Can You Waterproof Drywall For Shower

Drywall is a commonly used material in bathroom building, but it can be susceptible to water damage when exposed to water. Most people complain of water damage, mold, and rot on the drywall in the shower. This is why waterproofing your drywall is essential when installing a shower.

In this comprehensive guide, we will discuss the steps and materials needed to waterproof your drywall for a shower, ensuring that your bathroom stays dry and mold-free.

Can You Waterproof Drywall For the Shower?

Yes, drywall can be waterproofed for use in a shower by using a waterproofing compound or membrane, such as a waterproof drywall compound or a liquid-applied membrane. It is also recommended to install a waterproof green board instead of regular drywall. Proper installation and sealing of all joints and seams are crucial for a successful waterproof drywall installation in a shower.

Why is Waterproofing Drywall Important for Showers?

Drywall is a porous material that can easily absorb moisture and water, leading to mold growth, distortion, and other structural damage.

When used in a shower area, proper waterproofing is essential to protect the drywall and prevent costly repairs down the road.

In addition, a waterproofed shower area will also provide a more hygienic and comfortable showering experience.

What is Waterproof Drywall?

Waterproof drywall, also known as green board or cement board, is a type of drywall that is designed to withstand moisture and humidity.

Unlike traditional drywall, which is made of gypsum and paper, waterproof drywall is made of a mixture of cement, water, and other materials. This unique composition makes it resistant to water, mold, and mildew, making it the ideal choice for showers, bathroom walls, and other areas prone to moisture.

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Benefits of Waterproof Drywall

There are several benefits to choosing waterproof drywall for your shower, including:


Waterproof drywall is a highly durable material that can withstand the daily wear and tear of a shower. It is also resistant to moisture, mold, and mildew, ensuring that it will last for many years to come.

Water Resistance:

One of the biggest benefits of waterproof drywall is its ability to resist water. This makes it the perfect choice for showers, as it will not absorb water, preventing mold and mildew growth.

Ease of Installation:

Unlike other types of bathroom materials, waterproof drywall is relatively easy to install. It can be cut and drilled just like traditional drywall, making it a convenient option for homeowners who want to tackle the project themselves.


Waterproof drywall has a sleek and modern look that can enhance the overall aesthetic of your bathroom. It is also available in a variety of colors and textures, allowing you to find the perfect match for your shower.

How Do You Waterproof Your Shower Walls?

To waterproof shower walls, it is recommended to use waterproof wallboard instead of drywall. A cement board is a popular option, or you can use panels made of extruded polystyrene foam. These materials provide a more durable and efficient solution compared to attempting to waterproof drywall.

Companies also offer shower kits that include the waterproof wallboard and all necessary materials for the job, making the installation process quicker and easier.

Can You Use Regular Drywall in a Shower?

Never use conventional drywall as the wall material for building or replacing shower walls. Standard drywall is not only inadequate for shower surrounds, but it is also not rated for use in bathrooms. Instead, for your shower walls, utilize a waterproof backing board. Then, for the ceiling and remaining walls in the bathroom, use moisture-resistant drywall (green in color).

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What Kind of Drywall Do You Use for Shower Walls?

If you must use drywall for your shower walls, make it water-resistant and cover it with a glue-on waterproof membrane. However, using a real waterproof backer board instead is easier and more durable.

Can I tile over the Drywall in the shower?

No, tiling over regular drywall in a shower is not recommended. Regular drywall is not designed to withstand moisture exposure in a shower and can lead to mold and structural issues. Use a waterproof backing board specifically designed for use in showers as a substrate for tiling.

Can RedGard Be Used On Drywall To Waterproof Shower Walls?

Yes, RedGard can be used on drywall to waterproof shower walls. It is a waterproofing and crack-prevention membrane commonly used in wet areas such as showers, bathtub surrounds, and steam rooms.

It can be applied directly over drywall, concrete, and other substrates, providing a long-lasting solution to prevent water damage and mold growth in wet areas.

Additionally, RedGard can also be used as a crack isolation membrane, helping to prevent cracks in the underlying substrate from affecting the finished surface.

Is Redgard Toxic?

RedGard is not considered toxic, but it should be handled with care and according to the manufacturer’s instructions and safety guidelines.

The product contains ingredients that can irritate the eyes, skin, and respiratory system, so proper protective equipment such as gloves, eye protection, and a respirator should be used when handling it.

Additionally, RedGard should not be ingested, and ventilation should be provided during application to minimize inhalation of fumes. Always refer to the product label and safety data sheet for information on the safe handling and use of RedGard.

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Can I Tile Over Regard?

Yes, you can tile over RedGard. After the RedGard membrane has fully cured, you can install ceramic, porcelain, or natural stone tiles directly over it using a suitable tile adhesive.

RedGard provides a smooth, flat surface for tile installation and helps to prevent water damage and mold growth behind the tiles.

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