A concrete overlay is a thin color concrete cement based products that go over existing concrete for repair or decorative reasons. Overlays can be applied as thin as a feather finish up to in most cases 3/4″ depending on the desired finish. Concrete overlays, however, are only as good as the substrate it is being applied to. Example, if the concrete is cracked or coming up, the overlay will also break and come up and replace the concrete should be your option.
There are ways to strengthen or treat existing concrete, however, because the ground moves depending on weather conditions, and moisture, there are never any guarantees the overlay will delaminate or crack. Surface preparation and crack repair to essential for a concrete overlay to last at a lower cost