Accoya® Modified Wood for Exterior Cladding, Decking & Millwork | Hardwoods
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Exterior Wood | Modified Wood | Accoya®
Real wood performance for demanding exterior applications.Accoya® modified wood is engineered for long-term exterior performance, offering the warmth and workability of real wood with enhanced resistance to movement, moisture, rot, and outdoor exposure. Hardwoods supplies Accoya for commercial project teams, fabricators, millwork shops, and trade professionals who need a premium exterior wood solution with reliable performance and dependable distribution support. Shop Accoya Products Contact Your Local Branch |
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Material Confidence
Designed for exterior projects where performance cannot be left to chance. |
Exterior wood applications place heavy demands on material performance. Moisture, temperature swings, UV exposure, and long-term dimensional movement can impact the look, fit, finish, and service life of a project. Accoya is modified from surface to core through acetylation, helping create a more stable and durable wood product for exterior environments. The result is a material that supports strong design intent while helping reduce common exterior wood performance concerns. For project teams, that means greater confidence across cladding, siding, decking, trim, millwork, doors, windows, and specialty exterior components. |
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How Accoya Works
Acetylation changes the wood, not just the surface.Accoya is modified through acetylation, a process that improves the wood from surface to core. This helps increase dimensional stability, durability, and resistance to moisture-related movement. Watch the animation to see how the process helps create a high-performance exterior wood solution while preserving the natural character and workability of real wood. |
Why project teams specify Accoya.
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Durability
Long Service Life
Engineered for demanding exterior use and long-term material confidence. |
Stability
Reduced Movement
Helps limit swelling, shrinking, and dimensional change across changing conditions. |
VERSATILITY
Coating Performance
Supports improved coating performance and a more consistent exterior appearance. |
SUSTAINABILITY
Responsible Choice
Responsibly sourced and built to last, Accoya supports sustainable exterior design. |
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Warranty Highlights
Backed by long-term warranty coverage for demanding exterior applications.Accoya offers one of the strongest warranty positions in exterior wood, helping give architects, builders, fabricators, and commercial project teams added confidence when specifying real wood for long-term performance. |
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Above Ground Applications
50
Year Warranty
Backed by a 50-year warranty for above-ground use, supporting confidence in cladding, siding, trim, millwork, doors, windows, and other exterior applications. |
In-Ground & Freshwater Applications
25
Year Warranty
Supported by a 25-year warranty for in-ground or freshwater applications, helping extend Accoya® performance into more demanding exterior conditions. |
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Warranty coverage is subject to Accoya terms, application type, installation conditions, and current manufacturer documentation. Always review the latest warranty and technical guidance before specification or installation.
Choose the Accoya solution that fits the project.
Hardwoods supplies Accoya products for trade and commercial customers seeking premium exterior wood performance. Product availability may vary by branch and market.
Natural Appearance
Accoya NaturalA versatile modified wood option with a natural wood look, strong exterior performance, and a finish that gradually silvers with outdoor exposure. View Accoya Natural |
Weathered Aesthetic
Accoya Color GreyA pre-greyed Accoya option designed to deliver a weathered visual with the performance benefits of modified wood. View Accoya Color Grey |
Built for exterior design, fabrication, and specification needs.
Cladding & SidingA strong choice for exterior facades, rainscreen systems, and siding applications where stability, appearance, and service life matter. |
Decking & Exterior SpacesSuitable for decks, terraces, walkways, and outdoor commercial environments where premium wood appearance and durability are important. |
Exterior MillworkA dependable substrate for windows, doors, trim, shutters, and specialty fabricated components where reduced movement is critical. |
Performance details that help support confident material selection.
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Modified from surface to coreAccoya is acetylated to the core at a cellular level, not simply treated on the surface, supporting consistent performance across the material. |
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Designed to hold shapeIts dimensional stability helps reduce swelling, shrinking, and distortion that can affect exterior assemblies over time. |
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Supports premium finishesAccoya provides a strong platform for exterior coatings, helping maintain appearance and performance expectations. |
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Works like woodIt machines, profiles, and fabricates well, making it a strong fit for shops producing custom exterior components. |
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Broad exterior useCommon applications include cladding, siding, decking, doors, windows, trim, millwork, and specialty exterior details. |
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Backed by HardwoodsHardwoods supports trade customers with branch access, product knowledge, and regional availability guidance. |
Always review current manufacturer technical documentation, installation guidance, warranty terms, fire-rating requirements, and local code requirements before specification or installation.
Exterior-grade confidence without giving up the character of wood.
From warm natural wood expressions to contemporary exterior profiles, Accoya® gives project teams the flexibility to design with real wood while addressing the performance demands of exterior environments.
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Hardwoods Advantage
Source Accoya® with confidence through Hardwoods.Connect with your local Hardwoods branch for Accoya® availability, product guidance, technical resources, and support for upcoming exterior wood projects. | Contact Hardwoods Accoya 2026 Brochure Shop Accoya Products |