Dry rot is the leading cause of damage in wood structures in the Pacific Northwest. Dry rot, which is sometimes called brown rot, wood rot, and wet rot, can lead to even more mold and mildew issues. This makes dry rot challenging to spot before it spreading—and nearly impossible to predict. As the fungi spread, they eat away at the wood, leaving it dark and crumbly. At that point, you can even crush the wood into small chips or powder with your bare hand. Unfortunately, once dry rot begins spreading within a structure, it doesn’t stop.