Filling Large Holes In Concrete Walls

I might fill most of the void with spray foam.

Filling large holes in concrete walls.

I m assuming your wall is made of concrete blocks also called cinder or cement blocks. 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 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. Several masonry patching products such as hydraulic cement do an adequate job of filling cracks in concrete. If you notice large recurring cracks or bulging walls at your house don t try to fix these conditions yourself. After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day.

Pop outs are small conical shape chunks of concrete that have popped out and left a hole behind. 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. In most cases you can use a brush or vacuum to get most of the debris.

Removing the debris from a large hole is often a little challenging. If that isn t an option fill the hole with water. If your aim is to make the wall look better a smooth surface is also easier to paint. If this is just a wall above ground on both sides you can mix up some concrete patch and fill the hole back in.

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. Patching such holes is a necessary part of keeping your concrete foundation wall in good repair. Call in a structural engineer for an in depth evaluation. You ll want to fill so the foam is more or less even with the inside of the block.

How to fill large hole in an internal wall using a core which was cut out from a thermolite block using a core drill. Spray the hole with water if it s more than 1 in 2 5 cm deep.