Concrete Slabs and Walks

Have ready

Clear the area before the visit by moving vehicles, grills, and planters off the old slab, and mark sprinkler heads and low-voltage light wire. Know where downspouts discharge and where any buried line runs, because a utility locate comes first. On arrival the technician checks the existing slope with a level, expecting about a quarter inch of fall per foot away from the foundation. He checks the depth and compaction of the crushed stone base and the slab edge thickness at the apron and door thresholds.

• Excavate and compact
• Form and reinforce
• Pour and finish
• Cure and backfill

The visit

A concrete slabs and walks visit starts by naming the failure, not by selling the fix. We check what the problem touched, protect the floors and the rooms below, and leave a written scope. The work is done in one sequence by the same company, so the trade that caused the damage is the trade that closes it.

What fails first on the Shore is what we look at: salt-rotted fasteners, water finding the soft spot, and the 'quick fix' that never dealt with the cause. For concrete slabs and walks, the tell is usually visible on the first visit, and we say what it means in plain English.

Permit

A flat slab on grade, a walkway, or a patio normally is not a permit item in New Jersey, and replacing one in the same footprint usually is not either. A permit is typically triggered when the concrete is a foundation or carries a structure, when it changes grade or footprint near a flood zone, or when the work sits in a town or county right-of-way, such as a sidewalk apron. If the job crosses into that territory, it is pulled before the first form is set.

On the Shore

Concrete here lives through dozens of freeze-thaw cycles each winter, and salt from coastal air and de-icing tracked onto a walk feeds scaling and surface spalling. Water sitting in a low spot freezes, lifts, and pops the top off. That drives the mix and the details: air-entrained concrete, a low water-to-cement ratio, steel held well below the surface so salt cannot reach it, and a compacted base that drains instead of holding water against the slab.

When we leave

Before leaving, the technician lays a level across the new slab to confirm the fall runs away from the house, then hoses it down and watches where the water goes. A low spot that ponds gets corrected while the concrete is still workable. Control joints get cut to depth, the surface gets its cure, and the homeowner gets the care note: stay off it for the first day or two, keep vehicles off for about a week.

Built with

The pour is typically air-entrained ready-mix in the four-thousand-pound range, chosen because it stands up to freeze-thaw and road salt better than a plain mix. Reinforcement is welded wire mesh or rebar set on chairs so it sits in the middle of the slab rather than on the ground. The base is crushed stone, usually three-quarter inch, compacted in lifts, with expansion joint material against the foundation and a curing compound or plastic sheet on top.