Repairing Large Holes In Concrete Walls

The injection process fills the crack from top to bottom from inside to outside.

Repairing large holes in concrete walls.

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. You can use mortar mix to repair masonry but it is about 4 5x as expensive and the finish isn t that much nicer. Concrete is is a lot coarser and includes large rocks and gravel. If this is a retaining wall you need to fix the problem ont he other side of the wall first.

If this is just a wall above ground on both sides you can mix up some concrete patch and fill the hole back in. Deep patch is solid concrete repair product for patching large holes in concrete surfaces. Tap the chisel with a hammer and chip downward to the back wall of the block creating a larger. The only way to repair foundation wall cracks successfully is by the injection process.

For that size vertical hole you may need to brace a board over the hole to hold in the patch until it dries. Surecrete s solid cement filler is a single component just add water cement based chemical patching compound system providing a patch that goes from 1 8 0 32 cm and up. If your aim is to make the wall look better a smooth surface is also easier to paint. To permanently patch the crack we used an epoxy injection system from polygem called the liquid concrete repair kit 60.

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. 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. Holes this large make that type of fix impractical. Patching such holes is a necessary part of keeping your concrete foundation wall in good repair.

Or rather one very large thing. Injecting a typical wall crack with an epoxy or urethane resin is done under pressure pushing the material from the inside all the way to the outside.