Moisture Mapping is a crucial process in evaluating the health of a building’s envelope, ensuring structural integrity and occupant well-being. This technique involves using specialized equipment to measure and map moisture content within various building materials, including drywall.

Acceptable Moisture Levels in Drywall

• 0% to 15%: Dry and acceptable
• 15% to 20%: Slightly elevated, may indicate minor moisture intrusion
• 20% to 25%: Moderate moisture presence, further investigation required
• 25%+: Excessive moisture, immediate action necessary

What is a Normal Moisture Reading for Drywall?

Acceptable moisture levels for drywall vary depending on the environment. In general, a relative humidity level of 30% to 50% is ideal for indoor drywall. At this level, drywall absorbs minimal moisture, maintaining its structural integrity and preventing mold growth.

Moisture readings above 15% may indicate water intrusion, leaks, or condensation. Addressing these issues promptly is crucial to prevent further damage and preserve the structural integrity of the building.