Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Product Warranties

Product Warranties
12 Months Ended
Mar. 31, 2022
Guarantees [Abstract]  
Product Warranties Product Warranties
The Company offers various warranties on its products, including a 30-year limited warranty on certain fiber cement siding products in the United States. A typical warranty program requires the Company to replace defective products within a specified time period from the date of sale. It is possible that future warranty costs could differ from those estimates.
The following are the changes in the product warranty provision:
  31 March
(Millions of US dollars) 2022 2021 2020
Balance at beginning of period $ 39.6  $ 42.4  $ 46.6 
Increase in accrual 1.9  2.4  0.8 
Settlements made in cash or in kind (3.8) (5.2) (5.0)
Balance at end of period $ 37.7  $ 39.6  $ 42.4