| Goodwill and Other Intangible Assets Goodwill The following are the changes in the carrying value of goodwill: | | | | | | | | | | | | | | | | | | | | | | | | | (Millions of U.S. dollars) | Europe | | Siding & Trim | | Deck, Rail & Accessories | | Total | Balance - March 31, 2026 | $ | 205.0 | | | $ | 1,141.2 | | | $ | 3,434.2 | | | $ | 4,780.4 | | | Foreign exchange impact | (1.5) | | | — | | | — | | | (1.5) | | | Adjustments to Acquisition of The AZEK Company | — | | | (0.8) | | | (2.3) | | | (3.1) | | Balance - June 30, 2026 | $ | 203.5 | | | $ | 1,140.4 | | | $ | 3,431.9 | | | $ | 4,775.8 | | |
Intangible Assets The following are the net carrying amount of indefinite lived intangible assets other than goodwill: | | | | | | | | | | | | | June 30, | | March 31, | | (Millions of U.S. dollars) | 2026 | | 2026 | | Trade names | $ | 117.3 | | | $ | 118.2 | | | Other | 7.6 | | | 7.4 | | | Total | $ | 124.9 | | | $ | 125.6 | |
The following are the net carrying amount of amortizable intangible assets: | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | (Millions of U.S. dollars) | Lives in Years | Gross Carrying Amount | | Accumulated Amortization | | Net Carrying
Amount | | Customer Relationships | 2 to 18 | $ | 2,880.0 | | | $ | (228.4) | | | $ | 2,651.6 | | | Trade Names | 5 to 15 | 330.0 | | | (26.7) | | | 303.3 | | | Technology | 10 | 210.0 | | | (29.3) | | | 180.7 | | | Total | | $ | 3,420.0 | | | $ | (284.4) | | | $ | 3,135.6 | |
| | | | | | | | | | | | | | | | | | | | | | | March 31, 2026 | | (Millions of U.S. dollars) | Lives in Years | Gross Carrying Amount | | Accumulated Amortization | | Net 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 | |
The amortization of intangible assets was $78.9 million and $1.3 million and for the three months ended June 30, 2026 and 2025, respectively. As of June 30, 2026, the remaining weighted average amortization period for acquired intangible assets was 16.4 years.
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