In newly-constructed homes, pressure cracks are unavoidable. House settling due to seasonal changes and temperature fluctuations can cause the cracks to appear on walls and ceilings. In older homes, major renovations like foundation repairs or wall removals can cause structural shifts that lead to pressure cracks. They are easy to repair, but they can return if there is a fundamental structural problem, such as a poor foundation or rotting wood supports. If you are afraid that the pressure cracks are due to a structural problem, consult a contractor before repairing them.
Instructions
1. Gouge out each pressure crack using a utility knife. Remove as much loose material from the opened cracks as possible.
2. Apply a thick coat of joint compound over the gouged-out area using a 6-inch knife. Push the joint compound deep into the cracks.
3. Lay a piece of paper drywall tape over each of the cracks. Make sure there is a thick layer of joint compound underneath each tape or blisters may develop later.
4. Wipe away the excess joint compound by using a 6-inch knife to press it out from underneath the paper drywall tape. Remove as much joint compound as possible. Leave the area smooth. Allow it to dry.
5. Cover the repair area with a generous coat of joint compound using a 12-inch drywall knife. Leave the repair area smooth by gently going over the surface of the repair with your tools. The goal is to hide the taped cracks so that they are not visible through paint, so the smoother your work, the better.
6. Sand the repair area with 100-grit sandpaper until it is smooth. Do not sand too hard. If the tapes begin to show through, you will have to recoat them.
7. Cover the repair area with a thin coat of joint compound, and wipe it off immediately. If the joint compound is too thick, thin it by mixing in some water.
8. Sand and recoat as necessary until the area is smooth and free of blemishes, ridges and tool marks.
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