Le the hole or the crack dry for quite some time.
How to fix hole in concrete block wall.
2 use a hammer and cold chisel to chip out a dovetail shape inside the hole.
After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day.
Knock away the cracked and crumbling concrete around the hole.
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.
Water may be used to make sure that all loose concrete particles are removed.
I considered a lot of options.
Chisel away any loose material around the edge of the hole so that the patch will adhere to a solid surface.
Using a wire brush brush clean the cracks and the holes.
Spray the hole out with water using a spray nozzle attached to a garden hose.
How to patch a hole in a cinder block wall step 1.
Remove crumbling or loose concrete block or mortar from the hole and the area around it by tapping gently with a hammer.
Set the spray nozzle to its.
Use a hammer and chisel to remove loose concrete from the hole.
Brush out any remaining dirt or debris.
Fill the cracks and holes with concrete caulk.
How to fill holes in a cinder block wall.
Chisel out any loose pieces of cinder block around the edges of the hole and brush away any loose debris with a.