Consequences of Excessive Drywall Moisture

Drywall is a common building material used in the construction of interior walls and ceilings. It is composed of gypsum plaster sandwiched between two sheets of paper. The normal moisture content of drywall is between 6% and 8%. When drywall is exposed to excessive moisture, it can cause a number of problems, including:

Structural Damage

Excessive moisture can weaken drywall and cause it to sag or collapse. This can be a serious hazard, especially in ceilings.

Mold Growth

Drywall is a food source for mold. When drywall is exposed to moisture, it can provide an ideal environment for mold to grow. Mold can cause health problems, such as respiratory infections and allergies.

Corrosion

Excessive moisture can also cause metal components in the wall, such as nails and screws, to corrode. This can weaken the wall and make it more susceptible to damage.

How to Prevent Excessive Drywall Moisture

There are a number of things that can be done to prevent excessive drywall moisture, including:

• Controlling the humidity in your home. The ideal humidity level for a home is between 30% and 50%. You can control the humidity in your home by using a dehumidifier.
• Fixing leaks promptly. Leaks in your roof, plumbing, or other areas of your home can lead to excessive drywall moisture. It is important to fix leaks as soon as possible to prevent damage.
• Using a vapor barrier. A vapor barrier is a material that is placed between the drywall and the insulation to prevent moisture from migrating from one to the other. Vapor barriers are typically made of plastic or foil.

What is a Normal Moisture Reading for Drywall?

The normal moisture content of drywall is between 6% and 8%. You can measure the moisture content of drywall using a moisture meter. If the moisture content of drywall exceeds 12%, it is considered to be excessive.