Acceptable Moisture Levels

Moisture Mapping involves using a moisture meter to measure the amount of moisture in building materials, particularly walls. Acceptable moisture levels vary depending on the type of material and its intended use.

• For wood framing, acceptable moisture levels range from 8% to 12%.
• For drywall, acceptable moisture levels are between 0% and 10%.
• For concrete walls, acceptable moisture levels fall between 4% and 8%.

What should moisture readings be for internal walls?

Moisture readings for internal walls should typically be:

• Below 15% for gypsum wallboard
• Below 25% for plaster and lath
• Below 16% for wood framing

Higher moisture readings may indicate the presence of moisture problems, such as leaks, condensation, or water damage. It’s essential to investigate and address these issues promptly to prevent further damage to the building.