Knowledge Base

What is the difference between dry rot and wet rot?

Both, wet and dry rot, are caused by aggressive fungal decay. 

Wet rot tends to develop on lumber at a higher moisture content than dry rot. To flourish, both forms of rot require higher moisture content than normal timber that has a moisture content below 19%. 

Outbreaks of dry rot and wet rot start in similar ways. 

Wet rot occurs more frequently, but is less serious; decay is typically confined to the area where timber has become and remains wet.

Dry rot is wood decay caused by certain species of fungi that digest parts of the wood which give the wood strength and stiffness. Dry rot is the more serious form of fungal decay in a wooden structure.