Poria Incrassata: A House Eating Fungus
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Poria Incrassata, a house eating fungus, can cause major damage.

Over the last 30+ years, Twin Home Experts has seen it all when it comes to homeowners in Los Angeles, CA Phoenix, AZ and Coeur D Alene, ID. Nothing beats the hidden, unforeseen damages and treatment expenses caused by the damage Poria Incrassata does to a home.

This is the real life blob that travels through a home, as fast as two inches inside your walls over 48 hours, until you wake up and see it bleeding through your walls, baseboards, shower pan, etc.

What causes Poria Incrassata to invade your home?

If any of the following conditions exist in your home, risks of dealing with this fungus are high:

  • Soil comes in contact with wood
  • Stucco has been installed below the soil grade
  • Siding extends below the soil grade
  • Crawl space ventilation problems – not done correctly, inadequate earth to wood clearance
  • Cracks in the perimeter foundation of the home and slab on soil grade allowing migration of rhizomorphs to reach wood
  • Planters placed against exterior wall with Poria contaminated soil
  • Ponding near the home due to sprinklers or other water sources
  • Excessive moisture near the home because of failure to slope soil
  • Failure to maintain proper clearance between landscaping and wood structure

All of these conditions can allow Poria Incrassata to enter the home’s structure.

Poria shows up mostly in southern states, and has been found elsewhere in the U.S., according to poriaincrassata.com. Some experts believe the forest dirts used by landscapers from around the world originally spread the mold to domestic homes.

We recently performed an entire Poria Incrassata treatment, removal, and rebuild of a home’s structure in Long Beach, CA. Here are some of the big takeaways from this poria invasion:

Proper clearances between wood and soil

Poria Incrassata thrives in wet conditions, so dehydration important. When it comes to construction, it’s imperative to prevent the rhizomorph from reaching the structure. A contractor should secure proper clearances between wood and soil to prevent Poria infestation.

Other actions should also be taking place upon construction:

  • Prevent wood from coming into contact with soil
  • Fix any cracks in the perimeter foundation on the soil grade
  • Check sprinklers and other sources of water – you do not want ponding near the home

We found a broken and leaking sewer line that was the source of the Poria growth along with numerous rhizomorphs – the root of Poria Incrassata.

The entire home’s wood subflooring structure was directly built on soil.

These two conditions, leak and wood/soil contact, were the perfect source for Poria.

It is so important to perform a periodic home inspection to your property, especially if you are on a raised foundation.