Concrete Patios near you

Two numbers do most of the work. The first is the fall across the slab itself, which has to be enough to move water without being enough to tip a chair; a patio that drains is always slightly tilted, and anyone who promises dead level is promising a puddle. The second is what happens at the edge, because water that leaves the slab still has to leave the yard. A patio that sheds neatly onto a flat lawn against the house has simply relocated the problem three feet.

The code language quoted by Orange County Public Works gives the target: a minimum 2 percent fall away from the building on impervious surfaces within 10 feet of the foundation, a grade that falls at least 6 inches within the first 10 feet, and where lot lines, walls, slopes or other physical barriers prevent it, drains or swales constructed to ensure drainage away from the structure. Where a patio is squeezed into a side yard, that exception is the design: an area drain and a piped outlet, sized and located deliberately rather than added after the first storm.

One practical test costs nothing. Ask the contractor to mark the finished elevations at the house, at the outer corners and at any drain before the forms come out, and go and look at them with a level. Elevations are easy to argue about on paper and impossible to argue about once the concrete has set.

In freezing climates the patio is often the first slab at a house to show surface damage, and the reason is exposure rather than quality. A patio on the north side of the house, under a tree or beside a downspout stays wet longer than a south-facing driveway, and saturation is what makes freezing destructive. FHWA's explanation is that water within the concrete capillary pores freezes and expands below freezing, and where the concrete is critically saturated the expansion of ice exerts pressure inside the hardened concrete that cracks it once the tensile strength is exceeded.

Two things follow. First, the mix specified for a shaded patio in a cold region deserves the same attention as the driveway mix, not less. Second, the site details matter more than they look: a downspout discharging onto the slab, a planting bed that drains onto it, or a low corner that holds a sheet of ice all February will damage even good concrete. In hot, dry regions the seasonal risk inverts, and the issue is placing and curing concrete in high heat, where the surface can dry faster than it can gain strength.

Patios sit in the part of the code where zoning, drainage and building rules overlap, and the answers are local. Some cities exempt a ground-level patio from a building permit and still regulate it through lot coverage or setback rules; others treat any new hard surface as a stormwater matter. Raleigh, for example, lists patios and decks alongside roofs, driveways, streets and parking areas as impervious surface, treats impermeable materials such as asphalt, concrete and wood as 100 percent impervious, and applies maximum impervious limitations to residential lots.

Where lot coverage is tight, a permeable design can be the difference between an approved patio and a redesign. EPA notes that alternative materials including pervious concrete, pervious asphalt, interlocking pavers and plastic grid pavers allow rain and snowmelt to seep through the surface, and that permeable pavements can help filter out pollutants that contribute to water pollution. Whether your city gives credit for that, and how much, is a question for the planning counter and not for a contractor's brochure.

Two other approvals catch people out. If the patio is excavated at all, the 811 call applies exactly as it does for a driveway. And if you belong to a homeowners association, its architectural rules may govern the color, the finish and the footprint regardless of what the city allows.

Patios get treated more harshly than their owners think: grill grease, planter stains, furniture dragged across them and pressure washers held too close to the surface. A gentle wash and a sealer chosen for the finish you actually have will do more than an aggressive annual cleaning, and on a stamped or colored patio the sealer is not optional, because it is carrying the appearance the slab was bought for.

The edges deserve attention in freezing regions. Soil settling away from the perimeter lets water run under the slab, and a joint that has lost its sealant at the house wall is a direct route to the foundation. Keeping the perimeter backfilled, the joint at the building sealed with a suitable material and the beds adjacent to the patio draining away rather than toward it is the whole of patio maintenance that matters structurally.

Patio bids diverge on ground preparation and on finish, in that order. The variables are the area and the shape, how much excavation and fill are needed to establish the fall, the base depth, the finish and whether color is integral or applied, the jointing and sawcut pattern, steps or seat walls, any area drains and piping required where the fall cannot be achieved, access for machinery through a side yard or gate, and whether sealing is included in the price or quoted separately. Ask for the finished elevations, not just the square footage.

LokalMatch is where the project begins. You describe the patio once: roughly how big, where it meets the house, which way the yard falls, what finish you have in mind and how a crew and a truck would get to the back yard. Concrete patio contractors covering your area receive the request and the ones interested reach out to you. Pros pay for the requests they receive, and homeowners are never charged. LokalMatch does not build patios, does not set prices, and does not vet, rank or recommend any contractor, so checking licensing, insurance, permits and the written drainage plan is on you.