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Pay vs Performance Disclosure - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Pay vs Performance Disclosure          
Pay vs Performance Disclosure, Table
Pay Versus Performance
The following table shows the total compensation for our CEO for the past three fiscal years as set forth in the Summary Compensation Table, the “compensation actually paid” to our CEO and, on an average basis our other NEOs (in each case, as determined under SEC rules), our TSR, the TSR of our peer group over the same period, our net income (loss), and the financial performance measure that we have selected for compensatory purposes, adjusted EBITDA. See “Compensation Discussion and Analysis” for information regarding the Company’s
pay-for-performance
philosophy and how the Company aligns executive compensation with the Company’s performance.
 
                            Value of $100
Investment
Based on		              
Year   Summary
Compensation
Table Total for
CEO
(1)
     Compensation
Actually Paid
CEO
(2)
     Average
Summary
Compensation
Table Total for
other NEOs
(3)
     Average
Compensation
Actually Paid
for Other
NEOs
(4)
     TSR
(5)
     Peer
Group
TSR
(6)
     Net Income
(loss) $ in
millions
(7)
     Company
Selected
Measure:
Adjusted
EBITDA $ in
millions
(8)
  
2025
     8,537,000       30,342,316       1,715,854       3,451,632       269.42       135.30       308.7       555  
2024
     9,154,261       30,772,840       1,570,660       3,341,132       197.71       146.09       264.9       486  
2023
     13,541,716       19,471,327       1,445,754       1,829,459       136.68       135.44       223.8       430  
2022
     6,274,658       (9,191,709 )      1,519,954       342,164       93.91       94.54       202.9       385  
2021
     6,830,772       19,752,199       1,497,830       2,878,943       157.49       139.35       183.2       372  
(1)
Mr. Grizzle was the CEO for each year through 2025.
(2)
SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine “compensation actually paid” as reported in the Pay versus Performance Table. “Compensation actually paid” does not necessarily represent cash and/or equity value transferred to our CEO without restriction, but rather is a value calculated under applicable SEC rules. In general, “compensation actually paid” is calculated as Summary Compensation Table total compensation adjusted to include the fair market value of equity awards as of December 31 of the applicable year or, if earlier, the vesting date (rather than the grant date) and certain adjustments in the values of pensions. Compensation actually paid generally fluctuates due to stock price achievement and varying levels of projected and actual achievement of performance goals (as reflected in the significant decrease to 2021 and 2022 compensation actually paid). For information regarding the decisions made by our MDCC in regard to the CEOs compensation for each fiscal year, please see the “Compensation Discussion and Analysis” sections in this proxy statement and in the proxy statement for our annual meeting of shareholders for 2022, 2023, 2024 and 2025.
 
Year   2025     2024     2023     2022     2021  
CEO
          
SCT Total Compensation
     8,537,000       9,154,261       13,541,716       6,274,658       6,830,772  
Less: Stock Award Values Reported in SCT for the Covered Year ($)     (5,599,532 )      (6,137,577 )      (11,019,636 )      (4,433,797 )      (4,442,344 ) 
Plus: Fair Value at
Year-End
for Stock Awards Granted in the Covered Year that Remain Outstanding ($)		     8,114,441       8,220,468       15,171,133       1,376,041       7,261,925  
Change in Fair Value during the Year of Outstanding Unvested Stock Awards Granted in Prior Years ($)     18,485,585       16,092,447       1,778,114       (8,646,831 )      6,754,468  
Change in Fair Value of Stock Awards Granted in Prior Years that Vested in the Covered Years ($)     804,822       3,443,241       —         (3,761,780 )      3,347,378  
Less: Fair Value of Stock Awards Forfeited during the Covered Year ($)     —         —         —         —         —    
Compensation Actually Paid ($)
     30,342,316       30,772,840       19,471,327       (9,191,709 )      19,752,199  
 
 
(3)
The following
non-CEO
named executive officers are included in the average figures
shown
  a.
2024 and 2025: Christopher Calzaretta, Mark Hershey, Austin So and Jill
Crager
  b.
2023: Christopher Calzaretta, Mark Hershey, Austin So and Monica Maheshwari
  c.
2022: Christopher Calzaretta, Mark Hershey, Austin So and Ellen Romano
  d.
2021: Brian MacNeal, Charles Chiappone, Mark Hershey, and Ellen Romano
 
