How To Repair Crumbling Concrete Window Sill [portable] Page

For most homeowners,

Using your cold chisel and hammer, chip away any concrete that is cracked, loose, or sounds hollow when tapped. —meaning, chip at an angle so the hole is slightly wider at the bottom than the top. This creates a mechanical “key” for the new material. Continue until you reach solid, sound concrete. how to repair crumbling concrete window sill