Fixing Holes In Concrete Walls

Holes this large make that type of fix impractical.

Fixing holes in concrete walls.

If this is a retaining wall you need to fix the problem ont he other side of the wall first. If your home has concrete you may notice holes forming due to strong weather or rodents. If this is just a wall above ground on both sides you can mix up some concrete patch and fill the hole back in. 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.

A huge hole in the cement wall that separates our garage from our basement. How to fix a big hole in a cement wall when a posted a little while ago about sealing and patching holes in my garage i conveniently left one small thing out of the narrative. Just before filling each hole with the expanding concrete repair product use an old spray bottle and spritz the hole with a spray. 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.

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. 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. Or rather one very large thing. Spray the hole out with water using a spray nozzle attached to a garden hose.

Set the spray nozzle to its highest pressure. Mix together in a bucket one part portland cement three parts sand and. 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 your aim is to make the wall look better a smooth surface is also easier to paint. For that size vertical hole you may need to brace a board over the hole to hold in the patch until it dries.