06/22/2026
The 2024 IRC updated the decay resistance requirements for deck construction - and it's one of the most important changes deck builders need to understand before their next build. ๐ชต
Section R507.2.1 now defines exactly what qualifies as naturally durable wood, introduces sapwood restrictions that affect common cedar and redwood grades, and outlines specific treatment level requirements for pressure treated lumber under AWPA U1.
Knowing which materials meet the new standard - and which ones no longer qualify - can be the difference between a build that passes inspection and one that doesn't.
We put together a full breakdown of what changed and what it means for your material choices.
๐ Read the full guide here:
https://www.premiumdeckingsupply.com/2024-irc-deck-code-changes-treated-wood/