You won t be able to get a nice flat finish and it won t adhere very well.
Repair top of concrete block retaining wall.
To repair the cinder block retaining wall you need to remove the damage.
Concrete block wall repairs are within the skills of do it yourself people.
Put the concrete epoxy cement on the caulking gun open up the tip to draw out a small amount and squeeze it smoothly into the crack.
To fix the mortar carefully chisel out mortar to a point of a little over 1 2 the depth of the brick.
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.
Have the confidence to try and you will be successful.
Smooth over the repair with a damp cloth and allow it to set.
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Either demolish the wall.
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To do this you can t just spread new concrete onto the old blocks like cake frosting.
Place two large cement blocks tightly against the wall underneath the area to be patched.
Depending on temperature and humidity levels it may take up to eight hours for the epoxy to cure and harden.
Allow the concrete epoxy filler to cure thoroughly.
The easiest fastest cheapest solution to repairing the cinder block was using poured concrete and then painting the entire wall to mask the patch.
You want the site to be as clean as possible.
This mortar is typically one of the first things to show wear on a well made wall.
Smooth the epoxy out along the edges of the crack to overlap the solid concrete on the sides.
Continue working along the entire length of the crack.
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For a crack use the brush to remove loose pieces of concrete and mortar.
If you need to remove an entire cinder block the job is a little harder.
In a brick and mortar retaining wall the bricks are secured together with a layer of mortar which looks like a light gray concrete.
Retaining wall repair options whether a retaining wall is built of stone block concrete or wood it can begin to lean.