Fixing Holes In Concrete Walls

If your aim is to make the wall look better a smooth surface is also easier to paint.

Fixing holes in concrete walls.

If you do have hollow cinder block walls then yes you will need to use a filler like spray foam for areas the holes go all the way into the center. You want the concrete surface in each hole to be perfectly clean. Or rather one very large thing. Mix together in a bucket one part portland cement three parts sand and.

Kudzu9 12 years ago. If the holes were smaller i would use hydraulic cement which actually slightly expands as it cures with about a 3 4 minute working time. Pop outs are small conical shape chunks of concrete that have popped out and left a hole behind. A huge hole in the cement wall that separates our garage from our basement.

Most holes can be fixed with a quality mortar mix although you should use one with a crushed stone aggregate to fill holes over 1 in 2 5 cm deep. For that size vertical hole you may need to brace a board over the hole to hold in the patch until it dries. Just before filling each hole with the expanding concrete repair product use an old spray bottle and spritz the hole with a spray. Using a cold chisel and a 3 pound sledgehammer undercut the hole by making the pop out wider at the bottom than at the top.

Clean the hole with a stiff fiber or wire brush. Patching such holes is a necessary part of keeping your concrete foundation wall in good repair. If this is a retaining wall you need to fix the problem ont he other side of the wall first. Holes this large make that type of fix impractical.

If this is just a wall above ground on both sides you can mix up some concrete patch and fill the hole back in. Spray the hole out with water using a spray nozzle attached to a garden hose.