How to Install Drywall Tape and Mud

Install drywall tape over the mudded joints. Smooth the tape with your hand as you go to eliminate any air bubbles and to ensure the tape makes good contact with the mud. Once you’ve taped an entire joint, use a putty knife to press the tape firmly onto the mud. Repeat the process until all the joints have been covered with tape.

Using the same procedure as for joints, apply mud to the inside corners of the drywall and wipe away any excess. Allow the mud to dry, then sand. Next, crease the drywall tape so it fits snugly into the corners and apply over the mud. Use the putty knife to ensure proper contact and smooth away air bubbles.

Apply another layer of drywall mud over the tape and smooth it out. In most cases, it is recommended to use a lightweight, all-purpose mud for this step as well as a wider trowel or drywall knife to help spread it evenly. Remove any excess mud. This layer should be allowed to dry overnight before continuing work.

Using a wide trowel or putty knife, apply a final coat of mud over the second coat. This will mask any imperfections in the previous coat. It is typically recommended to use a lightweight product referred to as a “topping mud” mixed to a thinner consistency for this step, although your project may vary. Allow the product to dry completely for the time recommended by the manufacturer.

Sand the final coat of mud until completely smooth using a pole sander and 120-grit sandpaper, or whatever grit is recommended by the manufacturer. Use a clean cloth to wipe away any dust after sanding. Now you’re ready to paint.