Patching Holes In Concrete Block Walls

Fill the cracks and holes with concrete caulk.

Patching holes in concrete block walls.

Using a wire brush brush clean the cracks and the holes. Spread a layer of patch mixture over the. After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day. If you do have hollow cinder block walls then yes you will need to use a filler like spray foam for areas the holes go all the way into the center.

To attach the new concrete to the end of the wall you need to use wall ties. Open it by cutting off the tip and squeezing until the contents come out in a bead. Several masonry patching products such as hydraulic cement do an adequate job of filling cracks in concrete walls. Put a tube of combined mortar and concrete caulk into the caulking gun.

If the holes were smaller i would use hydraulic cement which actually slightly expands as it cures with about a 3 4 minute working time. The purpose of these metal straps is to provide a connection between your new concrete and the original wall. Apply concrete to any gaps in the blocks or mortar using a shovel. Mortar is commonly used to patch concrete and cinder block.

Fill in the cracks or holes with concrete. I considered a lot of options. Lay the chisel on the edge of the hole and point it downward at a 45 degree angle into the block. Holes this large make that type of fix impractical.

Tap the chisel with a hammer and chip downward to the back wall of the block creating a larger. However these products can fail after a few years if your foundation or retaining wall continues to move slightly leaving you with little choice but to chip them out and start all over again. The straps help transfer the load and allows for lateral movement so the new concrete doesn t peel away from the wall with settling or impact. Fill the holes and cracks as deeply as you can then scrape the top over with a trowel so the concrete can patch the wall together evenly.

Le the hole or the crack dry for quite some time. Use mortar and concrete caulk to fill holes if your wall has holes as well as cracks you ll need to use a slightly different material. Chisel out any loose pieces of cinder block around the edges of the hole and brush away any loose debris with a nylon brush. Fill the hole with the patching compound.

Water may be used to make sure that all loose concrete particles are removed.