v3.26.1
Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in the Carrying Value of Goodwill
The following are the changes in the carrying value of goodwill:
(Millions of US dollars)EuropeSiding & TrimDeck, Rail & AccessoriesTotal
Balance - March 31, 2024
$192.6 $— $— $192.6 
Foreign exchange impact1.1 — — 1.1 
Balance - March 31, 2025
$193.7 $— $— $193.7 
Foreign exchange impact11.3 — — 11.3 
Acquisition of The AZEK Company— 1,141.2 3,434.2 4,575.4 
Balance - March 31, 2026
$205.0 $1,141.2 $3,434.2 $4,780.4 
Schedule of Indefinite-Lived Intangible Assets
The following are the net carrying amount of indefinite lived intangible assets other than goodwill:
 March 31
(Millions of US dollars)20262025
Trade names$118.2 $111.6 
Other7.4 7.4 
Total$125.6 $119.0 
Schedule of Finite-Lived Intangible Assets
The following are the net carrying amount of amortizable intangible assets:
March 31, 2026
(Millions of US dollars)Lives in YearsGross Carrying AmountAccumulated AmortizationNet Carrying
Amount
Customer Relationships
2 to 18
$2,880.3 $(165.8)$2,714.5 
Trade Names
5 to 15
$330.0 $(19.6)$310.4 
Technology
10
$210.0 $(20.4)$189.6 
Total$3,420.3 $(205.8)$3,214.5 
March 31, 2025
(Millions of US dollars)Lives in YearsGross Carrying AmountAccumulated AmortizationNet Carrying
Amount
Customer Relationships
2 to 13
$47.5 $(20.9)$26.6 
Total$47.5 $(20.9)$26.6 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
At March 31, 2026, the estimated future amortization of intangible assets is as follows:
Years ended March 31 (Millions of US dollars):
Fiscal 2027
$315.4 
Fiscal 2028
332.2 
Fiscal 2029
345.5 
Fiscal 2030
332.5 
Fiscal 2031
295.2 
Thereafter1,593.7 
Total$3,214.5