an immediate 100 percent vested interest in the full
         value of their Exchange Account. Interest in the Equity and Match
         Accounts vest after five years of service.

                                      12
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                   Notes to Financial Statements, (Continued)

(4)  Investments
     -----------

     (a) Retirement Savings Funds
         ------------------------
         Assets are held in a Master Trust administered by Fidelity Management
         Trust Co., as Trustee, and are segregated into fourteen investment
         options: a commingled equity mutual fund (Fidelity U.S. Equity Index
         Portfolio), a specialized equity mutual fund (Fidelity Magellan), a
         low-priced stock fund (Fidelity Low-Priced Stock Fund), a money market
         mutual fund (Fidelity Retirement Money Market Portfolio), a fixed
         income fund (Interest Income Fund), a global equity mutual fund (Morgan
         Stanley Institutional Fund, Inc. - Global Equity Portfolio), an
         Armstrong stock fund, an overseas fund (Fidelity Overseas Fund) , an
         "OTC" mutual fund (Over-the-counter Portfolio), three Asset Manager
         mutual funds (Fidelity Asset Manager Fund, Fidelity Asset Manager:
         Income Fund, and Fidelity Asset Manager: Growth Fund), and two
         value-oriented mutual funds (Miller, Anderson & Sherrard, LLP Value
         Portfolio and Miller, Anderson & Sherrard, LLP Mid Cap Value
         Portfolio). The Plan utilizes the Trustee and associated investment
         managers to direct investment activity. The Plan participates in all
         fourteen investment alternatives.

         The following is a description of the investment funds to which Plan
         participants can elect to allocate their contributions. Participants
         should refer to fund prospectuses for more complete information
         regarding the investment funds.

         1.   Commingled Equity Fund - This fund is principally a portfolio of
              common stocks constructed and maintained with the objective of
              providing investment results which approximate the overall
              performance of the common stocks included in the Standard &
              Poor's Composite Index of 500 stocks. At September 30, 1998,
              there were 1,730 active participants in this investment fund.
         
         2.   Specialized Equity Fund - This fund invests in common stocks of
              companies having substantial growth prospects as determined by
              independent investment managers. At September 30, 1998, there
              were 2,314 active participants in this investment fund.
         
         3.   Low-Priced Stock Fund - This fund seeks capital appreciation
              through investments in mainly U.S. and foreign low-priced stocks
              that may be undervalued, overlooked or out of favor. At September
              30, 1998, there were 126 active participants in this investment
              fund.
         
         4.   Money Market Fund - This fund invests in short-term (less than
              one year maturity) fixed income instruments such as U.S. Treasury
              Bills, bank certificates of deposit, and high grade commercial
              paper. At September 30, 1998, there were 6,033 active
              participants in this investment fund.
         
         5.   Fixed Income Fund - Contributions to this fund are invested in
              the general accounts of insurance companies and are credited at
              contracted interest rates. Invested principal and accumulated
              interest amounts are guaranteed against loss by the insurance
              company. Crediting interest rates are reset periodically during
              the plan year. At September 30, 1998, the interest rates ranged
              between 5.45% and 8.26%. At September 30, 1997, the interest
              rates ranged between 5.53% and 8.26%. The average yields for the
              plan years ended September 30, 1998 and September 30, 1997, were
              6.22% and 6.20%, respectively. The fair value of the contracts
              approximate cost. At September 30, 1998, there were 3,783 active
              participants in this investment fund.
         
         6.   Global Equity Portfolio - This fund invests in a diversified
              selection of stocks throughout the world, after a detailed
              analysis by local country investment experts. It seeks to
              increase the value of the investment over the long term through
              growth of capital. At September 30, 1998, there were 145 active
              participants in this investment fund.
         
         7.   Armstrong Stock Fund - Amounts invested in this fund, along with
              dividend earnings thereon, are invested in Armstrong common
              stock. At September 30, 1998, there were 5,900 active
              participants in this investment fund. Common stock shares held by
              the fund at September 30, 1998 and 1997 were 193,284 and 190,268,
              respectively.
         
