Moisture and Humidity Testing
Wood and air tell the truth about a crawl space. We read relative humidity and temperature, measure moisture in joists and subfloor with a meter and map the wettest spots. The numbers show how serious the problem is and, after the work is done, whether it is fixed.
- MeasuresHumidity, temperature, wood moisture
- ToolsHygrometer and pin meter
- ResultA map of wet spots
- Follow-upRe-test after repairs
What is included
- 1Hard numbersHumidity and wood moisture recorded.
- 2A map of problemsWet spots marked and photographed.
- 3A baselineKnow where you started.
- 4Proof laterTest again after the work.
From the first call to a dry crawl space
Our partner experts repair and protect crawl spaces in cities across the country. Find yours below and ask for a free estimate.
- 1ReadWe measure air humidity and temperature.
- 2ProbeWood moisture is checked at many points.
- 3MapWet and dry areas are marked.
- 4ExplainWe show what the readings mean.
Is this the right service for you?
- A home with condensation on pipes or ducts
- A floor that feels damp or cold
- A crawl space with a musty smell
- Owners after a flood or a long wet season
Common questions
What humidity is too high?
Mold generally likes humidity above about 60 percent, so lower is better. We explain your readings.
Can wood be too wet?
Yes. Persistently wet wood invites rot and mold, and we measure it to know.
Can I test it myself?
A basic hygrometer helps. We use pro meters and read many points.
Services that pair with this one
Crawl Space Inspection and AssessmentA thorough look under your house, with photos, readings and a clear action plan.See the service 
Crawl Space Dehumidifier InstallationA dehumidifier made for crawl spaces, sized to the space and set to drain on its own.See the service 
Humidity Monitoring SystemsA small sensor that watches the crawl space and tells you when humidity drifts, before it becomes a problem.See the service Find your city
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Find out what is under your house.
Call or text, or send the form for your free estimate. Tell us what you notice, from smells and cold floors to water and sagging.