(4)
Average “compensation actually paid” for our
non-CEO
NEOs in each of 2025, 2024, 2023, 2022 and 2021 reflects the adjustments to the Summary Compensation Table totals required by the SEC rules. For information regarding the decisions made by our MDCC in regard to the
non-CEO
NEOs compensation for each fiscal year, please see the “Compensation Discussion and Analysis” in this proxy statement and in the proxy statement for our annual meeting of shareholders for 2022, 2023, 2024 and 2025.
 
Year    2025     2024     2023     2022     2021  
Non-CEO
NEOs
           
SCT Total Compensation
      1,715,854       1,570,660       1,445,754       1,519,954       1,497,830  
Less: Stock Award Values Reported in SCT for the Covered Year ($)      (710,406 )      (599,265 )      (638,773 )      (884,408 )      (631,405 ) 
Plus: Fair Value at
Year-End
for Stock Awards Granted in the Covered Year that Remain Outstanding ($)		      915,749       802,527       847,663       396,089       966,107  
Change in Fair Value during the Year of Outstanding Unvested Stock Awards Granted in Prior Years ($)      1,417,641       1,379,746       170,743       (601,087 )      706,872  
Change in Fair Value of Stock Awards Granted in Prior Years that Vested in the Covered Years ($)      112,795       187,464       4,072       (88,384 )      339,539  
Less: Fair Value of Stock Awards Forfeited during the Covered Year ($)      —        —         —         —         —    
Less: Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans ($)      —        —        —        —        —    
Plus: Aggregate Service Cost and Prior Service Cost for Pension Plans ($)      —        —        —        —        —   
Compensation Actually Paid ($)      3,451,632       3,341,132       1,829,459       342,164       2,878,943  
(5)
For the relevant fiscal year, represents the cumulative total shareholder return (TSR) of the Company for the measurement periods ending on December 31 of each of 2025, 2024, 2023, 2022 and 2021, respectively, assuming $100 invested in our shares of Common Stock on December 31, 2020, and reinvestment of all dividends.
(6)
For the relevant fiscal year, represents the cumulative TSR of our financial peer group (“Peer Group TSR”) for the measurement periods ending on December 31 of each of 2025, 2024, 2023, 2022 and 2021, respectively, assuming $100 invested in shares of common stock of our Peer Group on December 31, 2020, and reinvestment of all dividends. The financial peer group is composed of the following companies: Allegion PLC, A.O. Smith Corporation, Apogee Enterprises, Inc., Acuity Brands, Inc., Fortune Brands Home & Security, Inc., James Hardie Industries, Lennox International Inc., Masco Corporation, Mohawk Industries, Inc., Owens Corning, Sherwin-Williams Company, Simpson Manufacturing Co., Inc. and Interface, Inc.
(7)
Reflects “Net Income (Loss)” as reported in the Company’s Consolidated Income Statements included in the Company’s Annual Reports on Form
10-K
for each of the years ended December 31, 2025, 2024, 2023, 2022 and 2021.
(8)
Company-selected measure is adjusted EBITDA, which is operating income plus depreciation, amortization plus/minus
non-cash
pension impact and plus/minus earnout/deferred purchase price accruals and certain acquisition-related charges, subject to certain exceptions and described more fully in “Compensation Discussion and Analysis” in this proxy statement.
       
