how to repair horizontal cracks in walls


Are there any safety precautions that need to be taken during the repair process?

How to Repair Horizontal Cracks in Walls

Horizontal cracks in walls are a common problem that can lead to serious damage if not repaired early. These cracks are usually caused by various factors, including soil pressure, foundation settlement, or water damage. If you notice horizontal cracks in your walls, it is important to repair them immediately to prevent further damage. Here are some steps to follow to repair horizontal cracks in walls:

Step 1: Determine the Cause of the Crack

Before starting the repair process, it is important to determine the cause of the crack. If the crack is caused by foundation settlement or soil pressure, it may require professional intervention. However, if the crack is caused by a minor issue, such as water damage, it can be repaired easily.

Step 2: Clean the Area Around the Crack

Clean the area around the crack with a wire brush to remove loose debris, dirt, and loose plaster. Use a vacuum cleaner to remove any remaining dust and debris.

Step 3: Remove Loose Plaster

If the crack is large, you may need to remove any loose plaster around the crack with a chisel and hammer carefully. Make sure not to damage the wall further by removing too much plaster.

Step 4: Apply the Sealant/Adhesive

Once the area is clean and free of debris and loose plaster, apply the sealant or adhesive to the crack. You can use a specialized masonry sealant suitable for the type of wall material. If the crack is small, you can use a flexible sealant, such as silicone or acrylic. Follow the manufacturer’s instructions carefully, and apply the sealant in a continuous line along the crack.

Step 5: Finishing Touches

After applying the sealant, smooth the surface of the crack with a putty knife. Allow the sealant to cure for the recommended time before painting over the surface. Once the sealant is dry, you can paint to match the wall’s color.


Repairing horizontal cracks in walls is crucial to protect your home’s structural integrity. By following the above steps, you can easily repair minor cracks yourself and prevent further damage. But, professional intervention may be necessary if the cracks are severe. Consult with a professional if you are unsure of what to do.

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