Placing drywall often means dealing with walls and ceilings that aren't exactly plumb in all areas. When the ceiling changes height across the length of a wall, a gap between wall and ceiling can result. Covering this gap isn't a difficult process. All it takes is a quick patching job with mesh tape, and then you can proceed with normal joint taping techniques. In the end you'll create a seamless looking joint between wall and ceiling that conceals the gap completely.
Instructions
1. Place a drop cloth along the floor at the base of the wall in case any drywall or paint falls during the patching process.
2. Place a strip of mesh tape over the gap so that it butts up against the ceiling line. Cut the tape with a utility knife as needed to fit the gap.
3. Cover the mesh tape with drywall mud using a putty knife. Press the mud firmly into the small mesh holes of the tape, creating a surface with the mud where the gap was located. Cover the mesh tape completely with the mud. Extend the mud beyond the borders of the tape about two inches on both the wall and ceiling surfaces.
4. Place a strip of paper tape over the corner between the wall and ceiling, using the putty knife to crease the tape between the two surfaces to create a sharp edge. Use the drywall mud on the wall and ceiling to hold the tape in place.
5. Cover the tape with drywall mud. Spread a light coating of the mud over the tape and onto the adjacent drywall about an inch with a putty knife. Feather the edges of the mud so that the edges blend smoothly into the drywall. Allow the drywall mud to dry then repeat the covering process. Wait for the second layer to dry completely.
6. Sand the mud smooth with a medium grit sandpaper. Switch to fine grit and then sand the edges of the mud where it meets the drywall to smooth the edges and blend them further into the adjacent drywall surface. Wipe the area clean with a piece of cloth to remove any sanding residue.
7. Paint the newly patched area to match the surrounding drywall with a paintbrush. Allow the paint to dry completely and then paint a second coat if needed to conceal the mud.
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