Concrete resurfacing The process of applying a thin, polymer-modified concrete overlay or coating over an existing concrete slab to restore its visual appearance.
Resurfacing is often used on private patios or indoor concrete floors, but it is highly discouraged and generally unapproved for NYC public sidewalks. The thin overlay easily delaminates (peels off) under heavy pedestrian traffic and sub-zero winter temperatures. If your public sidewalk has surface scaling or spalling, the DOT requires a complete flag replacement to meet safety regulations.
Frequently Asked Questions About Concrete resurfacing
What is concrete resurfacing?
Applying a thin polymer-modified overlay or coating over an existing slab to restore its appearance.
Can a NYC sidewalk be resurfaced instead of replaced?
Generally no. Thin overlays are not an approved method for clearing a violation, which requires full flag replacement.
Why do overlays fail outdoors?
They delaminate under heavy pedestrian traffic, freeze-thaw cycling and salt exposure, because the thin layer moves differently from the slab beneath.
Where is resurfacing appropriate?
On private patios, garage floors and interior slabs, where the exposure and code requirements are different.