Company Selected Measure Name Adjusted EBITDA        
Named Executive Officers, Footnote
 
(3)
The following
non-CEO
named executive officers are included in the average figures
shown
  a.
2024 and 2025: Christopher Calzaretta, Mark Hershey, Austin So and Jill
Crager
  b.
2023: Christopher Calzaretta, Mark Hershey, Austin So and Monica Maheshwari
  c.
2022: Christopher Calzaretta, Mark Hershey, Austin So and Ellen Romano
  d.
2021: Brian MacNeal, Charles Chiappone, Mark Hershey, and Ellen Romano
       
Peer Group Issuers, Footnote For the relevant fiscal year, represents the cumulative TSR of our financial peer group (“Peer Group TSR”) for the measurement periods ending on December 31 of each of 2025, 2024, 2023, 2022 and 2021, respectively, assuming $100 invested in shares of common stock of our Peer Group on December 31, 2020, and reinvestment of all dividends. The financial peer group is composed of the following companies: Allegion PLC, A.O. Smith Corporation, Apogee Enterprises, Inc., Acuity Brands, Inc., Fortune Brands Home & Security, Inc., James Hardie Industries, Lennox International Inc., Masco Corporation, Mohawk Industries, Inc., Owens Corning, Sherwin-Williams Company, Simpson Manufacturing Co., Inc. and Interface, Inc.        
PEO Total Compensation Amount $ 8,537,000 $ 9,154,261 $ 13,541,716 $ 6,274,658 $ 6,830,772
PEO Actually Paid Compensation Amount $ 30,342,316 30,772,840 19,471,327 (9,191,709) 19,752,199
Adjustment To PEO Compensation, Footnote
(2)
SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine “compensation actually paid” as reported in the Pay versus Performance Table. “Compensation actually paid” does not necessarily represent cash and/or equity value transferred to our CEO without restriction, but rather is a value calculated under applicable SEC rules. In general, “compensation actually paid” is calculated as Summary Compensation Table total compensation adjusted to include the fair market value of equity awards as of December 31 of the applicable year or, if earlier, the vesting date (rather than the grant date) and certain adjustments in the values of pensions. Compensation actually paid generally fluctuates due to stock price achievement and varying levels of projected and actual achievement of performance goals (as reflected in the significant decrease to 2021 and 2022 compensation actually paid). For information regarding the decisions made by our MDCC in regard to the CEOs compensation for each fiscal year, please see the “Compensation Discussion and Analysis” sections in this proxy statement and in the proxy statement for our annual meeting of shareholders for 2022, 2023, 2024 and 2025.
 
Year   2025     2024     2023     2022     2021  
CEO
          
SCT Total Compensation
     8,537,000       9,154,261       13,541,716       6,274,658       6,830,772  
Less: Stock Award Values Reported in SCT for the Covered Year ($)     (5,599,532 )      (6,137,577 )      (11,019,636 )      (4,433,797 )      (4,442,344 ) 
Plus: Fair Value at
Year-End
for Stock Awards Granted in the Covered Year that Remain Outstanding ($)		     8,114,441       8,220,468       15,171,133       1,376,041       7,261,925  
Change in Fair Value during the Year of Outstanding Unvested Stock Awards Granted in Prior Years ($)     18,485,585       16,092,447       1,778,114       (8,646,831 )      6,754,468  
Change in Fair Value of Stock Awards Granted in Prior Years that Vested in the Covered Years ($)     804,822       3,443,241       —         (3,761,780 )      3,347,378  
Less: Fair Value of Stock Awards Forfeited during the Covered Year ($)     —         —         —         —         —    
Compensation Actually Paid ($)
     30,342,316       30,772,840       19,471,327       (9,191,709 )      19,752,199  
        
Non-PEO NEO Average Total Compensation Amount $ 1,715,854 1,570,660 1,445,754 1,519,954 1,497,830
Non-PEO NEO Average Compensation Actually Paid Amount $ 3,451,632 3,341,132 1,829,459 342,164 2,878,943
Adjustment to Non-PEO NEO Compensation Footnote
(4)
Average “compensation actually paid” for our
non-CEO
NEOs in each of 2025, 2024, 2023, 2022 and 2021 reflects the adjustments to the Summary Compensation Table totals required by the SEC rules. For information regarding the decisions made by our MDCC in regard to the
non-CEO
NEOs compensation for each fiscal year, please see the “Compensation Discussion and Analysis” in this proxy statement and in the proxy statement for our annual meeting of shareholders for 2022, 2023, 2024 and 2025.
 
