ACCOYA, a real technological revolution in the field of wood... Accoya® uses a patented process of molecular modification of solid wood, called "acetylation", which makes it possible to create, from a traditional wood such as radiata pine, a wood of extremely durable superior quality and unparalleled dimensional stability.

What is Accoya® wood?

Accoya® is sustainably grown wood that has been modified through a process called acetylation.

Acetylation improves the durability, stability and lifespan of wood.

Ideal for exterior applications such as windows, doors, siding, patios and garden furniture.


Principle of Acetylation

After the change

Only natural wood components are added to the wood
A non-toxic and fully recyclable wood.
Modification to the heart of the wood
Can be cut or profiled without exposing unprotected surfaces
The acetylation process is irreversible
No risk of leaching/loss
Continuous performance improvement
Acetylation changes wood at the molecular level

Durability is achieved by preventing rot fungi from digesting wood, not killing them with toxins.

The hydroxyl groups of wood constituents such as cellulose are hydrophilic, resulting in wood swelling (and shrinkage when it loses water) and susceptibility to biological degradation agents.

Wood cellulose also contains hydrophobic acetyl groups, which occur naturally in small numbers. But there are too few in wood in its natural state to give it optimal durability and stability.

It is a reaction between wood and acetic anhydride (concentrated acetic acid) at high temperature to precisely increase the number of acetyl groups resistant to humidity.

Why choose Accoya?

The ecological part of the material and its durability

• FSC wood
• Very durable (50 years out of contact with the ground, 20 cm above the ground to be precise or 25 years)
• Low carbon solution (highly sought after in the RE2020). it stores more carbon (50 years lifespan) than it consumes (transport + acetylation)
• Non-toxic product. No leaching (unlike treated wood). We are on a Modified wood.

Stability / Material Quality

• No water retention in the wood, therefore no more shrinkage, swelling, deformations
• No chapping, cracks, splinters
• Ideal for exterior saturator/paint applications. No micro cracking of the finishes due to the absence of dimensional variations.
So the finishes last much longer than on other wood and the support is guaranteed for 50 years (in cladding).
Rhythm of the Maintenance of the extended facades
No deformations (shutters, handrails, etc.)

• Technical opinion on Cladding.
• Technical advice on the window. Best thermal performance compared to all wood species used in the window. There is very little water in the wood, so the conductivity is reduced.
• Document validated by the FCBA, for class 1 durability, and a biological risk class of 4
• FSC wood
• Environmental labels available on their site.
• No Toxic product (just a residual of 0.2% vinegar.)

Accoya® decking boards


Accoya® cladding