Overlays
Concrete Overlay– Thin layers of cementitious material can be applied to existing concrete floors, adding thicknesses from ΒΌ” to 1″, with 3/8″ being typical. The material may be self-leveling, to flatten an irregular surface, or trowelable where pattern stamping is desired. A limited range of colors is available. Because hardening aggregates are already present in the material, use of color hardeners is not recommended, but color release agents or chemical staining can be incorporated into the process. Prior to applying overlay material, cracks or fissures in the base slab must be repaired to avoid telegraphing, and the location of existing expansion joints must be maintained. Stamping depth should not exceed 50% of the thickness of the new surfacing layer.