Accoya vs. Thermally Modified Ash: Which Wood Is Better for Exterior Cladding?

adv thermal ash sidingrainscreen

When choosing wood for exterior cladding, durability and dimensional stability are just as important as appearance. Accoya and thermally modified ash are both designed to perform better outdoors than untreated wood, but they get there in different ways. Accoya stands out for its exceptional stability and resistance to moisture-related movement, while thermally modified ash offers …

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Acetylation: What Is It and What Is Acetylated Wood?

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Understanding the Innovative Wood Technology Behind Accoya® Wood When you search online for “acetylation,” you’ll find academic journals and scientific entries explaining it in technical detail. But let’s skip the jargon of hydroxyls and hydrogen atoms. Simply put, acetylation—as it pertains to wood technology—is: Modifying wood by treating softwood with a substance akin to vinegar, …

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