Biological growth on floor joists/girders in crawlspace
There is biological growth on the floor joists or girders in the crawl space.
Less commonPlan for itFloor framing
Why it matters
It usually comes from high moisture in the crawl space. Left alone, the growth can spread and the wood can deteriorate.
How common is it?
Didn't come up in the homes HomeCloud evaluated Sep 2025 to Oct 2026, but it's on our list of foundation and structure findings.
Counted by the finding's name on HomeCloud reports, so the true number can be a little higher.
How soon to fix it
HomeCloud reports list this as something to plan for rather than an emergency.
More foundation and structure resources
Foundation cracks: which ones to worry aboutHow to tell normal shrinkage cracks from settlement, track a crack over time and know when to call a structural engineer.Crawl space basics: moisture, vents and vapor barriersWhat a healthy crawl space looks like, vented vs. sealed crawl spaces, and where vapor barriers, dehumidifiers and encapsulation fit in.Termites when you're buying a homeWhat bait stations and drilled holes mean, how North Carolina's termite report works, what to ask the seller and what treatment involves.
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