What primarily causes dry rot?

Dry rot is primarily caused by excessive moisture, which creates an environment conducive to the growth of specific fungi in wood. This type of decay occurs when wood becomes damp, allowing wood-destroying fungi to thrive. These fungi break down the cellulose and lignin in the wood, leading to structural damage and weakening of the material. Dry rot can spread rapidly if the moisture problem is not addressed, often resulting from issues such as plumbing leaks, poor drainage, or high humidity levels.

Other factors, while they can influence conditions in which wood rots, do not directly lead to dry rot. Extreme heat may lead to other types of decay or insect infestations, while cold temperatures and dry air typically help inhibit the growth of rot-causing fungi. Understanding the significance of moisture control is vital for preventing the occurrence of dry rot and maintaining the integrity of wooden structures.