Concrete Crack Repair - From Carpet to Stained Concrete - Part 2
One of the most important parts of preparing a concrete floor for a stain or overlay is repairing cracks and divots in the surface. The first step in fixing concrete cracks is chasing the crack with a grinder. This makes the cracks wider in order to allow the repair material to fill the crack. The reason cracks are filled is to avoid shadowing (cracks showing though your topping on the final finished floor). The crack repair material is seeded with sand to help the bonding of the fill material to your final topping. You'll also need to fill divots left by the tack strips your old carpet was attached to. Fill all divots with a cementitious material to get a uniform prepared surface to work with.