Hose the wall down or scrub it with a washcloth then use a metal file to smooth out any rough edges.
How to fix a concrete block basement wall diy.
You can t handle this cracked wall by simply filling the crack and finishing off the basement.
There s also a stair step crack on each end of the horizontal crack and the wall is bowed in about 1 in.
Remove as much of the covering as possible so that you can look at the whole wall.
Use an epoxy injection system for basement wall crack repair we repaired a foundation wall which had an 8 ft long crack that leaked water into the basement during periods of heavy rainfall.
Then remove the tape.
To repair small cracks or holes in cinder block walls you can use concrete.
Repair with concrete epoxy for leaks.
Place two large cement blocks tightly against the wall underneath the area to be patched.
There are two materials steel and carbon fiber that are commonly used to stabilize these walls and each has its advantages.
To repair a leaking concrete block wall in a basement you ll need concrete epoxy cement to make a waterproof seal.
If you notice any cracks in the wall then they will need your attention first.
Tape a one foot by one foot square of plastic sheeting plastic kitchen wrap will do to the concrete wall in your basement with duct tape and leave it in place for 24 hours.
Concrete epoxy cement expands it dries to make a seal that can withstand a waterspout of several hundred pounds of pressure.
You might also notice that your basement walls are bowed.
To permanently patch the crack we used an epoxy injection system from polygem called the liquid concrete repair kit 60.
Lay a scrap board over the blocks to provide a surface that will catch any cement patch that falls so it can be scraped up with a trowel and reused rather than ruining the surface below the wall.
The first thing you need to do is tear down anything that covers your basement wall so that you can examine the problem.