Year    2025     2024     2023     2022     2021  
Non-CEO
NEOs
           
SCT Total Compensation
      1,715,854       1,570,660       1,445,754       1,519,954       1,497,830  
Less: Stock Award Values Reported in SCT for the Covered Year ($)      (710,406 )      (599,265 )      (638,773 )      (884,408 )      (631,405 ) 
Plus: Fair Value at
Year-End
for Stock Awards Granted in the Covered Year that Remain Outstanding ($)		      915,749       802,527       847,663       396,089       966,107  
Change in Fair Value during the Year of Outstanding Unvested Stock Awards Granted in Prior Years ($)      1,417,641       1,379,746       170,743       (601,087 )      706,872  
Change in Fair Value of Stock Awards Granted in Prior Years that Vested in the Covered Years ($)      112,795       187,464       4,072       (88,384 )      339,539  
Less: Fair Value of Stock Awards Forfeited during the Covered Year ($)      —        —         —         —         —    
Less: Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans ($)      —        —        —        —        —    
Plus: Aggregate Service Cost and Prior Service Cost for Pension Plans ($)      —        —        —        —        —   
Compensation Actually Paid ($)      3,451,632       3,341,132       1,829,459       342,164       2,878,943  
        
Compensation Actually Paid vs. Total Shareholder Return        
Compensation Actually Paid vs. Net Income        
Compensation Actually Paid vs. Company Selected Measure        
Total Shareholder Return Vs Peer Group        
Tabular List, Table
Most Important Financial Performance Measures
. Listed below are the financial performance measures which in our assessment represent the most important financial performance measures we used to link compensation actually paid to our named executive officers, for 2025, to company performance.
  a.
Absolute Total Shareholder Return
  b.
Adjusted EBITDA
  c.
Adjusted Free Cash Flow
  d.
Mineral Fiber Volume
  e.
Revenue
       
Total Shareholder Return Amount $ 269.42 197.71 136.68 93.91 157.49
Peer Group Total Shareholder Return Amount 135.3 146.09 135.44 94.54 139.35
Net Income (Loss) $ 308,700,000 $ 264,900,000 $ 223,800,000 $ 202,900,000 $ 183,200,000
Company Selected Measure Amount 555,000,000 486,000,000 430,000,000 385,000,000 372,000,000
PEO Name Mr. Grizzle        
Measure:: 1          
Pay vs Performance Disclosure          
Name Absolute Total Shareholder Return        
Measure:: 2          
Pay vs Performance Disclosure          
Name Adjusted EBITDA        
Non-GAAP Measure Description Company-selected measure is adjusted EBITDA, which is operating income plus depreciation, amortization plus/minus
non-cash
pension impact and plus/minus earnout/deferred purchase price accruals and certain acquisition-related charges, subject to certain exceptions and described more fully in “Compensation Discussion and Analysis” in this proxy statement. 		       
Measure:: 3          
Pay vs Performance Disclosure          
Name Adjusted Free Cash Flow        
Measure:: 4          
Pay vs Performance Disclosure          
Name Mineral Fiber Volume        
Measure:: 5          
Pay vs Performance Disclosure          
Name Revenue        
PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ (5,599,532) $ (6,137,577) $ (11,019,636) $ (4,433,797) $ (4,442,344)
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 8,114,441 8,220,468 15,171,133 1,376,041 7,261,925
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 18,485,585 16,092,447 1,778,114 (8,646,831) 6,754,468
PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 804,822 3,443,241 0 (3,761,780) 3,347,378
PEO | Fair Value of Stock Awards Forfeited During the Covered Year [Member]          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 0 0 0 0 0
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (710,406) (599,265) (638,773) (884,408) (631,405)
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 915,749 802,527 847,663 396,089 966,107
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 1,417,641 1,379,746 170,743 (601,087) 706,872
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 112,795 187,464 4,072 (88,384) 339,539
Non-PEO NEO | Fair Value of Stock Awards Forfeited During the Covered Year [Member]          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 0 0 0 0 0
Non-PEO NEO | Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans [Member]          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 0 0 0 0 0
Non-PEO NEO | Aggregate Service Cost and Prior Service Cost for Pension Plans [Member]          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ 0 $ 0 $ 0 $ 0 $ 0