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