Concrete Slabs in Mandeville, LA

What Does Concrete Slabs Cost in Mandeville?

A standard residential concrete slab in Mandeville runs $8 to $13 per square foot in 2026, installed and finished. A 600 square foot patio or shed slab lands between $4,800 and $7,800. A larger 1,200 square foot garage slab typically runs $9,600 to $15,600.

Four factors move that range. First, subgrade prep: sandy soil that has been disturbed or poorly graded needs more compacted base material, which adds cost. Second, edge forming: a full turndown edge monolithic pour costs more than a simple formed edge but eliminates the most common failure point. Third, reinforcement: wire mesh is standard, but #3 rebar on 18-inch centers adds $0.80 to $1.20 per square foot. Fourth, finish: a broom finish is the baseline; exposed aggregate or a troweled finish adds $1.50 to $2.50 per square foot.

Confirm permit requirements and fees with the St. Tammany Parish Department of Permits before the job starts.

What Does Mandeville Ground Demand for a Concrete Slab?

Sandy pine-flat soil compacts well but sheds water fast, and that fast drainage is exactly what erodes slab edges when surface grading is not handled correctly. The water table sitting 5 to 12 feet below grade means dewatering is rarely needed, but edge erosion during a hard rain event is a real failure mode.

Every concrete slab poured in Mandeville gets 4 inches of compacted crushed gravel base. The gravel base stays stable under load and resists the washout that uncompacted sandy fill invites. A 6-mil poly vapor barrier goes over the gravel before any concrete is placed. The slab itself uses a 4000 PSI mix, one grade above the regional residential standard, because sandy subgrades offer less natural bearing than clay-heavy soils further south.

The turndown edge is the single most important detail on a Mandeville slab. A monolithic pour that thickens the perimeter to 12 inches at the edge locks the base material in place and gives rainwater no easy entry point beneath the slab. Surface finish grade slopes a minimum of 1 inch per 8 feet away from the slab perimeter to direct runoff clear of the edge.

How Does the Job Run in Mandeville?

A standard 600 square foot slab in Mandeville takes two to three days from excavation to finishing. Day one covers excavation to a consistent 8-inch depth, grading for drainage slope, and compacting 4 inches of crushed gravel base in two lifts. Sandy soil compacts faster than clay but shifts during forming if disturbed, so forms are staked firmly before any gravel work begins.

Day two is the pour: vapor barrier down, reinforcement set, monolithic turndown edge formed, concrete placed and screeded to grade. Control joints are hand-tooled or saw-cut every 10 feet within 12 hours of the pour. Foot traffic is safe at 24 to 48 hours. Vehicle loads wait 7 days. Full cure is 28 days.

Recent Concrete Slab Project in Mandeville

Backyard patio slab, Mandeville

Job type: residential patio slab. Square footage: 480 sq ft. The slab replaced a gravel pad that had eroded at two corners after repeated heavy rain, leaving a 4-inch drop at the rear edge. Excavated to 8 inches, regraded for a 1.5-inch cross-slope to carry water to a perimeter swale, compacted 4 inches of crushed gravel in two lifts, laid 6-mil poly, and poured a monolithic 4000 PSI slab with a 12-inch turndown edge on all four sides. Finished with a broom texture for traction. Two days on site.

Questions Mandeville Customers Ask About Concrete Slabs

Do I Need a Permit for a Concrete Slab in Mandeville?

Most slabs above a certain square footage require a permit in St. Tammany Parish. Thresholds and fees change, so contact the St. Tammany Parish Department of Permits directly before any work begins. Pulling the correct permit protects the homeowner if the property is ever sold or if a claim is made.

Why Is the Turndown Edge So Important on a Mandeville Slab?

A turndown edge creates a thickened concrete beam at the perimeter that holds the base material in place when rainwater runs along the slab edge. Sandy soil erodes easily once water finds a path under the slab. A 12-inch monolithic turndown eliminates that path and extends slab life significantly compared to a standard formed edge over sandy subgrade.

Can an Existing Slab Be Saved If the Edges Have Eroded?

Minor edge erosion under 1 inch of vertical drop can often be stabilized with foam lifting and perimeter sealing. Erosion greater than 2 inches, or erosion that has moved inward more than 12 inches from the edge, usually means the base has compromised enough that replacement is more reliable than repair. A site visit gives a definitive answer either way.

For a free on-site estimate on a concrete slab in Mandeville, call or use the contact form. We review the subgrade, confirm the drainage grade, and provide a written scope with material specs before any work is scheduled.