Accoya

Accoya is an ultra-high performance wood made from sustainably sourced timber and modified through a patented acetylation process, delivering unmatched durability and dimensional stability. Accoya can be left natural or finished to suit any design, providing lasting performance in any climate or application. Backed by a 50-year above-ground warranty and 25 years in-ground or freshwater, Accoya is the trusted choice for exterior projects where longevity and low maintenance are key.

Stability

Accoya wood offers exceptional dimensional stability, swelling 3–4 times less than traditional wood to keep projects looking great for decades after installation.

Sustainability

Accoya comes from FSC® certified forests, is one of the few building materials certified Cradle to Cradle® at the Gold level, and is non-toxic and 100% recyclable.

Durability

Accoya delivers exceptional durability, backed by a 50-year warranty above ground and 25 years in ground or freshwater, certified for use in termite zones, and proven to be 22 times more resistant than pine, with a service life of up to 60 years in real-world conditions.

Versatility

Accoya is the ultimate versatile substrate, trusted by craftsmen for its excellent machinability, improved density and hardness without compromising strength, and the flexibility to be left natural or finished to suit any design — delivering lasting performance in any climate or application.

The secret behind Accoya®

Accoya isn’t just wood. It’s wood transformed.

Through a natural process called acetylation, we take fast-growing softwood and enhance it to perform like the finest hardwoods—without the drawbacks. The science is simple: by changing the way the wood interacts with water, we remove the root cause of swelling, shrinking, warping and rot.

The result is real, non-toxic wood that lasts for decades, stays dimensionally stable, and needs less maintenance. Even better, the process is circular: the only by-product is reused as vinegar for other industries.

Watch our video to find out more.

Why it matters

Water is the enemy of traditional wood. Accoya is different. It doesn’t absorb moisture, so it won’t distort, decay or become vulnerable to insects. That means windows that glide smoothly, decks that stay flawless, and cladding that keeps its clean lines year after year.

Accoya gives you confidence. Confidence that what you design, build, or create will endure. From homes to landscapes, boats to bespoke furniture – Accoya is wood, perfected.

ce wood made from sustainably sourced timber and modified through a patented acetylation process, delivering unmatched durability and dimensional stability. Accoya can be left natural or finished to suit any design, providing lasting performance in any climate or application. Backed by a 50-year above-ground warranty and 25 years in-ground or freshwater, Accoya is the trusted choice for exterior projects where longevity and low maintenance are key.

Unrivalled benefits

Stable

Sustainable

Durable

Versatile

Accoya Colour Grey

Choose Accoya for your next project.

We welcome your enquiries.
Please call us on 0191 489 8231 or email sales@mhsouthern.co.uk.

M.H. Southern offer a range of Specialist Timbers to customers looking for higher quality materials for particular projects.

We also offer full milling, treatment and strength grading facilities for all the timbers we supply. In addition our transport fleet has crane off load facilities.

If you require any further information on any of our specialist timbers,
please call our Sales Office on 0191 489 8231 or email sales@mhsouthern.co.uk.