Filling Large Holes In Concrete Walls

Patching such holes is a necessary part of keeping your concrete foundation wall in good repair.

Filling large holes in concrete walls.

Removing the debris from a large hole is often a little challenging. Pop outs are small conical shape chunks of concrete that have popped out and left a hole behind. Call in a structural engineer for an in depth evaluation. For that size vertical hole you may need to brace a board over the hole to hold in the patch until it dries.

I might fill most of the void with spray foam. You ll want to fill so the foam is more or less even with the inside of the block. If your aim is to make the wall look better a smooth surface is also easier to paint. 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.

The stuff expands pretty much so start at about a 50 fill and see where that gets you. The hole in this wall was particularly. I m assuming your wall is made of concrete blocks also called cinder or cement blocks. If you notice large recurring cracks or bulging walls at your house don t try to fix these conditions yourself.

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. Clean the hole with a stiff fiber or wire brush. The cracks might indicate a more serious structural problem.

In most cases you can use a brush or vacuum to get most of the debris. Several masonry patching products such as hydraulic cement do an adequate job of filling cracks in concrete. The guys at home depot had a lot of fun lamenting the fact that the hole existed to begin with and then suggested that i build a mold on one side of the wall and fill it in with a pour of concrete. Concrete patch is used for repairs of holes or large cracks while a paste of portland cement and water or a concrete caulking product are suitable for smaller hairline cracks.

Unlike repairing drywall filling the holes requires more than just mashing the patching product into the holes. If that isn t an option fill the hole with water.