About Accoya Wood

Accoya is the world's leading high technology wood. Created from sustainably sourced softwood, Accoya matches or exceeds the durability, stability and beauty of the very best tropical hardwoods.

Accoya is New Zealand grown Radiata Pine which has undergone a propriety acetylation process to produce a revolutionary timber product. This acetylation process alters the physical properties of the wood by transforming free hydroxyl groups (molecules that readily absorb and release moisture) in the timber into acetyl groups. The process is done at a purpose-built facility in The Netherlands.
The result is a durable, stable timber that equals or surpasses the leading timbers. Better still, the whole process does not add any toxic chemicals.
How is it made?
The Accoya wood production process takes sustainably-sourced, fast growing softwood and, in a non toxic process, creates a durable and stable wood. You may remember hardening ‘conkers’ with vinegar as a child; this process works in much the same way.

The technology behind Accoya is based on acetylation, a process that has been studied by scientists around the world for more than 75 years. This method of improving wood has been proven to deliver such superior performance that it has long been used as the “gold standard” against which other methods are measured.

Acetylation effectively changes the free hydroxyls within the wood into acetyl groups. This is done by reacting the wood with acetic anhydride, which comes from acetic acid. When the free hydroxyl group is transformed to an acetyl group, the ability of the wood to absorb water is greatly reduced, rendering the wood more dimensionally stable and, because it is no longer digestible, extremely durable.

Timber name:
Pinus radiata or Radiata Pine.

Growth to full maturity:
20-25 years

Location of growth:
New Zealand.

Estimated lifespan in external joinery:
60 years+ Please note that this figure would be based on sensible coating cycles and good maintenance.

Quality of paint finish:
Exceptionally good, little grain visible.
This unique chemical modification process transforms the timber into Accoya Wood.