Also known as “brown rot”, this fungus will reduce the wood it feeds on into small, rectangular pieces, leaving a “red dust” of spores behind as it spreads.
While not quite as widespread as other forms of mold damage, dry rot results in severe structural damage to wood. According to a study originally published in the Official Journal of the International Biodeterioration and Biodegradation Society, a 1% decrease of the weight of wood can result in a 75% loss in the wood’s toughness, causing floor joists and girders to begin to crumble apart in a very short period of time.
Don’t be mislead by the name “dry rot” — it does need significant moisture (a minimum of 28-30% content within the wood).
Dry rot damage can be treated with fungicides (such as boric acid) or other mold treatments to eliminate problems. However, the best way to prevent dry rot and related fungi is to create a dry space.