Moisture Mapping Understanding Acceptable Moisture Levels

Acceptable Moisture Levels

Maintaining the appropriate moisture levels in your home or building is crucial for a healthy living environment and can help to prevent moisture-related issues such as mold growth and structural damage.

• Relative Humidity (RH): Acceptable RH levels indoor range from 30% to 50%. Higher RH can lead to condensation and mold growth, while lower RH can cause dry skin and respiratory problems.


• Wood Moisture Content: For wooden structures, moisture content levels between 6% and 12% are generally considered acceptable. Higher moisture content can lead to rotting and structural instability.

What is a Bad Moisture Reading?

Readings that fall outside the acceptable ranges can indicate potential moisture problems:

• RH over 50%: This can lead to condensation, mold growth, and other moisture-related issues.


• Wood Moisture Content over 12%: Indicates excessive moisture, which can weaken the wood and promote rot and decay.


• Concrete Moisture Content over 8%: High moisture in concrete can cause efflorescence, cracking, and other problems.

Bad moisture readings should be addressed promptly to mitigate potential damage and ensure a healthy environment.