Wood Decay Fungi

Some people term this as “dry” rot. There is no such thing as “dry rot”. All wood must have moisture of over 20% in order for wood decay fungi to attack. We have three types of fungi in this area.

White Rot: This fungus gives the wood a white bleached appearance. The wood eventually turns spongy and is stringy when broken.

Brown Rot: This fungus gives the wood a brown appearance and the wood breaks into cubical shaped pieces when broken.

Water conducting fungi: (Poria) This fungus is not very common in this area, but when seen, looks like a white fan with dirty white to black roots that can conduct moisture back to the wood up to twenty five feet away.

The control of wood decay fungi is to find the source of moisture and correct it. Then the decaying wood can be replaced. The most common area for wood decay in a home is at the bottom of a wood door frame of an exterior door. Once the paint starts to fail, water invades the wood, and as soon as the moisture content exceeds 20% the wood decay fungi begin to grow.