The crawl space humidity lab.
Switch between a vented crawl space, closed vents, encapsulation and encapsulation with a dehumidifier, change how damp the soil is and watch the humidity and mold risk month by month. Free, with no signup.
- Twelve months
- Mold risk
- Free, no signup
Run a crawl space through the year
An illustration built from typical Middle Tennessee monthly weather and simple moisture rules. A real crawl space is measured with a hygrometer over time.
- Months above 60%
- Peak humidity
- Yearly average
- Wood moisture
Saved. It will travel with your estimate request below.
Six things that feed mold and rot.
Humid summer air
Warm, wet air comes in through vents and condenses on cool surfaces.
Wet soil
Bare dirt releases water vapor all day, all year.
Poor drainage
Liquid water adds to the humidity and soaks the soil.
Open vents
In a humid climate, vents bring in more moisture than they remove.
Cool ducts and pipes
They sweat, which wets insulation and wood.
No air movement
Still, damp air lets mold settle in.
Learn more about drying it out.
Crawl SpacesCrawl Space EncapsulationSeal out the humidity.
Crawl SpacesCrawl Space Vapor BarriersCover the dirt.
Crawl SpacesCrawl Space DehumidifiersKeep it under 60.
Crawl SpacesCrawl Space Drainage and Sump PumpsGet the water out first.
Crawl SpacesCrawl Space InsulationInsulate the right surface.
Crawl SpacesCrawl Space Repair and SupportFloors that stop bouncing.Crawl space questions
Can you fix a wet basement or crawl space?
Yes. We trace where the water comes from, then use drains, sump pumps, grading, sealing and dehumidifying as needed. Our Crawl Space Humidity Lab shows how each approach changes the humidity through the year.
Is crawl space encapsulation worth it in Tennessee?
In our humid climate, often yes. Sealing the crawl space with a heavy liner, closing the vents and adding a dehumidifier keeps humidity low, which reduces mold, rot, musty smells and pests. It costs more than a patch, and it treats the cause.
Want a dry crawl space?
A free estimate looks at your crawl space, measures the humidity and gives you a written plan and price.