Filling Deep Cracks In Plaster Walls

2 fill the crack half full with patching plaster.

Filling deep cracks in plaster walls.

First address the root cause so that same problem could be avoided in future. Some like a small hairline crack usually aren t a big deal. However if the plaster separates from the lath or the structure of the wall it s called blown plaster and it requires a more extensive repair. Scrape out the crack crevice with a utility knife.

For finishing you ll need primer and paint. Cut the paper drywall tape. Repairing deep cracks if cracks in drywall or plaster are deeper than a 1 4 inch you will have better success if you first fill the the crevice with a filler compound prior to taping with joint. How to fix cracks in plaster walls ceilings step 1.

When it has dried a little score the plaster with a nail as shown at. 3 dampen the patch. Widen the crack area dampen the surface fill it with putty apply sand paper. Measure the length of the crack and cut strips of self adhesive mesh drywall tape to the correct length.

If it s a small hairline crack you won t have to worry. Don safety goggles and a respiratory mask. Place plastic sheeting or a tarp on the floor. How to repair plaster walls 1.

Address root cause and arrange right tools. Put on safety goggles and disposable gloves then spray pump a stream of the acrylic conditioner into. To repair small cracks in plaster you ll need patching compound medium and fine grit sandpaper a sanding block a putty knife a masonry chisel a paintbrush a rag and a screwdriver. Remove any loose plaster that s embedded in the crack.

Spread the joint compound. Repairing large cracks in plaster 1 widen the crack with the can opener and dampen the edges of the crack with a sponge. Using a 3 16 inch masonry bit drill a hole in the plaster about 2 inches from the crack. Plaster repair is much more difficult than fixing drywall.

Use a utility knife or painter s 5 in 1 tool to cut along the edges of the crack opening up the crack slightly and removing. Using a nail score the plaster. Identify the plaster cracks root cause. Remove all hanging items and furniture from around the cracked area.

Drill into the plaster. There are a couple of reasons why cracks can form in plaster walls.