Fixing Holes In Concrete Walls

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.

Fixing holes in concrete walls.

If your home has concrete you may notice holes forming due to strong weather or rodents. For that size vertical hole you may need to brace a board over the hole to hold in the patch until it dries. If your aim is to make the wall look better a smooth surface is also easier to paint. Just before filling each hole with the expanding concrete repair product use an old spray bottle and spritz the hole with a spray.

Set the spray nozzle to its highest pressure. 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. Kudzu9 12 years ago. Holes this large make that type of fix impractical.

Pop outs are small conical shape chunks of concrete that have popped out and left a hole behind. Mix together in a bucket one part portland cement three parts sand and. 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. 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.

If this is just a wall above ground on both sides you can mix up some concrete patch and fill the hole back in. Or rather one very large thing. If this is a retaining wall you need to fix the problem ont he other side of the wall first. Clean the hole with a stiff fiber or wire brush.

You want the concrete surface in each hole to be perfectly clean. Spray the hole out with water using a spray nozzle attached to a garden hose.