How To Fill A Big Hole In Concrete Wall

Use a cold chisel and hammer to make the space wider underneath the hole.

How to fill a big hole in concrete wall.

Wet the surface and apply a concrete bonding agent apply the bonding agent inside the hole with a paintbrush. Spread a layer of patch mixture over the. Watco concrex vertical is specially formulated to repair damaged concrete pillars sills lintels beams render and stonework. The stuff expands pretty much so start at about a 50 fill and see where that gets you.

Use the corner of a trowel or your finger to pack the compound into the hole making sure it is completely full. Wait for about 10 to 15 minutes or until it gets sticky. You ll want to fill so the foam is more or less even with the inside of the block. Mix it up to the consistency of peanut butter and fill what s left.

Then mix the mortar fill in the hole and level it to blend it in with the surrounding structure. Remove loose material with a wire brush and blow out any remaining debris. Concrete takes time to cure so keep the patch moist for several days for a stronger fix. After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day.

Remove loose material from the hole in the wall by probing it with the tip of a. 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. Fill the hole with the patching compound. Repairing the holes in a concrete wall involves undercutting the hole.

Then use one of the concrete patching mix like the one from quikrete. Before attempting to fill a hole clear out loose concrete and other debris.