## Understanding Moisture Mapping Moisture mapping is a process of measuring and documenting the moisture content of various materials within a building. This information is used to identify areas where moisture may be present, which can lead to a variety of problems, including mold growth and structural damage. ## Acceptable Moisture Levels for Drywall Drywall is a very durable material, but it can be damaged by excessive moisture. Acceptable moisture levels for drywall vary depending on the specific type of drywall and the climate. In general, moisture levels should not exceed 15% for most types of drywall. ## At What Moisture Level Does Mold Grow in Drywall? Mold can begin to grow on drywall at moisture levels as low as 60%. However, the optimal conditions for mold growth are moisture levels between 70% and 90%. ## Consequences of Mold Growth in Drywall Mold growth in drywall can have a number of negative consequences, including: - Structural damage to the drywall - Staining and discoloration of the drywall - Unpleasant odors - Health problems, such as allergies and asthma ## Preventing Mold Growth in Drywall The best way to prevent mold growth in drywall is to keep moisture levels low. This can be done by: - Ensuring proper ventilation in your home - Using a dehumidifier in humid climates - Repairing any leaks or water damage immediately - Installing a vapor barrier behind drywall in areas where there is a high risk of moisture