Repairing Plaster Walls: Cracks
Step
Step
Step
Widen the crack to about 1/8-inch with a chisel and blow out any loose plaster.
Wipe crack with a dab of surfacing compound, pressing it into fissure.
Seal patches with primer before painting, or the patch may "bleed" through.
If your home has plaster walls, you can resign yourself to patching before every paint job. Harmless cracks will return with regularity no matter how often you fill them. Watch, though, for loose or crumbly cracks, holes, and bulges; these may mean you have a leak. If you have a leak, fix it before doing any work on the walls.
Too much or too little water in the original mix also weakens plaster. It's easier to use premixed materials for small repairs. Drywall joint compound works easily into all but the finest cracks, smooths bumpy surfaces, and fills fairly deep holes in a couple of applications.
Too much or too little water in the original mix also weakens plaster. It's easier to use premixed materials for small repairs. Drywall joint compound works easily into all but the finest cracks, smooths bumpy surfaces, and fills fairly deep holes in a couple of applications.
Step
Let dry 24 hours, then level off the repair with a second application. After the second coat has dried, sand smooth, then seal with primer before painting.
related video: repairing plaster cracks
How to prepare and repair cracks in plaster.
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Materials:
1. Hammer
2. Chisel
3. Putty knife
4. Broad knife
5. Old toothbrush
6. Sandpaper
7. Paintbrush
1. Hammer
2. Chisel
3. Putty knife
4. Broad knife
5. Old toothbrush
6. Sandpaper
7. Paintbrush
Time: Small hairline: 20 to 30 minutes
Large cracks: 1 hour; 2 days to dry
Large cracks: 1 hour; 2 days to dry
Skill: Basic Skills, DIYer
Spackling hairline cracks: 20 to 30 minutes
Patching large cracks: 1 hour
Step
Step
Step
Undercut wide cracks, making them broader at the bottom than the surface to lock in the filler material.
Clean the debris and crumbly material out of the crack with an old toothbrush.
Clean the debris and crumbly material out of the crack with an old toothbrush.
If you are using plaster for the repair, thoroughly wet the crack before patching to insure a good bond.
Pack the plaster into the crack with a putty knife or a wide blade taping knife.
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