What is Accoya wood?
You will not have heard of an Accoya tree, because they simply do not exist. Accoya wood begins life as a fast-growing pine tree called Radiata Pine which are grown in managed forests.
Once the tree has matured, the pine is harvested and the raw timber is introduced to a modification process as a plank or beam, the so-called acetylation process using acetic acid. This process creates extremely dimensionally stable and durable wood1.
Accoya Wood Applications
As mentioned, the chemical modification makes the wood more durable, and therefore, Accoya wood is mainly used for exterior applications such as doors, windows, and garden decking.
Osmo Wood Finish for Accoya
Accoya wood is well known to Osmo UK. Treatment with Osmo coatings is possible without restrictions, however there are two notes for consideration before application.
Consideration 1: Interiors
For interior usage, we would not recommend using Accoya wood. This is due to the modification is has a long lasting and intensive smell of acetic acid.
Consideration 2: Exteriors
For exterior usage, it is very important to note that despite the modification, Accoya wood is not protected against attack with discolouring blue stain fungi. Therefore, we generally recommend a pre-treatment with Osmo WR Base Coat before applying any one of the exterior Osmo products.
References
1. accoya.com