Definition of dry rot

The term "dry rot" was coined in the mid-19th century to describe a fungal decay that occurs in damp environments but appears dry to the touch due to the lack of visible moisture. The fungus responsible for dry rot, Serpula lacrymans, thrives in conditions of high humidity and low oxygen levels, which are often found in poorly ventilated buildings with high moisture content. The fungal strands, known as hyphae, spread quickly through porous building materials such as timber and plaster, causing them to decompose and weaken. This can lead to significant damage to structures, making "dry rot" a serious concern for builders and property owners alike. The use of the term "dry" in the name is somewhat misleading, as while the rot appears dry to the touch, it is caused by fungal activity that requires moisture to thrive.