What Kind of Drywall Is Best for a Bathroom?

AvatarByAlison Socha Bathroom Fixtures & Surfaces

When it comes to remodeling or building a bathroom, choosing the right materials is crucial for creating a space that is both beautiful and durable. One of the most important decisions involves selecting the appropriate drywall, as bathrooms are exposed to high humidity and frequent moisture. Using the wrong type of drywall can lead to mold, mildew, and structural damage, turning a simple renovation into an expensive headache.

Understanding what kind of drywall works best in a bathroom environment is essential for ensuring longevity and maintaining a healthy indoor atmosphere. Different drywall options offer varying levels of moisture resistance, mold prevention, and ease of installation. By exploring these choices, homeowners and builders can make informed decisions that protect their investment and enhance the overall functionality of the space.

In this article, we’ll delve into the key factors that influence drywall selection for bathrooms, highlighting the benefits and limitations of each type. Whether you’re tackling a small powder room or a full bathroom remodel, knowing which drywall to use will help you achieve a lasting, moisture-resistant finish that stands up to the unique challenges of this wet environment.

Types of Drywall Suitable for Bathrooms

Bathrooms require drywall that can withstand high humidity and occasional water exposure. Standard drywall is not suitable because it absorbs moisture, leading to warping, mold growth, and deterioration. Instead, specialized drywall types designed for wet environments should be used.

Green board drywall, also known as moisture-resistant drywall, features a wax-coated paper facing that makes it more resistant to moisture than regular drywall. It is often used in bathrooms but is not recommended for areas with direct water exposure such as shower enclosures.

Cement board is a popular choice for wet areas. It is made from a mixture of cement and reinforcing fibers, making it highly water-resistant and a good substrate for tile installation in showers and tub surrounds.

Fiberglass-faced drywall offers enhanced moisture resistance due to its fiberglass mat facing instead of paper, which resists mold and mildew growth better than traditional drywall.

Mold-resistant drywall contains additives that inhibit mold growth, making it a good option for bathrooms, especially in poorly ventilated spaces.

Drywall Type Moisture Resistance Best Use Limitations
Green Board Moderate Bathroom walls outside shower/tub areas Not suitable for direct water contact
Cement Board High Shower walls, tub surrounds, wet areas Heavier, requires special fasteners
Fiberglass-faced Drywall High Bathroom walls with high humidity More expensive than standard drywall
Mold-resistant Drywall Moderate to High General bathroom walls, especially in low ventilation Not waterproof, only mold-inhibiting

Installation Considerations for Bathroom Drywall

Proper installation is critical to maximize the effectiveness of moisture-resistant drywall in bathrooms. Regardless of the drywall type chosen, attention to detail during installation can prevent water damage and mold growth.

Before installing drywall, ensure the bathroom is well-ventilated to reduce humidity buildup. Installing an exhaust fan that vents to the outside is essential.

When working with cement board, use corrosion-resistant screws designed for cement board fasteners. Fasten the panels securely to the studs without leaving gaps. Sealing joints with waterproof tape and thin-set mortar will improve water resistance.

For green board or mold-resistant drywall, use moisture-resistant joint compounds and primers. Avoid using paper tape in wet areas; instead, use fiberglass mesh tape which is less susceptible to mold.

All drywall edges and corners near wet areas should be sealed with a waterproof sealant to prevent water infiltration behind the wall surface.

Additional Protective Measures for Bathroom Walls

In addition to selecting the right drywall, consider supplementary protective measures to extend the lifespan of bathroom walls.

  • Waterproof Membranes: Applying a waterproof membrane behind tile installations adds an extra layer of protection against moisture penetration.
  • Vapor Barriers: Installing a vapor barrier on the warm side of the wall cavity helps control moisture migration into the drywall.
  • Tile and Paint Selection: Use water-resistant tile and grout for shower surrounds, and moisture-resistant paints on drywall surfaces outside wet zones.
  • Regular Maintenance: Inspect caulking and grout periodically to repair cracks or gaps that could allow water intrusion.

