Finishing inside drywall corners involves applying joint compound (mud) and tape to create a smooth, seamless transition between the two walls.
Taping Inside Drywall Corners
Successfully finishing inside corners is a key step in achieving a professional drywall finish. The process typically involves applying a layer of joint compound, embedding tape into the compound, and then applying additional coats of mud to feather and smooth the corner.
Choosing the Right Tape
For inside corners, paper tape is often preferred over fiberglass-mesh tape. According to one approach, this is because paper tape is creased down the center, making it strong and easy to work with in the tight angle of a corner.
The Taping Process
Here's a general outline for taping inside drywall corners, incorporating key insights:
- Prepare the Corner: Ensure the corner is clean and free of dust or debris.
- Apply First Coat of Mud: Use a drywall knife to apply a layer of joint compound evenly to both sides of the inside corner. The mud should be thick enough to embed the tape.
- Cut and Fold Tape: Cut the paper tape to the required length. Fold it lengthwise along the center crease.
- Embed the Tape: Press the folded tape firmly into the wet mud in the corner. Use a corner trowel or drywall knife to smooth it out, pushing excess mud out from behind the tape. Ensure there are no bubbles or wrinkles.
- Remove Excess Mud: Draw your trowel along the corner to remove the excess mud that squeezed out. Leave a smooth, thin coat covering the tape.
- Let Dry: Allow the joint compound to dry completely. This usually takes 12-24 hours depending on humidity and temperature.
- Apply Subsequent Coats: Apply one or two more thin coats of mud, feathering the edges out onto the wall surface to create a smooth transition. Allow each coat to dry and lightly sand before applying the next.
Important Tip: Order of Taping
A crucial step recommended for best results is the order of taping. Before you tape inside corners, it is advised to tape and mud the flat seams first. This way, the inside-corner tape laps over them, creating a more solid and integrated finish.
By following these steps and paying attention to the sequence of work, you can achieve professional-looking inside corners.
