Wood rot often comes as an unpleasant surprise. Perhaps you’re having your roof shingles replaced and the roofer announces that the decking, rafters, and/or ridge board is rotted. Or maybe you’re preparing to paint an exterior window sill or trim board and you notice the wood under the old paint is soft. Worse is when you’re in the basement or crawlspace and notice rot in structural beams and joists!
Left untreated, with the right conditions, wood rot can spread and eventually weaken the structure of your home. Of course, a home with significant rot will also lose its resale value, so it’s imperative to take action. The fungal spores that cause wood to rot are all around us. Fortunately, they are not always active, and rot damage does not occur overnight. Dry rot is a common type of wood rot in which wood is attacked by fungi. The fungi destroy the parts of the wood that make it strong and firm.
To grow and begin to digest wood, fungal spores need adequate amounts of water and high relative humidity. When the moisture content of the materials with which your home is built is coupled with high relative humidity, the stage is set for rot.