Accoya®
Superior Sustainability
Sustainably sourced timber built to last. With unmatched stability, beauty, and strength, Accoya outperforms tropical hardwoods and comes with a 50 year above ground warranty.
Accoya® wood offers the beauty of natural timber with performance that surpasses tropical hardwoods. Through a non-toxic acetylation process, Accoya achieves exceptional dimensional stability, durability, and longevity without relying on chemicals or old growth forests.
At Delta Millworks, we elevate Accoya through precision milling, premium finishes, and design driven textures developed for modern architecture.
Modified for Lasting Performance
Accoya is transformed through a non-toxic acetylation process that hardens the wood from the inside out. The result is timber that resists movement, fights decay, and dramatically extends the life of the material without relying on harmful chemical treatments or old growth forests.
At Delta Millworks, we take this high performance wood and elevate it using precision milling, rich finishes, and design-driven textures, creating siding, decking, and interior wood products that are as striking as they are enduring.
Made to Last
Unrivaled Accoya Warranty
50 years: above ground warranty when installed according to our specifications
25 years: in ground or fresh water, in applications with ground contact.
Proven Performance in the Field
Accoya has been rigorously tested and specified across residential commercial and hospitality projects.
WUI compliant with SFM 12 7A 1 fire rating
Excellent paint and coating retention
Recognized by The Architect’s Newspaper Best of Products 2024 Architectural Record Product of the Year 2024
Why do Architects and Builders Choose Accoya?
Accoya® is engineered to perform in demanding environments without sacrificing the warmth and character of natural wood. Its exceptional stability and durability make it a trusted material for projects where longevity, precision, and design integrity matter.
Design Forward Collaboration
Delta Millworks works closely with architects, designers, and builders through ongoing collaborations that explore new textures, finishes, and applications for Accoya®. These partnerships keep our product offerings aligned with emerging design trends while ensuring every solution meets the performance demands of contemporary architecture.
The Key Features
Outstanding durability & dimensional stability
Engineered to maintain its shape and strength over time, resisting warping, cracking, or shrinking even in changing climates.
Barrier to insects
Naturally resistant to pests, providing long-lasting protection without the need for chemical treatments.
Naturally insulating
Helps regulate temperature, keeping interiors comfortable while reducing energy demands.
Non-toxic and recyclable
Safe for people and the environment, made without harmful chemicals and fully recyclable at the end of its life.
Dive Into the Details with Robbie and Baker
Accoya adapts effortlessly to a wide range of architectural uses without sacrificing performance or beauty. Engineered for long lasting stability and exceptional durability, it brings natural warmth and texture to every project while standing up to moisture, sun, and temperature swings. Barefoot friendly and low maintenance, Accoya is ideal for both residential and commercial applications that demand both performance and beauty. .
Applications
Exterior Applications
Accoya® siding offers lasting performance for residential and commercial buildings. With superior resistance to decay, insects, and movement, it maintains its color and finish for years while providing a natural, sophisticated aesthetic. Factory finishing at Delta Millworks ensures each piece delivers consistent quality, rich texture, and design driven detail.
Interior Applications
From ceilings and soffits to wall paneling, Accoya brings architectural stability and lasting beauty indoors. Its dimensional stability and coating retention make it ideal for spaces where finish longevity matters, while its natural warmth creates a refined, tactile environment.
Decking
Accoya decking combines comfort, performance, and sustainability. Low maintenance and barefoot friendly, it withstands moisture, sun, and heavy use without warping or fading. Perfect for pools, terraces, and outdoor living spaces, Delta Millworks’ precision milling and finishes ensure every board performs consistently while elevating the overall design.
Explore Starwood Firehouse
Watch this video to see the excellent durability of the Coastline finish after 5 years of exposure in the harsh climate of Aspen, Colorado.
Apart from cleaning, no maintenance has been done on the finish that is weathering beautifully.
Explore Bolt Ranch
Join builder James Hendricks and Delta’s Robbie Davis as they explore this working ranch east of Park City, Utah. The custom texture and finish they selected for the Accoya siding was chosen to blend into the landscape with a continuous color extending from siding to soffit.
