There are two ways to specify treated wood – 1. by referring to the British Standard BS8417 or 2. by using the Wood Protection Association (WPA) commodity code system : Option 1: Using reference to the British Standard The British Standard for wood preservation is BS8417. This code of practice defines treatment by preservative penetration…
Wood Natural durability classifications are based on the woods ability to resist degradation to wood destroying fungi. Wood destroying fungi and insects are the most significant threats to wood or timber durability in the UK. Insects tend not to be a serious risk in the UK as wood destroying insects prefer the warmer climates, e.g….