How to Repair a Cracked Wall and Ceiling Joint

  • 2-10 hours
  • Beginner
  • 50-300
What You'll Need
Joint compound
Utility knife
Putty knife
Paint (optional)
Tape Measure

A cracked wall could lead to a more extensive repair if it’s not fixed at once. The best way to remedy a crack on the wall is to put a joint compound. The joint compound is a kind of putty designed to fill the cracks on concrete. It is strong enough to stay between cracks and prevent the concrete from dirt and anything that could cause more cracks.

Having cracks on walls is inevitable. Since there are many factors why walls get cracked, what is important is you need to treat them as quickly as possible.

Step 1: Clean the Area

Make sure the area you will work on is clean from dirt. Since you need to cover all the cracks, you need to see the size of the cracks to make sure you covered everything. Your efforts will be futile if you don’t cover all the cracks. If you don’t cover the cracks correctly, there’s still a chance that those cracks will develop more cracks. Use your tape measure to get the size of the cracks. Use wet sponge dipped in soapy water and clean the area, making it clean from dust and residue. By cleaning, you get to see if there are more cracks in other parts of the wall.

Step 2: Prepare

If the cracks are few and small, you can just put the joint compound on the cracks. Using a putty knife, apply the joint compound on the cracks. Start with the smaller ones. If there are many cracks on the wall, start in the easier areas. You need to focus first on those areas that needed little attention. Save the harder parts later on.

If the cracks are big, you will need to use a sheetrock. Get a utility knife and cut a hole on your sheetrock. A sheetrock is a kind of plaster wall needed to serve as a protective layer for the concrete. This covers cracks, holes and areas that are needed to be covered before painting. You will use this in repairing the wall.

Step 3: Apply the Joint Compound

Get the patch of sheetrock, tape the edges. Then apply the joint compound, go beyond the tape, to make it seamless. After drying, get sand paper and remove the excess grit on the wall. Make sure not to sand too much so you wouldn’t remove the joint compound.

Step 4: Paint

Although some will consider this optional, it is still advisable to do this. After sanding, get paint and cover the cracks. This paint will also serve as a protective layer on the more vulnerable parts of the wall. It’s up to you how many layers of paint you plan to use. Once the wall is dry, let it stand first for 24 to 48 hours just to make sure that the coatings have penetrated onto the concrete wall.