Extensive laboratory and field testing has shown the performance of acetylated wood to be extremely reliable. It provides a factory warranty of 50 years above ground, or 25 years when exposed directly to freshwater or in contact with ground.
Accoya® treated wood has been thoroughly tested for dimensional stability, durability, paint retention and in-ground conditions to ensure optimal performance. Indeed, it is so reliable that for many years it has been – and continues to be – used by scientists as the benchmark against which other treatments and modified timbers are measured.