Moisture Content Varies by Drywall Type

Determining the normal moisture content for drywall is crucial, especially when assessing potential moisture damage or installing new drywall. Different types of drywall have varying moisture levels, which can impact their performance and longevity.

Moisture Variation

Regular Drywall:

Moisture content typically ranges from 5% to 12%.

Greenboard Drywall:

Designed for moisture-prone areas (bathrooms, kitchens).
Contains an increased amount of moisture-resistant additives.
Moisture content may be higher than regular drywall (up to 15%).

Mold-Resistant Drywall:

Treated with antimicrobial agents to resist mold and mildew.
Moisture content generally similar to regular drywall (5%-12%).

Moisture-Resistant Drywall:

Specially formulated to withstand high moisture levels.
Specifically manufactured for wet areas (showers, laundry rooms).
Moisture content may range from 10% to 18%.

Impact on Performance

Excessive moisture content in drywall can lead to problems such as:

Warped and buckled drywall panels
Mold growth
Structural damage

Measuring Moisture Content

Measuring moisture content is essential for evaluating drywall condition. It can be done using a moisture meter:

Place the meter’s pins into the drywall.
Read the moisture content percentage displayed on the meter.