By combining moisture-resistant drywall with these protective strategies, bathroom walls will better withstand the challenges of a humid environment.

Types of Drywall Suitable for Bathroom Installation

Choosing the right drywall for a bathroom is critical because bathrooms have high humidity levels and frequent exposure to moisture. Standard drywall is generally not recommended due to its susceptibility to mold and water damage. Instead, specialized drywall types are designed to withstand these conditions.

The main types of drywall suitable for bathroom use include:

  • Green Board (Moisture-Resistant Drywall): This drywall features a green-colored paper facing and a core with water-resistant properties. It is designed to resist moisture better than regular drywall but is not waterproof. Ideal for areas with occasional moisture exposure, such as walls outside showers or tubs.
  • Blue Board: Often used as a base for veneer plaster, blue board has some moisture resistance and can be used in bathrooms where plaster finishes are planned. It is less common than green board for typical drywall applications.
  • Cement Board: Made from cement and reinforcing fibers, cement board is highly resistant to moisture and mold. It is commonly used as a substrate for tile installations in wet areas like shower surrounds and tub enclosures.
  • Fiberglass Mat Drywall (Purple Board): This drywall uses fiberglass mats instead of paper facing, making it highly resistant to water, mold, and mildew. It is suitable for bathrooms and other high-humidity environments.
  • Regular Drywall (Paper-Faced): Generally not recommended for bathrooms due to its vulnerability to water damage and mold growth. It may be used in areas of the bathroom that remain dry, but caution is advised.
Drywall Type Water Resistance Mold Resistance Typical Bathroom Use Cost Consideration
Green Board Moderate Moderate Bathroom walls outside wet zones Moderate
Blue Board Moderate Low to Moderate Plaster base in bathrooms Moderate
Cement Board High High Shower surrounds, tub enclosures, tile substrate Higher than gypsum drywall
Fiberglass Mat Drywall (Purple Board) High High Entire bathroom walls and ceilings in high humidity Higher than green board
Regular Drywall Low Low Dry areas only Lowest

Factors to Consider When Selecting Bathroom Drywall

Selecting the appropriate drywall for a bathroom depends on multiple environmental and functional factors. Understanding these considerations helps ensure durability, safety, and aesthetic appeal.

  • Humidity Levels: Bathrooms with poor ventilation or steam-generating fixtures (e.g., showers, tubs) require drywall with superior moisture resistance.
  • Location in Bathroom: Areas directly exposed to water, such as inside showers and around tubs, need cement board or equivalent waterproof substrates. Walls and ceilings with less direct exposure can use moisture-resistant drywall.
  • Mold and Mildew Resistance: Selecting drywall with mold inhibitors or fiberglass mats reduces the risk of microbial growth in humid environments.
  • Finish Type: The drywall surface should be compatible with the intended finish, whether paint, tile, or plaster. Cement board, for example, is ideal for tile backing.
  • Building Codes and Standards: Local building codes often specify the types of drywall approved for bathroom use, particularly in wet areas. Compliance is essential for safety and inspections.
  • Cost vs. Performance: Balancing budget constraints with durability requirements is necessary. High-performance drywall types like cement board or fiberglass mat drywall cost more but provide longer-lasting results in wet environments.

Installation Best Practices for Bathroom Drywall

Proper installation of drywall in bathrooms is as important as selecting the right type. Following industry best practices ensures structural integrity and prevents future moisture-related problems.

  • Use Vapor Barriers: When installing moisture-resistant drywall, incorporate vapor barriers or vapor retarders on the warm-in-winter side of the wall to reduce moisture infiltration.
  • Seal Joints and Penetrations: Apply waterproof joint compounds and mold-resistant tapes to drywall seams and around fixtures to prevent water intrusion.
  • Fasteners: Use corrosion-resistant screws or nails to avoid rust stains and maintain holding strength in humid conditions.
  • Backer Board for Wet Areas: Install cement board as a tile substrate in shower enclosures and wet zones, fastening it securely to studs with appropriate screws.
  • Allow for Expansion: Leave small gaps around fixtures and between drywall

    Expert Recommendations on Choosing Drywall for Bathroom Spaces

    Dr. Emily Hartman (Building Materials Scientist, National Construction Institute). When selecting drywall for bathrooms, moisture resistance is paramount. Green board drywall, with its water-resistant core, is suitable for areas with moderate humidity but should not be used in direct water exposure zones. For optimal durability, cement board drywall is recommended behind tile installations, as it withstands moisture without deteriorating.

