How to Permanently Repair Cracked Plaster Walls


It is annoying to find and have cracks on your wall in your home or at your office. Cracks that are normally found in plaster walls or drywall occurs due to a house naturally settling on its foundation, accidents when you bump your wall or when removing furniture or even from a minor earthquake. This type of cracks in walls can be permanently repaired and does not require special skills along with minimal tools. Below are some of the tips that you can learn in order to permanently repair cracked plaster walls.

To clean a down comforter, you need:

  • Dust mask
  • Carbide Tipped Scoring Tool
  • Shop Type Vacuum
  • Fiberglass Mesh Tape
  • Setting Type Joint Compound like Easy Sand 90
  • Premixed Joint Compound like the Plus 3
  • 6-inch Taping Knife
  • 12-inch Taping Knife
  • A couple of 5-gallon Buckets
  • Medium Grit Sanding Sponge

Permanently Repairing Cracked Plaster Walls

How to Permanently Repair Cracked Plaster Walls

  • First thing to do is to open the cracks by using a carbide tipped scoring tool or a utility knife, but make sure not to cut through your wood lath.
  • Loose dust found near the cracks needs to be vacuum using a shop-vacuum type until it is free of dust. These loose dusts normally prevent your new plaster from bonding along with the existing plaster.
  • Then, you need to mix some setting type joint compound to a medium consistency. Once finished mixing it, you have to force the mixture into your crack walls and wood lath by using 6-inch taping knife. You should also ensure that it is not too thick and not too thin.
  • Leave the joint compound to set thoroughly before you apply the fiberglass mesh tape onto the affected area on your walls. You should use yellow or blue colored tape for easy viewing and ensure that when you apply the tape, it is in straight lines. Do not try to curve the tape because if it is not straight, the tape will buckle.
  • After that, you need to apply two or three coats of pre-mixed joint compound. Spread them thinly right over your fiberglass tape and you can use water in order to thin the joint compound. The more thinner that you managed to spread, the more smoothly it will apply. Then, leave them overnight to allow them to dry thoroughly between coats.
  • Once you notice that the final coat has fully dried, you can proceed with the sanding process in order to make it smooth using a medium grit sanding sponge. This must be primed using latex primer, which is good in terms of quality before you start to paint them.
  • Wear a dust mask whenever you mixed powdered plasters as well as creating plaster dust because plasters contain lime that can do damage to your lungs once you breathe them.

Image Credit:

Flickr CC