Concrete repair near me in NYC is a common search when property owners notice cracked concrete, sinking slabs, uneven sidewalks, damaged stoops, or failing driveway sections. Two of the most frequent property maintenance issues across NYC are cracked concrete and sunken slabs. They can appear on driveways, sidewalks, stoops, patios, and basement floors, and they do not fix themselves.
If you are looking for concrete repair near you in NYC, then here is what you need to know about what can cause these problems, what repair entails and how to find a contractor that is worth your hire.
What Causes Cracks in NYC Concrete
There are reasons for concrete cracking, and understanding which reason you are having and how to approach the repair depends.
Freeze-Thaw Cycling
In NYC, the most frequent cause is from freeze-thaw cycling. Water enters through cracks in the concrete, or through small cracks that have developed, and freezes overnight, causing the crack to open by approximately 9%. This happens many times every winter. A hairline crack in October can grow to be a quarter inch by March.
Shrinkage Cracking
Shrinkage cracking occurs when the material is being cured. Concrete contracts to some degree during cure, and if control joints were not provided at regular spaced intervals during installation, the concrete will crack randomly, as it contracts. These tend to be surface cracks, and are seldom structural.
Tree Root Pressure
Tree root pressure is especially prevalent throughout Brooklyn, Queens and the Bronx with older street trees whose root systems reach far below sidewalks and driveways. Roots lift slabs from the bottom and split them.
Settlement and Base Failure
Settlement and base failure can result from insufficient depth, inadequate compaction of the gravel base underneath the slab or degradation of the base over time. The slab is unsupported from beneath, and cracks due to its own weight and traffic.
Structural Stress
Structural stress is cracking that runs diagonally from the corners of openings and/or horizontal cracks in walls below grade; these cracks are not due to surface stresses. These do require professional evaluation prior to starting any repair work.
What Causes Sinking Concrete
Sinking is the setting of one area of the slab below the rest of the slab and often is not caused by the concrete itself.
Not Enough Base Depth
Not enough base depth when it was first installed. The most common cause. The 4″–6″ layer of compacted gravel under a patio or walkway, or the 8” layer under a driveway, compacts and moves over time.
Poor Drainage
The lack of good drainage causes water to flow beneath the slab over and over again and to wash out fine base material, creating voids that the concrete will settle into.
Utility Work Beneath the Surface
Pipes or cables dug in the ground in the past but not properly backfilled and compacted result in soft spots that cause settling years later and are referred to as utility work beneath the surface. More prevalent than is generally recognized in older NYC neighborhoods.
Frost Heave
Frost heave followed by incomplete settling results in some ground heaving upward in winter and may not settle back into position exactly in the spring, causing the formation of irregular surfaces over a few seasons.
Repair Options by Problem Type
Surface Cracks (Hairline to ¼”) With No Displacement
Routine cleaning, routing and applying a polyurethane or epoxy crack filler.
Cost: $200 to $600 per location.
Seals off additional water intrusion, but provides no structural strength.
Wider Cracks With Vertical Displacement
Wider cracks that are not parallel with each other but are offset vertically (one edge up and one edge down).
Displacement should not be filled, it should be addressed. This can be achieved by grinding down the raised edge, slab lifting or section replacement depending on the extent of the damage.
Cost: $400 to $1,500.
Sinking Sections
There are two general methods, mud jacking/slab lifting, or section replacement.
Mudjacking is a process of pumping a cement slurry under the slab to lift it up. Works on standing slabs that are damaged but have settled.
Cost in NYC: $500 to $1,500 per slab section.
Section replacement is the process of removing the sunken slab, repairing the base and casting a new section. More involved but addresses the root cause.
Cost: $800 to $3,500, depending on size and access.
Cracks Throughout an Old Slab
If the cracking is pervasive (extensive) and the slab is relatively old, it is generally cheaper to replace the slab than to patch many areas.
Typical replacement costs:
- Full driveway replacement (~400 sq ft): $3,200 to $5,800
- Full patio replacement (~300 sq ft): $1,800 to $3,600
How to Find the Right Contractor
There are a few things to establish prior to getting anyone to take care of concrete repair in NYC.
Verify Licensing and Insurance
Verify not simply ask. A licensed contractor is covered by liability and workers’ compensation insurance so that if something happens on your property, you are covered.
Look for Proper Diagnosis
Try diagnosing, rather than patching! A decent concrete contractor considers the cause prior to suggesting a repair method. If someone gives you an estimate for the crack and doesn’t check the type of crack and its cause, they are not doing a proper assessment.
Get a Written Estimate
Estimate in writing: scope, materials, method and total cost in writing before work begins.
Confirm Permit Requirements
DOT permits are frequently necessary in NYC for sidewalk/curb work. A contractor should be aware of what jobs require one and do it themselves.
Why Waiting Costs More
Differences in cost between early and late detection of concrete damage are substantial in NYC’s climate.
If water is active through the winter, a $400 repair of a crack can turn to a $2000 replacement in the spring. If another two years are allowed to pass, this minor lifting and stabilizing of the sinking section may require a complete base excavation and replacement of the section at a $3,500 cost.
Not the ramblings of some hysterical man: this is the steady trend in Brooklyn and NYC that Gushi Construction observes each spring.
Why Gushi Construction for Concrete Repair in NYC
Since 1993, Gushi Construction has been fixing cracked and settling concrete in all five NYC boroughs and Brooklyn. The team not only ascertains the root cause of the damage but also recommends a repair solution, guarantees that the base is repaired (when necessary), and offers written estimates without pressure or obligation.
Available 7 days a week, across all 5 boroughs and licensed and insured.
Please call (718) 259-7503 or visit gushiconstruction.com for a free quote for all your concrete needs in NYC, provided by Gushi Construction since 1993.
