Simple Drywall Repair
How to patch a small crack in drywall:
Step 1: Prepare the surface by cleaning out the crack – remove all dirt and debris from the area and make sure it’s completely dry before you get started. Now sand the surface around the damaged area using medium-grit sandpaper (100–150 grit). This sanding provides a good base for the joint compound and smoothes out any texture you may have on the wall.
Step 2: Apply the patch. Method 1: Apply the joint compound with a flexible putty knife or spreader by working across the crack with strokes in both directions, working it into the crack. Method 2: Apply mesh drywall tape with adhesive backing over the crack. Apply a thin layer of joint compound over the tape. Feather the edges of the compound using your joint knife or spreader.
Step 3: Finish. Use the putty knife as a scraper to remove any surplus material. Move it along the cracked area gently to scrape away any extra material. When the material is completely dry, sand the area and prime it for a coat of paint or other finish.