Moisture is the real problem
Mold on floor joists and subfloor is extremely common in humid Triad crawl spaces. It's a symptom of moisture.
Why it grows
Humidity above roughly 70% for extended periods, condensation on cool wood, and wet insulation create ideal conditions.
What to do
- Measure humidity and wood moisture
- Fix moisture sources
- Clean or treat affected wood
- Remove contaminated insulation
- Encapsulate or install a vapor barrier and dehumidifier
Related Crawl Space Topics
EncapsulationVapor BarrierDehumidifiersDrainage & Sump PumpsStructural RepairMold & Insulation RemovalMusty SmellSagging FloorsStanding WaterCost Guide
Frequently Asked Questions
Does crawl space mold affect the house?
Air from the crawl space can move into the living space, so it can affect indoor air quality.
Will mold come back after treatment?
If moisture isn't controlled, yes.
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