10% of all wood produced in the US is used to replace wood that has decayed. We aren’t talking about insect damage or UV damage, wood decay is caused solely by fungi. Fortunately, it’s preventable. Fungi needs four things to survive – water, oxygen, a food source, and a correct temperature window. If you remove one of these, fungi cannot survive and decay will not take place. Of these, water is the easiest thing to take away. Dry wood will not support fungi that cause decay. Inspectors should know the most common locations for wood decay as well as ways to identify decay and distinguish it from damage caused by insects. For more information, check out our new article on wood decay.