Before painting a room, it’s important to repair any cracks, dents, or other flaws in the drywall. To make it easy to see flaws in a wall, hold a strong light against the wall and shine it across the surface.
Types of Joint Compound
Joint compound is available premixed in buckets, which take 12 to 24 hours to dry after application. Premixed joint compound dries ay evaporation, so apply thin coats and allow each coat to dry before applying more.
Joint compound is also available as a fast setting powder, which cures by chemical action in 20 to 30 minutes after it is mixed with water. Both types of joint compounds should be mixed thoroughly until smooth before applying.
Minor Drywall Repairs
To repair dents, small cracks, and other minor defects in drywall, apply joint compound to the wall using a drywall knife or wide putty knife.
After the joint compound has dried, apply additional coats until the defect is filled.
Sand the hardened joint compound with medium grit sandpaper using a flat sanding block or pole sander until the repair is smooth and flat. Be sure to wear an approved dust mask when sanding drywall.
Repairing Larger Cracks
For larger cracks or defects, apply joint compound to the wall, then cover the crack with paper drywall tape pressed into the wet compound. Cover the tape with more joint compound, and allow it to dry before sanding.
Watch the video for details.
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