Physical Signs of Moisture

How to Check for Moisture Under My House?

Moisture beneath your home can cause various problems, including mold, rot, and structural damage. In order to prevent and address such complications, it's crucial to know how to check for moisture under your house.

Exterior Signs

Foundation cracks: Moisture seeping through cracks in the foundation may indicate water leaks or poor drainage.
Efflorescence: White or crystalline deposits on basement walls or crawl spaces can indicate moisture absorption.
Damp soil: Soil around the perimeter of your house should be dry. Wet or damp soil may suggest poor drainage or leaks.
Pooling water: Standing water near the foundation or in low-lying areas could contribute to moisture problems.

Interior Signs

High humidity: Moisture levels in your home should be between 30-50%. Higher levels could indicate excess moisture.
Condensation on windows and pipes: Condensation on windows or cold surfaces may indicate high humidity levels.
Mold growth: Mold thrives in damp environments. Its presence in your basement or crawl space is a clear sign of moisture problems.
Musty odor: A musty or earthy smell in your home could indicate mold growth or moisture issues.

Additional Tips

Use a moisture meter: Moisture meters can measure the moisture content in building materials, providing accurate data on moisture levels.
Check crawl spaces and basements regularly: Ensure these areas are well-ventilated and free of excess moisture.
Address water leaks promptly: Repair any leaks in plumbing, roofing, or gutters to prevent moisture problems.
Improve drainage: Ensure gutters and downspouts are clean and direct water away from your home. Consider installing French drains if needed.
Use a dehumidifier: Dehumidifiers can help reduce humidity levels in your home, which can help prevent moisture issues.

Remember, if you suspect moisture problems under your house, it's essential to seek professional assistance from a qualified inspector or contractor to determine the source of the moisture and recommend appropriate solutions.