The Dry Rot Fungus (Serpula lacrymans) is white mycelium; rust-orange fruiting bodies; rust-red spore dust and typically measures Microscopic hyphae; fruiting bodies can reach 12+ inches across. True dry rot (Serpula lacrymans) is widely considered the most destructive wood-decay fungus in buildings. Despite its name, dry rot requires moisture to grow — but it is uniquely capable of transport.

Yes — the Dry Rot Fungus is considered a high-risk pest. Catastrophic structural failure. Unique ability to spread through masonry and plaster to attack dry wood. Can cause complete destruction of floor systems, wall framing, and roof structures. One of the most expensive building defects to remediate.

In Arizona, dry rot funguss are most often encountered in the following situations: Brown, cubically cracked wood (similar to brown rot but more severe). White cotton-like mycelium on wood surfaces. Rust-orange pancake-like fruiting bodies with white margins. Rust-red spore dust. Musty, mushroom-like odor. Decay spreading to apparently dry wood away from moisture source.

The Dry Rot Fungus is most active during: Year-round wherever moisture is present; spreads to dry areas via rhizomorphs. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Eliminate all moisture sources. Ensure proper ventilation of crawl spaces and subfloor areas. Fix all plumbing leaks immediately. Use pressure-treated wood in moisture-prone areas. Regular professional inspections of older buildings.

Professional remediation required. Eliminate moisture source. Remove all infected wood plus a safety margin of apparently sound wood. Treat masonry with fungicide. Apply borate preservatives to all remaining wood. Structural replacement of all affected members.

Most standard homeowner's insurance policies exclude damage caused by fungi, rot, and gradual deterioration. Early detection and remediation are critical to limiting repair costs. Pest Control Bros can inspect for dry rot fungus and recommend moisture control and treatment options before damage becomes extensive.