The resistance of high acetyl solid timber (Accoya) and medium density fibreboard (Tricoya) to attack by wood-destroying fungi and termites was investigated under both laboratory and field conditions. Laboratory studies were conducted in Japan, New Zealand and USA. Field studies were conducted in Australia, Japan, New Zealand, Thailand and UK. The results of the laboratory and field studies against decay fungi support previously published work showing that high acetyl timber is highly resistant to attack by wood destroying fungi. The laboratory and field studies against termites have improved knowledge of the resistance of acetylated wood to attack by termites; it has been demonstrated that Accoya is highly resistant to attack by two species of the highly destructive Coptotermes genus. It would be expected that Accoya would exhibit excellent long-term performance against wood destroying fungi and termites in most regions in the world.

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