How Thick Is the Sheetrock That I Need for My Garage?

Disadvantages

• Installing 5/8-inch drywall has several disadvantages. It costs more than thinner types, and it’s heavier, making it harder to work with. Also, builders must follow the drywall manufacturer’s guidelines when constructing wall and ceiling frames to ensure they can handle the additional weight.

Weight Comparison

• Typical residential construction uses 1/2-inch drywall for general living spaces. A 4-by-8-foot panel weighs 54 pounds, or 1.7 pounds per square foot. In comparison, a 4-by-8 panel of 5/8-inch drywall weighs about 73 pounds, or 2.3 pounds per square foot, according to “Ultimate Guide to Drywall: Pro Tips for Hanging & Finishing.”

Advantages

• Installing 5/8-inch drywall offers benefits besides enhanced fire protection. The added thickness provides greater soundproofing. Also, walls and ceilings can withstand more abuse, though the paper facing of drywall tears easily no matter how thick its core is. In garages, where people often store ladders, lawn equipment and other bulky items that can bang against walls and ceilings, the durability of 5/8-inch drywall is a significant advantage.

Considerations

• You can improve upon 5/8-inch drywall by adding a second layer of drywall to increase resistance to fire and sound. The standard approach is to install the first layer as normal with drywall screws. The second layer requires longer drywall screws to penetrate through both layers into the wood frame, and it also requires construction adhesive between the layers.