         8.   Overseas Fund - This fund invests in securities of issuers whose
              principal business activities are outside the U.S. Investments
              may include common stock and securities convertible into common
              stock, as well as debt instruments. At September 30, 1998, there
              were 52 active participants in this investment fund.

                                      13
<PAGE>
 
                 THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                   Notes to Financial Statements, (Continued)

          9.   OTC Portfolio Fund - This fund invests in securities traded in
               the over-the-counter securities market with the objective of
               maximizing capital appreciation. Over-the-counter securities
               include common and preferred stocks, securities convertible into
               common stock, warrants, and debt instruments. At September 30,
               1998, there were 809 active participants in this investment fund.

          10.  Asset Manager Fund - An asset allocation fund which invests in a
               portfolio of stocks, bonds, and short-term instruments. The fund
               has a balanced investment strategy with a goal of high total
               return with reduced risk over the long term. At September 30,
               1998, there were 404 active participants in this investment fund.

          11.  Asset Manager - Income Fund - An asset allocation fund which
               invests in a diversified portfolio of stocks, bonds, and
               short-term instruments. The fund has an investment strategy
               focusing on bonds and short-term instruments to achieve a high
               level of current income and capital preservation. At September
               30, 1998, there were 163 active participants in this investment
               fund.

          12.  Asset Manager - Growth Fund - An asset allocation fund invested
               in a diversified mix of stocks, bonds, and short-term
               instruments. The fund's investment strategy is an aggressive one
               emphasizing stocks with the goal of maximum total return over the
               long term. At September 30, 1998, there were 648 active
               participants in this investment fund.

          13.  Mid Cap Value Portfolio - This fund invests in undervalued common
               stocks of mid-sized companies with a strong potential for
               increase in share price It seeks to provide above-average long-
               term returns. At September 30, 1998, there were 223 active
               participants in this investment fund.

          14.  Value Portfolio - This fund seeks to provide above average long-
               term returns by investing mostly in common stocks of large
               companies that are considered undervalued. At September 30, 1998,
               there were 78 active participants in this fund.

          The Loan Portfolio Fund represents the unpaid principal balances of
          loans made by Plan participants in accordance with established loan
          provision guidelines. At September 30, 1998, there were 789 loans
          outstanding.


          The following table presents the cost and estimated fair values of the
          investments in securities of the Master Trust at September 30, 1998
          and 1997:
<TABLE>
<CAPTION>
                                                   September 30, 1998                 September 30, 1997
                                                   ------------------                 ------------------
                 Investment                      Cost         Fair Value              Cost       Fair Value
                 ----------                      ----         ----------              ----       ----------
<S>                                      <C>                <C>               <C>              <C>        
         Commingled equity                $30,965,142        $54,298,768       $26,842,793      $49,670,121
         Specialized equity                53,733,116         70,514,675        47,477,208       67,994,282
         Low-priced stock                   1,226,454            974,094                 -                -
         Money market                       6,694,202          6,694,202         3,599,035        3,599,035
         Fixed income                     133,791,698        133,791,698       131,000,677      131,000,677
         Global equity portfolio            1,216,654          1,030,265                 -                -
         Armstrong stock                    8,381,834         10,340,697         7,741,413       12,759,960
         Overseas                             410,197            342,931                 -                -
         OTC portfolio                      9,668,586         10,301,519         8,856,292       11,271,195
         Asset manager                      5,385,573          5,863,649         4,618,388        5,482,241
         Asset manager income               2,936,801          3,062,879         1,717,521        1,845,575
         Asset manager growth               8,057,265          9,250,957         6,743,023        8,693,409
         Mid cap value portfolio            2,349,006          1,979,431                 -                -
         Value portfolio                      633,442            494,143                 -                -
         Loan portfolio                     5,025,880          5,025,880         4,573,178        4,573,178
                                            ---------          ---------         ---------        ---------
                                         $270,475,850       $313,965,788      $243,169,528     $296,889,673
                                         ============       ============      ============     ============
</TABLE>

                THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                      OF ARMSTRONG WORLD INDUSTRIES, INC.
                  Notes to Financial Statements, (Continued)

         The amounts of realized gain (loss) on investments in securities of the
         Master Trust for the years ended September 30, 1998, 1997, and 1996 are
         presented below:
<TABLE>
<CAPTION>
                                         Aggregate        Aggregate        Realized
                                         ---------        ---------        --------
                    1998                 Proceeds            Cost         Gain (Loss)
                    ----                 --------            ----         -----------
<S>                                      <C>                <C>            <C>      
         Commingled equity                  6,375,852         4,027,792       2,348,060
         Specialized equity                 8,249,869         6,150,026       2,099,843
         Low-priced stock                      79,015            83,741         (4,726)
         Global equity portfolio              116,139           123,406         (7,267)
         Armstrong stock                    2,084,876         1,188,574         896,302
         Overseas                              40,318            40,748           (430)
         OTC portfolio                      3,285,757         2,856,529         429,228
         Asset manager                      1,459,750         1,298,412         161,338
         Asset manager income                 726,059           705,660          20,399
         Asset manager growth               1,965,174         1,710,580         254,594
         Mid cap value portfolio              192,264           201,573         (9,309)
         Value portfolio                       55,756            58,416         (2,660)
                                               ------            ------         -------
                                          $24,630,829       $18,445,457      $6,185,372
                                          ===========       ===========      ==========

                    1997
                    ----
         Commingled equity                 $6,505,385        $4,225,966      $2,279,419
         Specialized equity                11,158,875         9,283,042       1,875,833
         Armstrong stock                    2,710,271         1,709,022       1,001,249
         OTC portfolio                      2,909,644         2,614,952         294,692
         Asset manager                      1,711,591         1,572,324         139,267
         Asset manager income               1,363,736         1,324,733          39,003
         Asset manager growth               2,653,318         2,324,810         328,508
                                         ------------      ------------     -----------
                                          $29,012,820       $23,054,849      $5,957,971
                                          ===========       ===========      ==========

                    1996
                    ----
         Commingled equity                 $2,623,858        $1,267,723      $1,356,135
         Specialized equity                 7,504,239         5,822,067       1,682,172
         Armstrong stock                    1,651,243         1,052,500         598,743
         OTC portfolio                      1,498,007         1,324,342         173,665
         Asset manager                      1,784,344         1,700,070          84,274
         Asset manager income                 819,155           802,142          17,013
         Asset manager growth               1,598,514         1,457,312         141,202
                                         ------------      ------------     -----------
                                          $17,479,360       $13,426,156      $4,053,204
                                          ===========       ===========      ==========
</TABLE>

     (b) Stock Ownership Funds
         ---------------------
         According to the terms of the trust agreement between Mellon Bank,
         N.A., the Trustee, and Armstrong World Industries, Inc., the Trustee
         manages a trust fund that has been created under the Plan and has been
         granted authority to purchase and sell Company common stock as is
         necessary to administer the Plan in accordance with its terms.

         At September 30, 1998, the investment in Company common stock
         represents 4,717,756 shares, valued at a quoted market price of $53.50.
         There are 1,819,655 shares held in the Allocated Armstrong Stock Fund
         and 2,898,101 shares held in the Unallocated Armstrong Stock Fund.
         During 1998, aggregate proceeds were $2,257,893, aggregate costs were
         $2,320,497, and the realized loss was $62,604. No gains or losses were
         realized during 1996 and 1997.

(5)  Company Contributions
     ---------------------
     The Company is obligated to make semi-annual contributions in cash or
     Company stock to the Stock Ownership Funds, on June 15 and December 15 of
     each year, which when aggregated with all exchange contributions, dividends
     received by the Trustee on the common stock held by the Trust, and trust
     earnings, is at least equal to the amount necessary to enable the Trustee
     to pay currently maturing obligations under the Guaranteed ESOP notes.
     (Note 6)

                                      14
<PAGE>
 
                   RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                   Notes to Financial Statements, (Continued)

(6)  Guaranteed ESOP Notes
     --------------------- 
     The shares of Company common stock held in the Plan's Stock Ownership
     Accounts were purchased from the Company from the proceeds of the sale of
     Guaranteed ESOP notes in a total principal amount of $270,000,000 in 1989.
     The Company has guaranteed the payment of principal and interest on the
     notes.

