What Kind of Drywall is Used on Ceilings?

When considering the drywall used on ceilings, it's important to understand the various types and their applications. Regular drywall, often referred to as white boards, is commonly used in both residential and commercial settings for ceilings and walls. However, the choice of ceiling drywall can vary depending on specific requirements and climate conditions.

The Most Common Ceiling Drywall

The most widely used drywall for ceilings in single-family residences is the standard 1/2-inch [6.35 mm] tapered edge gypsum board. This type of drywall is favored for its ability to maintain a smooth and flat surface after finishing steps such as taping and mudding. The tapered edge design helps in achieving a professional-looking surface that resists warping and provides a smooth transition for finishing materials.

Specialty Ceiling Drywall

For some homeowners or builders, it's also possible to use "sag-resistant" drywall on ceilings, which is a more expensive option that significantly reduces the risk of future irregularities. This type of drywall is particularly beneficial in humid climates where sagging can be a common issue. By choosing sag-resistant drywall, you ensure a more stable and durable ceiling

Floor-to-Ceiling Drywall in Unique Spaces

In spaces that convert garages into living areas or areas that require a high level of fire resistance, the 5/8-inch [15.24 mm] Type X board is often used. Type X board is a fire barrier drywall. This type of drywall is made with a mineral wool core and has a protective fire-resistant coating. In some apartment buildings, if the ceiling separates two different dwelling units, 5/8-inch Type X board can also be used. To achieve a 1-hour fire barrier, it's recommended to use two layers of 5/8-inch Type X board properly attached with screws. Adding more layers will increase the fire resistance beyond 1 hour.

Outdoor Ceiling Drywall

For outdoor ceilings, the choice of drywall must be weather-resistant. Paperless drywall that has a fiberglass face is often used in such applications. This type of drywall is known for its durability and resistance to moisture. Examples like DensGlas are popular choices for outdoor ceilings due to their ability to support various finishes, including tiles or synthetic stuccos like Dryvit, Sto, and others.

Drywall for Plaster Applications

For ceilings that will be finished with plaster, a specialized type of blue board or plasterboard is often used. Blue board has a unique paper facing that absorbs water differently, allowing for a proper bond between the plaster and the substrate. This type of drywall is specifically designed to work with plaster applications, ensuring a smooth and cohesive finish.