DIY Concrete Crack Repair
You can fix many concrete cracks yourself
A full day
IntroductionFix the crack in your concrete garage or basement floor yourself by following these step-by-step directions.
- Circular saw
- Cold chisel
- Dust mask
- Concrete mix
- Concrete resurfacer
- Latex modifier
Project step-by-step (4)
How to repair cracks in concrete: Cut a groove on both sides of the cracked concrete
Cut a chiseling groove
Using a diamond blade on your circular saw, cut a 1/2-in.-deep groove along each side of the crack. Wear an N-95 respirator and turn on a fan to blow the concrete dust out of the garage. Chip out the cracked portion with a maul and cold chisel.
Concrete cracks are caused by sideways expansion, poor drainage conditions or settling soil beneath the concrete. If your concrete is the same height on both sides of the crack, you can fix it yourself. But you have to enlarge the crack (Photo 1). Then power-wash the area and squeegee off the excess water before applying the concrete crack filler. Fill with a polymer-modified cement such as Quikrete concrete resurfacer No. 1131. Our crack was wide and deep, so we chiseled out the entire opening and refilled it (Photos 2 and 3). However, if one side of the crack is lower, call an expert to diagnose and fix the underlying soil/drainage problem. Then either replace the sunken portion or call a mud-jacking company to raise it.
Cement Crack Repair: Remove the cracked concrete
Knock out the old stuff
Chip out the cracked portion with a maul and cold chisel. Remove the chipped pieces and vacuum out the crack before power washing.
Chip out the cut concrete to get a fresh surface so the new concrete can bond to it.