Moisture Resistant Drywall Vs Cement Board

Moisture Resistant Drywall vs. Cement Board: Essential Aspects

When building or renovating spaces exposed to moisture, choosing the right wallboard material is crucial. Moisture resistant drywall and cement board are two common options, each with unique properties that suit different applications. Understanding the essential aspects of each material will help you make an informed decision.

## Composition and Properties

Moisture Resistant Drywall:

As its name suggests, moisture resistant drywall is designed to withstand exposure to moisture. It consists of a gypsum core encased in water-resistant paper. The core is treated with additives that slow down water absorption, making it more resistant to mold and mildew.

Cement Board:

Cement board, also known as backer board, is made of Portland cement, sand, and fiberglass. It is denser and more rigid than drywall and highly resistant to moisture, mold, and fire. Cement board is typically used in areas where water resistance is paramount, such as bathrooms, showers, and kitchens.

## Durability and Longevity

Moisture Resistant Drywall:

While it is water-resistant, moisture resistant drywall is not waterproof. Prolonged exposure to water can damage the core and compromise its structural integrity. It is best suited for areas with moderate moisture levels, such as kitchens and laundry rooms.

Cement Board:

Cement board is highly durable and can withstand direct water exposure without compromising its strength. It is often used in high-moisture environments, such as showers and exterior walls. However, it is not completely immune to moisture penetration, and prolonged exposure to standing water should be avoided.

## Installation and Cost

Moisture Resistant Drywall:

Moisture resistant drywall is installed like regular drywall using screws or nails. It requires a mold-resistant primer and paint to enhance its water-resistance. The installation cost is comparable to regular drywall.

Cement Board:

Cement board requires specialized fasteners and thicker support framing due to its weight. It can be more difficult to cut and install than drywall. However, it often requires less finishing work, as it does not need to be primed or painted.

## Applications