How To Fix Big Hole In Concrete Wall

How to fix a large hole in a cement block 1.

How to fix big hole in concrete wall.

The only way to repair foundation wall cracks successfully is by the injection process. Water may be used to make sure that all loose concrete particles are removed. Scrape out the hole with a mason s chisel while dislodging loose or crumbling block. After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day.

Wet down the holes with water for best patch adhesion. Don t skimp on cost. Using a wire brush brush clean the cracks and the holes. Clean out as much debris as.

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. Vacuum any remaining dust or debris out of the hole. Clean the hole with a stiff fiber or wire brush. 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. Mix a small portion. Fill the cracks and holes with concrete caulk. It provides much better adhesion and curing of the patch.

This is important as most concrete products shrink as they cure and you want to prevent that as much as possible. For that size vertical hole you may need to brace a board over the hole to hold in the patch until it dries. 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. Dampen the hole and surrounding area with water using a spray bottle.

Clean the hole and surrounding area with a wire brush. Lay the chisel on the edge of the hole and point it downward at a 45 degree angle into the. Le the hole or the crack dry for quite some time. If you have a wet dry vacuum this is a great place to use it.