Posted on December 5, 2023
Imagine this homeowner’s nightmare: you spot an unusual, orange-hued growth in your house that stubbornly reappears despite meticulous cleaning. Upon investigation, you open a wall only to uncover a pervasive fungal infestation, transforming the sturdy wood of your home into a mushy disaster. This fungus, identified as meruliporia incrassata or “Poria,” is not your typical mold—it spreads rapidly and doesn’t seem reliant on immediate moisture sources.
Poria, with its mushroom-like bodies, is infamous as “the most devastating wood-decay fungus of houses” and labeled as “the most destructive fungus.” What sets it apart is the presence of rhizomorphs, described by Liz Keefer, a certified mold inspector, as “long arms or tentacles” that can extend up to 10 meters, relentlessly seeking nutrients and moisture. Unchecked, Poria can render a house uninhabitable at a staggering pace, advancing its rhizomorphs up to 10 inches per day.
The silver lining is that, while Poria can inflict significant damage, it takes time. Detecting and treating it promptly can still save your home. To understand and combat this “house-eating” fungus, it’s crucial to identify it and take necessary steps.
Poria’s prevalence varies across the United States, with coastal areas, particularly the Southeast, facing higher instances. This brown rot fungus devours wood cellulose, leaving behind dark, crumbly lignin. Identifying Poria relies on spotting its root-like rhizomorphs, often hidden behind walls and capable of infiltrating unsuspected areas.
Upon suspecting a mold issue, swift action is paramount. Professional mold testing is advised before remediation. An inspection helps locate the moisture source, vital for successful mold removal. Since Poria can spread rapidly, extensive demolition might be necessary to eliminate affected wood and trace the fungus’s entry point.
Preventing Poria is the best strategy. Proactive measures, such as directing rainwater away from foundations and monitoring indoor humidity, help avoid excess moisture. Vigilance is crucial in spotting signs like wall discoloration, musty odors, warped wood, bubbling paint, or soft wood. Being aware of your home’s condition is key. If you suspect Poria, don’t panic, but act swiftly.