Full-depth repair A comprehensive concrete repair method where the damaged slab is cut, excavated, and completely replaced down to the subgrade level rather than just resurfaced.
For major structural failures, a full-depth repair is necessary to ensure the sidewalk can withstand pedestrian traffic and weathering. This process involves removing the entire thickness of the concrete flag, grading and compacting the underlying soil or stone base, and pouring a fresh 4-inch or 6-inch slab. In NYC, this is the standard method used to permanently resolve structural DOT sidewalk violations.
Frequently Asked Questions About Full-depth repair
What is a full-depth sidewalk repair?
Cutting out and removing the entire thickness of the damaged concrete, preparing the base, and pouring a new slab, rather than resurfacing.
Why does DOT require full-depth work?
Because it restores the structural section and the base beneath, which is what actually prevents the defect from returning.
How thick should the new slab be?
Standard pedestrian sidewalk is generally at least 4 inches, with greater thickness where vehicles cross, such as driveway aprons. Follow the current DOT standard detail for the location.
What steps does the process involve?
Saw cutting the joints, removing the old concrete, grading and compacting the base, forming, pouring, finishing to the specified slope and curing.