Consequences of Excessive Drywall Moisture

What is a normal moisture reading for drywall?

Drywall, also known as plasterboard, is a common building material used for constructing walls and ceilings. It is composed of gypsum, water and other additives. The moisture content of drywall is typically between 6% and 12%. This range is ideal, as it allows the drywall to be workable yet strong enough to withstand the stresses of construction and use.

However, when the moisture content of drywall exceeds 12%, it can lead to a number of problems, including:

• Warping: Excessive moisture can cause the drywall to warp or buckle, as the gypsum expands and softens.
• Mold growth: Mold thrives in damp environments, and drywall with excessive moisture can provide an ideal breeding ground.
• Mildew: Mildew is another type of fungus that can grow on damp drywall, causing discoloration and a musty odor.
• Loss of strength: Excessive moisture can reduce the strength of drywall, making it more susceptible to damage.
• Structural damage: In severe cases, excessive drywall moisture can lead to structural damage, as the drywall can become weak and unstable.

Therefore, it is important to monitor the moisture content of drywall and take steps to prevent it from becoming excessively moist.