What is a normal moisture reading for drywall?

Drywall is a common building material made of gypsum plaster sandwiched between two sheets of paper. Since it is hygroscopic, it can absorb moisture from the air. Excessive moisture can lead to various problems, including mold, mildew, and structural damage. Therefore, it is important to monitor the moisture content of drywall to ensure that it remains within acceptable levels.

The normal moisture reading for drywall varies depending on the specific type of drywall and the environmental conditions in which it is installed. However, as a general rule of thumb, the moisture content of drywall should not exceed 15%. Readings above this level may indicate the presence of excessive moisture, which should be investigated and addressed promptly.