![]() Wide cracks: A crack of 1/4 inch to 1/2 inch in width is problematic it's a sign of something going on that is more serious than a house settling or climate control issues.They are most common in the first 10 years of plaster installation. Diagonal, horizontal, or vertical cracks: These streak-like cracks are structural cracks caused by foundation movement, moisture expansion, or plaster drying and shrinking.This is a sign of a bigger problem that should be remedied immediately. Simply spread the spackle over your hole, allow it to dry from pink to white and then sand and paint. If you’ve got a small hole, using spackle to fix it will keep you from cutting into the wall and should make your fix much easier. It could be from outside water getting in or a pipe in the walls that has sprung a leak. Step 1 Step 1 For Small Holes, Use Spackle or a Drywall Repair Patch Kit. Bubbling or discoloration of plaster: If you notice cracks that include bubbling, wetness, discoloration, or water stains, you likely have water seeping into the wall. Repair patches come in a range of sizes and they create a strong and durable wall finish.The outer layer may only need removal and replastering. Bulging is usually caused by a simple problem like the outer layer separated from the inner layer of plaster, called delamination. ![]() Bulging: Bulges in plaster create small cracks emanating from them.Hairline cracks are usually caused by plaster drying, expanding, and contracting. There is no need to bother with them unless you want to clean them up cosmetically. Hairline or spiderweb cracks: These cracks are benign they are so small that you can hardly fit a fingernail in them.If you use plaster, apply it with a plastering trowel, laying it overt the tape and feathering the edges into the surrounding wall as well as possible. Place a patch from the DAP Wall Repair Patch Kit over the hole in the drywall, pressing firmly around the outer edges to ensure a strong bond. If you use joint compound, spread it with a 6-inch drywall knife and scrape the surface lightly to flatten it. The Spruce Home Improvement Review Board Apply one coat of plaster or drywall joint compound over the tape.
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