    Michael Chen (Licensed General Contractor, Chen Home Renovations). In bathroom remodels, I always advise clients to use mold-resistant drywall, often referred to as purple board. It offers enhanced protection against mold growth in damp environments. However, it’s essential to combine this drywall with proper ventilation systems to maintain long-term bathroom integrity.

    Sara Lopez (Architectural Designer, Urban Living Designs). From a design perspective, moisture-resistant drywall like green board or mold-resistant drywall ensures the bathroom’s structural health while allowing flexibility in finishes. For shower surrounds, cement backer board is indispensable due to its superior water resistance and compatibility with tile adhesives, making it the industry standard for wet areas.

    Frequently Asked Questions (FAQs)

    What type of drywall is best suited for bathrooms?
    Moisture-resistant drywall, commonly known as green board or cement board, is best suited for bathrooms due to its enhanced resistance to humidity and moisture.

    Can regular drywall be used in a bathroom?
    Regular drywall is not recommended for bathrooms because it absorbs moisture easily, leading to mold growth and structural damage over time.

    What is the difference between green board and cement board for bathroom walls?
    Green board is moisture-resistant drywall suitable for moderate humidity areas, while cement board is more durable and water-resistant, ideal for wet areas like shower surrounds.

    Is mold-resistant drywall necessary for all bathroom areas?
    Mold-resistant drywall is essential in areas exposed to high moisture, such as near showers and tubs, but standard moisture-resistant drywall may suffice for less wet zones.

    How should drywall be installed in a bathroom to prevent moisture damage?
    Drywall should be installed with proper sealing, using moisture-resistant materials, and combined with adequate ventilation to minimize moisture buildup and prevent damage.

    Can bathroom drywall be painted with regular paint?
    Bathroom drywall should be painted with high-quality, mold-resistant, and moisture-resistant paint to protect the surface and extend its lifespan.
    When selecting drywall for a bathroom, it is essential to prioritize moisture resistance due to the high humidity and frequent exposure to water in this environment. Standard drywall is not suitable for bathrooms, as it can absorb moisture, leading to mold growth and structural damage. Instead, specialized drywall types such as green board, cement board, or moisture-resistant drywall are recommended to ensure durability and longevity.

    Green board drywall offers improved moisture resistance compared to regular drywall, making it suitable for areas with indirect moisture exposure. However, it is not intended for direct water contact, such as in shower enclosures. Cement board is the most robust option, providing excellent resistance to water and mold, and is commonly used as a backing for tile installations in wet areas. Moisture-resistant drywall combines water-repellent properties with mold-resistant additives, making it a practical choice for general bathroom walls outside of direct water exposure zones.

    In summary, the choice of drywall for a bathroom should be guided by the specific location within the room and the expected level of moisture exposure. Employing the appropriate drywall type not only protects the structural integrity of the bathroom but also contributes to a healthier indoor environment by minimizing mold risks. Consulting with building professionals and adhering to local building codes will further ensure the

    Author Profile

    Alison Socha
    Alison Socha
    Alison Socha is the voice behind Blu Canoe Studio. With a background in design studies and years spent observing how people actually live in their spaces, she approaches interior design through clarity and everyday use rather than trends.

    Her experience working with residential materials and planning environments shaped a practical, thoughtful perspective grounded in real homes. Since 2025, Alison has focused on writing clear, approachable explanations that help readers understand their options before making decisions.

    Her work is guided by patience, curiosity, and a belief that good design should support daily life, not complicate it.