Repairing broken concrete corners

Create a ledge for the patch in order to make a stronger bond with the old concrete. Do not be afraid to make the cut-out well beyond the edges of the original damaged area. Smaller patches will not hold as well as larger ones. Square off the edges of the broken step with a masonry blade. Chip out loose and weak concrete with a cold chisel.

STEP 2

Prop a timber form tightly against the vertical portion of the step to hold the concrete patch in place. Block the form against the step with bricks or other heavy objects. Moisten the area and pack in the repair mix. Screed off the excess patching material.

 

 

STEP 3 When the concrete begins to set, use the edging tool to create a slightly rounded edge to match the existing step. Carefully remove the form board – the concrete will still be soft – and finish all exposed surfaces with a float or trowel to match the texture of the old concrete. Cover the patch with plastic sheeting and allow it cure for at least two days before walking on it.

 

 

TIP
Coat the timber form with clean motor oil or WD-40 to keep the concrete from sticking to the wood.