Moisture Readings in Gypsum Wallboard vs Plaster Walls

Moisture readings provide valuable insights into the health and integrity of your walls. When measuring moisture content, distinct differences exist between gypsum drywall and traditional plaster walls, and it’s crucial to understand these variations for proper assessment and maintenance.

Gypsum Wallboards

• Typically contain less moisture than plaster walls.
• Ideal moisture readings typically range between 0% to 15%.
• Readings above 15% may indicate moisture issues that require attention.

Plaster Walls

• Generally retain more moisture than gypsum drywall.
• Appropriate moisture readings usually fall within 5% to 15%.
• Readings exceeding 15% potentially signify excessive moisture and possible structural concerns.

What Should Moisture Readings Be for Internal Walls?

Internal walls, whether gypsum or plaster, should ideally have moisture readings within the following ranges:

Readings outside these ranges may suggest moisture problems that warrant further investigation and remediation. Timely detection and resolution of excessive moisture can prevent costly repairs and ensure a healthy living environment.