     The notes must be repaid in semi-annual installments with interest per
     annum at 8.35% on the Series A Guaranteed Serial ESOP Notes due 1989-2001
     and 8.92% on the Series B Guaranteed Serial ESOP notes due 2001-2004. At
     September 30, 1998, the Guaranteed ESOP notes for Series A and Series B
     were $70,495,204 and $120,043,000, respectively. At September 30, 1997, the
     Guaranteed ESOP notes for Series A and Series B were $91,984,803 and
     $120,043,000, respectively. The scheduled amortization of the notes for the
     next five fiscal years is as follows: 1999 - $23,103,053; 2000 -
     $25,277,000; 2001 - $22,115,150; 2002 - $34,442,000; 2003 - $39,816,000.

(7)  Loans Due Plan Sponsor
     ----------------------
     As part of the redesign of the Plan as discussed in note 2, the Company
     filed a Private Letter Ruling request with the Internal Revenue Service on
     May 20, 1996. The request sought IRS approval to allow for refinancing
     loans from the Company to the Plan to permit the extension of the share
     allocation time period. On October 31, 1996, the Company received a
     favorable ruling from the IRS. A refinancing loan is used to ensure that
     the number of shares allocated during a semi-annual allocation period is
     equal to the sum of participants' exchange, equity and match shares. At
     September 30, 1998, there were six loans outstanding totaling $14,971,603.

(8)  Benefits
     --------

     (a) Retirement Savings Accounts
         ---------------------------
         Under terms of the Plan, a participant (or a beneficiary) is eligible
         for benefits upon retirement, termination of employment, or death
         before retirement. Disbursement of the total amount credited to a
         participant's account is payable (i) in a lump sum or (ii) in the case
         of retirement, in such other manner as requested by the participant and
         approved by the Plan Administrator.

         In addition, an active employee may elect to withdraw all or any part
         of his account attributable to his after-tax contributions. Before
         reaching age 59 1/2, an active employee may withdraw his pretax
         contributions from the Sheltered Account, provided he can demonstrate
         financial hardship. Such employee shall be ineligible to make
         contributions for a 12 month period. An active employee may elect to
         withdraw all or any portion of his account balance in the
         Tax-Deductible (MIRA) and Rollover Accounts. A Tax-Deductible (MIRA)
         Account holds any contributions made to the Plan before January 1,
         1987. No new contributions may be made to this account.

         Under the rules of the Plan, the active employee may borrow the lessor
         of 50% or his vested account balance or $50,000. The money borrowed
         must come from the Retirement Savings Sheltered, Rollover, and Standard
         Accounts. Before-tax contributions are made to the Sheltered Account
         and after-tax contributions are made to the Standard Account. The
         amount of the loan is transferred to a Loan Reserve pledged as security
         for the loan and is evidenced by a promissory note payable to the Plan.
         Interest rates are determined periodically by the Retirement Savings
         Plan Committee in accordance with prevailing interest rates. The loans
         are reflected in the Loan Portfolio investment fund. Loan repayments
         are made by payroll deductions or in a manner agreed to by the employee
         and the Plan Administrator.

     (b) Stock Ownership Accounts
         ------------------------
         Upon death or any other separation from service from the Company,
         participants are entitled to receive a distribution of their vested
         account balances. Distributions are in the form of a lump sum cash
         payment or, upon request, Company common stock.

(9)  Obligation for Benefits 
     -----------------------
     All the funds of the Plan are held by investing institutions appointed by
     the Company under a trust agreement or investment contract. Benefits under
     the Plan are payable only out of these funds. The Company has no legal
     obligation to make any direct payment of benefits accrued under the Plan.

