Filling Deep Cracks In Plaster Walls

Don safety goggles and a respiratory mask.

Filling deep cracks in plaster walls.

Address root cause and arrange right tools. 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. Cracks appear on plaster walls due to many reasons but the most common reasons are settlement vibration and atmospheric changes. How to repair plaster walls 1.

If it s a small hairline crack you won t have to worry. Using a nail score the plaster. 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.

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. Some like a small hairline crack usually aren t a big deal. Remove any loose plaster that s embedded in the crack. Plaster repair is much more difficult than fixing drywall.

Repairing large cracks in plaster 1 widen the crack with the can opener and dampen the edges of the crack with a sponge. 2 fill the crack half full with patching plaster. When it has dried a little score the plaster with a nail as shown at. Using a 3 16 inch masonry bit drill a hole in the plaster about 2 inches from the crack.

Put on safety goggles and disposable gloves then spray pump a stream of the acrylic conditioner into. How to patch deep cracks in old plaster walls 1. Drill into the plaster. For finishing you ll need primer and paint.

3 dampen the patch. Remove all hanging items and furniture from around the cracked area. There are a couple of reasons why cracks can form in plaster walls. Apply tape to the crack.

Place plastic sheeting or a tarp on the floor. Scrape out the crack crevice with a utility knife. First address the root cause so that same problem could be avoided in future. Identify the plaster cracks root cause.

Measure the length of the crack and cut strips of self adhesive mesh drywall tape to the correct length. Widen the crack area dampen the surface fill it with putty apply sand paper.