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A concrete patio for foot traffic and furniture is commonly poured 4 inches thick, and that’s the usual starting point in Kenner too. On Kenner’s soft delta soil, though, the base under the slab and the reinforcement inside it matter more than adding another inch, and areas that carry heavy loads like a hot tub or cover posts need thickened sections or footings.
We hear “just make it thicker” a lot from homeowners who’ve seen an old slab crack. It’s an understandable instinct, and sometimes it’s right. More often, the slab that cracked had a weak base or water sitting under it. This guide explains how we decide thickness on a Kenner lot, and where the money is better spent.
Residential patio guides broadly agree on 4 inches for a slab that only sees people and patio furniture. That thickness assumes a compacted aggregate base underneath and reinforcement inside. Thickness then goes up where the load goes up:
For anything structural, the final numbers should come from the design for that structure. A permit office may also ask for engineered details when a slab carries a roofed structure, so ask before you pour.
For a typical backyard patio with chairs, a table and a grill, 4 inches on a properly built base is the common standard. It stops being enough when the slab carries concentrated weight, when the base underneath is poor, or when the patio will double as parking. Those are design questions, and the answer comes from what the slab has to hold, not from a rule of thumb.
Kenner sits between the Mississippi River and Lake Pontchartrain on low, flat ground built from river deposits. Much of the metro’s soil is soft and compressible, often with organic layers near the surface, and the water table runs high. That combination means a slab poured straight onto native soil can settle unevenly as the ground compresses and moisture levels swing between wet and dry stretches.
That’s why our Kenner quotes spend more attention below the slab than in it. Excavating past soft topsoil and compacting a granular base do more to prevent cracks than an extra inch of concrete sitting on a weak foundation. Setting a real slope for drainage matters just as much. You can see the area we serve on our Kenner service area page.
Not by itself. Concrete is strong in compression and weak in tension, so a slab that loses support underneath will crack whether it’s 4 or 6 inches thick; the thicker one just takes longer. Control joints placed at the right spacing give the slab a planned place to crack. Reinforcement holds the pieces together if a crack opens. A firm, well-drained base keeps the support from washing out. Those pieces work as a set, and skipping one weakens the rest.
A typical build, from the bottom up, looks like this. First comes excavation to remove grass and soft, root-filled topsoil. Next is a compacted granular base, built in lifts so it compacts evenly. Then reinforcement goes in, held at the right height inside the slab, not lying on the ground where it does little. Last is the pour itself, with a thickened edge around the perimeter when the design calls for it.
Drainage runs through every one of those steps. Kenner lots are often flat, and afternoon storms in summer drop a lot of water fast. A patio sloped away from the house sheds that water; a patio poured level pushes it toward your foundation or leaves it sitting in puddles. Our concrete patio service plans slope and outlets as part of the job.
Enough that water runs off without the slope being obvious when you walk on it, and always away from the house. The exact fall depends on the patio’s size and where the water can go once it leaves the slab. On a flat Kenner lot, “where it goes” is often the harder question, and it may mean a swale or a drain at the low edge.
Yes, plan for it now. If an aluminum patio cover or a pergola is on your wish list, we can form footings where the posts will land during the original pour. Cutting into a finished slab to add footings later costs more and leaves visible patches. The same goes for a future outdoor kitchen: a thickened pad poured now is cheap insurance. If you run a business in Kenner and are thinking about shade over a seating area, our post on commercial patio covers in Kenner covers the permit and engineering side.
A stamped surface doesn’t need a thicker slab than a plain one; the stamp only textures the top. The same base and reinforcement rules apply. Where people go wrong is cutting thickness on a decorative slab to stay in budget, which risks cracks running straight through an expensive pattern. If you’re pricing a stamped surface, our breakdown of 20×20 stamped concrete patio cost in Metairie explains where the money goes, and the same logic applies in Kenner.
Sometimes. A new slab or a decorative overlay can go over an old one if the existing slab is sound and stable, and if the added height doesn’t create problems at door thresholds or with drainage. If the old slab has settled or broken, the base under it has already failed, and pouring on top inherits the problem. Our general guide to concrete patio cost in New Orleans talks through overlay versus replacement.
If you want flexibility on settling ground, pavers on a compacted base can be lifted and releveled section by section. A concrete slab is one piece, so its base has to be right the first time. Both can work in Kenner; the choice depends on the look you want and how you feel about future maintenance.
Planning a concrete patio and want the thickness and base sized to your lot? Big Easy Patio pours patios across Kenner and the surrounding metro. Call (504) 384-8978 or use our contact page for a free on-site estimate.
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