     Except as may be provided in an investment contract, neither the Company
     nor any investing institution guarantees the funds of the Plan against any
     loss or depreciation or guarantees the payment of any benefit thereunder.
     Although the Company has not expressed any intent to terminate the Plan, it
     may do so at any time. In case of termination or partial termination, the
     total amount in each employee's account will be distributed as the Plan
     Administrator directs.

                                      15
<PAGE>
 
                   RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                       OF ARMSTRONG WORLD INDUSTRIES, INC.
                   Notes to Financial Statements, (Continued)

(10) Eligibility
     -----------
     All regular full-time employees of the Company or of any participating
     affiliated company are eligible to participate in the Plan except for
     foreign nationals, leased employees, and those employees in a collective
     bargaining unit unless the collective bargaining agent for that unit agrees
     to coverage under the Plan.

     Eligible participants, who leave the Company and are later reemployed, can
     resume participation in the Plan on the date of rehire.

 (11) Diversification
      ---------------  
         Effective January 1, 1997, Plan participants who meet certain age and
         service requirements were granted the ability to diversify specified
         portions of their Stock Ownership Account balances in any combination
         the other investment funds available for Retirement Savings Account
         balances, except for the Fidelity Retirement Money Market Portfolio.

 (12) Federal Income Taxes 
      --------------------
         By a letter dated April 21, 1998, the Internal Revenue Service has
         determined and informed the Company that the Plan qualifies under the
         applicable provisions of the Internal Revenue Code and is therefore
         exempt from federal income taxes.

 (13) Master Trust Agreement
      ---------------------- 
         Effective October 1, 1990, the Plan established a Master Trust
         Agreement with Fidelity Management Trust Company. Under the Master
         Trust Agreement, the Plan assets held by Fidelity Management Trust
         Company are commingled and invested with the assets of the Retirement
         Savings Plan for Hourly-Paid Employees of Armstrong World Industries,
         Inc. Separate accounting for each plan under the Master Trust Agreement
         is provided by Fidelity Management Trust Company. The Plan has an
         undivided interest in the assets of this trust, and ownership is
         represented by proportionate dollar interest. The following summarizes
         the financial information of the Master Trust at September 30, 1998 and
         1997:
<TABLE>
<CAPTION>
                                                September 30, 1998                      September 30, 1997
                                                      Cost          Fair Value                Cost         Fair Value
                                                      ----          ----------                ----         ----------
<S>                                           <C>                 <C>                 <C>                <C>      
Money market fund                                7,277,128           7,277,128           4,332,728          4,332,728
Armstrong common stock fund                     15,494,806          18,779,265          13,793,357         22,471,238
Registered investment companies                137,463,217         184,878,481         111,940,786        167,806,037
Fixed income insurance contracts               180,069,533         180,069,533         176,728,629        176,728,629
Loan portfolio                                   7,298,722           7,298,722           6,869,084          6,869,084
                                                 ---------           ---------           ---------          ---------
     Total investments in Master Trust         347,603,406         398,303,129         313,664,584        378,207,716
                                               ===========         ===========         ===========        ===========
Plan's interest in Master Trust                270,475,850         313,965,788         243,169,528        296,889,673
Plan's percentage in Master
     Trust                                           77.8%               78.8%               77.5%              78.5%
</TABLE>

During 1998 and 1997, the Plan's investments (including investments bought,
sold, and held during the year) appreciated in value as follows:

<TABLE>
<CAPTION>
                                                                      1998         1997
                                                                      ----         ----
<S>                                                             <C>          <C>      
Net appreciation (depreciation) in fair value of investments
  in the Fidelity Management Trust
  Company Master Trust                                          (6,524,510)  40,903,095
Allocated net appreciation (depreciation) in fair value of
  investments in the Master Trust                               (4,044,835)  34,962,801


During 1998 and 1997, interest and dividends were as follows:

<CAPTION> 
                                                                 1998         1997
                                                                 ----         ----       
<S>                                                       <C>          <C>      
Interest and dividends in Fidelity                 
  Management Trust Company                         
  Master Trust                                             23,337,613   17,683,902
Allocated interest and dividends from              
  investment in Master Trust                               18,427,493   13,704,974
</TABLE>

All of the above information was certified by the trustee at September 30, 1998
and 1997 and for the years then ended.

