Poria incrassata, often referred to as the “house-eating fungus,” is a particularly destructive type of brown rot fungus.
Known for its rapid growth and devastating impact on wooden structures, it poses a significant threat to homes and buildings.

This fungus is notorious for its ability to transport water over long distances through structures called rhizomorphs.
These root-like structures can extend several feet, allowing the fungus to access and infect wood from a remote moisture source.
The major characteristics of Poria Incrassata are its rapid growth, the rhizomorphs that it forms and crumbly, brittle structure that it leaves behind. It has the ability, under the right conditions to spread rapidly through wood causing extensive damage in a short period of time. The rhizoomorphs that are formed enable the fungus to transport both water and nutrients facilitating in its spread. Like other Brown Rot fungi, Poria Incrassata breaks down cellulose and hemicellulose, leaving behind a brittle and crumbling piece of wood.
Poria Incrassata can cause severe structural damage to a building.
As it consumes the wood, the structure weakens, increasing the risk of collapse. Signs of a Poria Incrasatta infestation include the brownish or redish discoloration of the wood, a distinctive earthy smell, the visibility of black stringy structures that resemble roots and the presence of the small cubical pieces of brittle wood.

Preventing a Poria incrassata infestation involves creating an inhospitable environment for the fungus. This includes controlling the moisture in and around the wood by taking action to repair any leaks as well as preventing any water intrusion. You must ensure proper and adequate airflow throughout crawl spaces and basements. It is imperative to conduct regular inspections checking for signs of wood decay.
If you suspect a Poria incrassata infestation, it’s crucial to seek professional help. Treatment typically involves eliminating the source of the moisture, removal of the infected wood by cutting it out and replacing it and possible the application of specialized fungicides to prevent a re-infection.
Due to the complex nature of Poria incrassata infestations and the potential for extensive damage, it’s essential to work with experienced professionals who understand the fungus and its behavior. Early detection and prompt action are key to mitigating the damage caused by this destructive organism.
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Jasper, Poria incrassata Can Eat Your House!
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