How to Fix Concrete Block

Patch cracked concrete block with concrete epoxy.

Concrete blocks are most commonly found mortared together to form walls, such as in a basement. Concrete is a durable material and can easily last for 50 or more years. However, cracks will form in it. Many times, cracks in basement walls will allow water to leak into your home. When this happens, patch the crack to maintain the durability of the block and stop the leak. Cracks are easy to fix and your concrete block should continue to last a long time.

Things You'll Need

• Chisel
• Hammer
• Trowel
• Concrete epoxy

Instructions

1. Use a chisel to remove any loose concrete from around the crack. Insert the chisel into the crack and angle it so that the sharp edge of the chisel is pointing away from the center of the crack.

2. Tap the back of the chisel with a hammer to remove concrete from the sides of the base of the crack. Repeat on the opposite side of the crack. When you are done, the crack should be wider at the base than it is at the opening.

3. Scoop a small amount of epoxy onto a trowel. Scrape the trowel over the crack, spreading the epoxy. Make sure the epoxy is pushed all the way to the base of the crack. Apply the epoxy in thin layers to better see what you are doing.

4. Smooth the final layer of epoxy with the flat edge of the trowel. Allow the epoxy to dry.

References

• Fix-It Club: Concrete Repair
• Ask the Builder: Concrete Wall Repairs and Concrete Epoxy