                                      16
<PAGE>
 
                   THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                         OF ARMSTRONG WORLD INDUSTRIES, INC.
              Line 27A - Schedule of Assets Held for Investment Purposes
                               September 30, 1998

     Description of Investment                  Cost              Current Value
- -------------------------------------------------------------------------------

Unallocated Armstrong Stock Fund             $138,384,323         $155,048,402

Allocated Armstrong Stock Fund                $80,838,060          $97,351,544

Investment in Master Trust                   $270,475,850         $313,965,788



                                      17
<PAGE>
 
                THE RETIREMENT SAVINGS AND STOCK OWNERSHIP PLAN
                      OF ARMSTRONG WORLD INDUSTRIES, INC.
                Line 27D - Schedule of Reportable Transactions
                              September 30, 1998
<TABLE> 
<CAPTION> 

      (a)              (b)         (c)        (d)        (e)               (f)                (g)
 Identity of       Description   Purchase   Selling    Cost of      Current Value of       Net  Gain
Party Involved      of Asset      Price      Price      Asset     Asset on Trans. Date     or (Loss)
- --------------      --------      -----      -----      -----     --------------------     ---------
<S>                <C>          <C>         <C>        <C>        <C>                      <C> 

</TABLE> 

*No transactions are reportable for the plan year ended, September 30, 1998.

                                      18
<PAGE>
 
                         Independent Auditors' Report


The Retirement Committee
Armstrong World Industries, Inc.:

We have audited the accompanying statements of net assets of The Retirement 
Savings and Stock Ownership Plan of Armstrong World Industries, Inc. as of 
September 30, 1998 and 1997 and the related statements of changes in plan equity
for each of the years in the three-year period ended September 30, 1998. These 
financial statements are the responsibility of the plan's management. Our 
responsibility is to express an opinion on these financial statements based on 
our audits.

We conducted our audits in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to obtain 
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting 
the amounts and disclosures in the financial statements. An audit also includes 
assessing the accounting principles used and significant estimates made by 
management, as well as evaluating the overall financial statement presentation. 
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in 
all material respects, the financial position of The Retirement Savings and 
Stock Ownership Plan of Armstrong World Industries, Inc. as of September 30, 
1998 and 1997 and the changes in plan equity for each of the years in the 
three-year period ended September 30, 1998, in conformity with generally 
accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the basic 
financial statements taken as a whole. The supplemental schedules of assets held
for investment purposes and reportable transactions are presented for the 
purpose of additional analysis and are not a required part of the basic 
financial statements but are supplementary information required by the 
Department of Labor's Rules and Regulations for Reporting and Disclosure under
the Employee Retirement Income Security Act of 1974. These supplemental
schedules are the responsibility of the plan's management. The fund information
in the statements of net assets and the statements of changes in plan equity is
presented for purposes of additional analysis rather than to present the net
assets and changes in plan equity of each fund. The supplemental schedules and
fund information have been subjected to the auditing procedures applied in the
audits of the basic financial statements and, in our opinion, are fairly stated
in all material respects in relation to the basic financial statements taken as
a whole.

                                   KPMG LLP

Philadelphia, PA
March 11, 1999

                                      19
<PAGE>
 
                                 EXHIBIT INDEX


23  Consent of Independent Auditors

<PAGE>
 
 
                        Consent of Independent Auditors
                        -------------------------------

The Retirement Committee
Armstrong World Industries, Inc.:


We consent to incorporation by reference in the Registration Statement No. 33-
18996 on Form S-8 of Armstrong World Industries, Inc. of our report dated
March 11, 1999, relating to the statements of net assets of The Retirement
Savings and Stock Ownership Plan of Armstrong World Industries, Inc. as of
September 30, 1998 and 1997 and the related statements of changes in plan equity
for each of the years in the three-year period ended September 30, 1998, which
report is included herein.

                                   KPMG LLP


Philadelphia, PA
March 11, 1999



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