How to Repair Drywall Cracks

D Drywall cracks are an inevitable part of home maintenance, usually caused by the natural settling of a house or fluctuations in humidity. While they look like minor eyesores, ignoring them allows them to widen and become significantly more difficult to patch later. A properly repaired crack should be completely undetectable once you repaint, becoming a permanent fix rather than a temporary cover-up. The secret to a professional-grade repair is not just filling the gap, but reinforcing it. If you simply spread compound over a crack, it will almost certainly return within a season. By properly preparing the surface and using the right reinforcing tape, you bridge the movement in the wall and create a seamless transition that blends back into the existing texture of your home.

  1. Widen the crack first. Use a utility knife or a V-groove tool to slightly widen the crack into a V-shaped trench. This creates a larger surface area for the joint compound to grip, preventing it from pulling away later.
  2. Clear all dust away. Use a damp sponge or a vacuum to remove all loose drywall dust and debris from the newly created V-groove. A clean surface is mandatory for the adhesive on your tape to stick properly.
  3. Tape the entire crack. Apply self-adhesive fiberglass mesh tape directly over the crack, running it the entire length of the repair. Press the tape firmly into the wall to ensure it sits flat without any bubbles or folds.
  4. Press compound through mesh. Use a 6-inch taping knife to press joint compound through the mesh and into the V-groove. Keep the layer thin; your goal is to fill the channel and cover the mesh, not to build a giant hump on the wall.
  5. Sand smooth, feather edges. Once the first coat is bone-dry, lightly sand it with 120-grit sandpaper to remove ridges. Apply a second, wider coat of compound to 'feather' the edges, extending the patch 2 to 3 inches beyond the first coat to blend it into the wall.
  6. Prime before painting. Sand the final coat until perfectly smooth, wipe away all dust with a tack cloth, and apply a coat of drywall primer. Once dry, your repair area is ready for finish paint.