Can drywall be used in areas where water and moisture are expected, such as bathrooms and kitchens? Can it be used for exterior surfaces exposed to the elements?
Drywall, also known as gypsum board, is becoming increasingly popular in construction. It’s indispensable in prefab buildings, dry construction methods, various partition walls, and attics. You’ll find it in almost every public building today, and it’s also widely used in private homes and apartments. However, one of the most common questions is whether drywall can withstand moisture.
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This concern isn’t unfounded. When exposed to moisture, drywall can quickly deteriorate. Like a sponge, it absorbs water, warps, becomes brittle, and its paint peels off. This can happen in attics, for instance, due to minor leaks, or if you forget to close a skylight and the drywall around the window absorbs rainwater in just a few minutes.
In such cases, repairs are sometimes possible, but often the only solution is to replace the drywall. Additionally, in partition walls, moisture can occur due to temperature differences between two rooms and inadequate insulation, leading to drywall damage.
Given these issues, the question arises: Can drywall withstand moisture? The short answer is yes. Drywall can be installed in areas with high moisture levels, but you must choose the right type of drywall for the job. Moisture-resistant drywall, often used in kitchens, bathrooms, and basements, has cores treated with additives that prevent moisture absorption. It can even be used as a base for ceramic tiles.
Moisture-resistant drywall is usually easy to identify because it’s typically green and stamped with its intended purpose. It’s important to note that there are both moisture-resistant and water-resistant drywall options, and their application depends on the level of exposure to water.
In some cases, exposure to water may be incidental (such as leaks or flooding), but drywall with adequate water resistance is also used for exterior surfaces. In these situations, where water exposure can be significant and prolonged, the drywall is finished with exterior-grade paint for additional protection.
When it comes to private homes, it’s always advisable to consult with a professional to determine which type of drywall is best suited for your project. The type of drywall used for surfaces exposed to high humidity, such as a kitchen partition wall, will differ from what’s used for a bathroom partition or exterior surfaces.
The key takeaway is that drywall can be installed in areas with water and moisture, but professional advice is essential to ensure the best results.
INFO: USG Corporation