Drywall Arches & Stress Cracks Near Stairs

Removing Any Debris

• Stress cracks can sometimes be accompanied by debris from the broken drywall panel. Use a utility knife to scrape this away. You can also use a utility knife to actually broaden the stress crack. While this may seem counterintuitive, it actually helps create a stronger seal for the joint compound. You don't have to cut away a lot of drywall; just enlarge the stress crack a little on both sides.

Taping Over the Crack

• Self-adhesive drywall tape has made stress crack repair even easier. Typically, you would have to mud first, then tape, then mud again. With this type of tape, you can simply press it very firmly over the crack. Let it set for a few minutes and you'll be ready to continue with your project. Extend the tape a few inches out from the stress crack in all directions to help get a good seal over it.

Using Joint Compound

• Scrape joint compound on over the drywall tape, again, extending a little bit out from the tape. Use a drywall knife that is sized properly for the job. If it's just a small crack, use a 2 inch knife. For larger cracks, use a 4 inch knife. Work from the bottom up and scrape away any excess as you work. Smooth out the surface of the compound with the flat of your knife; you also can use a trowel.

Finishing the Surface

• Let the joint compound set according to manufacturer's directions. This is usually less than two hours, but some compounds may require a full 24 hours. Use a hand block sander to help smooth out the surface of your patch. A fine grade is enough if you don't have a lot of trowel marks or big edges; otherwise use a medium grade. Sand the entire area smooth so you can apply a fresh coat of primer and then paint over the surface. No one will ever know there was a crack there when you are finished.