How to Use Fiberglass Drywall Tape

Fiberglass drywall tape is used for covering the joints between drywall panels. The major benefit of fiberglass drywall tape is how easy it is to install. Because it is self-adhesive, fiberglass drywall tape doesn't need to be embedded in a layer of joint compound, as paper drywall tape does. But fiberglass drywall tape is more prone to cracking than paper drywall tape, so use setting-type joint compound to create a stronger surface.

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Fiberglass drywall tape
• Setting-type joint compound
• 12-inch drywall knife
• 100 grit sandpaper

1. Lay a section of fiberglass drywall tape over the entire length of the joint.

2. Press it onto the joint, making sure to keep it centered.

3. Cut away any loose strands or excess fiberglass tape. The tape should lay as flat as possible.

4. Using a 12-inch drywall knife, cover the entire length of the fiberglass drywall tape with a coat of setting-type joint compound. Try to feather the edges and leave the surface as smooth as possible.

5. Use the 100 grit sandpaper to sand the joint once it has dried. If the surface is still not smooth, re-coat the joint and sand it again.

Tips & Warnings

• Avoid using fiberglass drywall tape for interior angles. It will not form a sharp corner and may eventually crack.

References

• Manufacturer instructions