Concrete Slabs & Foundations in Fort Worth, TX

Plain poured slabs typically run $5 to $10 per square foot installed, though footings and foundations price by the structure, not square footage. Reinforcement type, footing depth, and subgrade compaction on South Tarrant County's expansive clay all move the number. A shed pad prices far below a garage slab or footed foundation, since the engineering differs completely. We quote after an on-site evaluation, not a phone estimate.

Rebar is steel bar reinforcement that carries tensile and bending loads, typically used in footings, foundations, and garage or shop slabs under real structural stress. Welded-wire mesh is a lighter steel grid that controls surface cracking on lighter-load pours like equipment pads and walkways. The coordinated crews specify which one a pour needs per ACI 318/332 guidance, since under-reinforcing a load-bearing slab is a common cause of early cracking.

Residential slabs and foundations typically spec 3,000 to 4,000 PSI concrete, with garage and shop slabs carrying vehicle or equipment loads often at the higher end. Footings and structural foundations follow ACI 332 guidance, which ties minimum PSI to load path and exposure rather than one flat number. Air-entrained mixes are used where freeze-thaw exposure is a factor. We spec PSI to the structure during the quote, not a one-size-fits-all mix.

Concrete reaches roughly 70% of its design strength at 7 days and full design strength at 28 days, the industry-standard '70-in-7' curve that governs every structural pour. Light work like framing layout can often start once the slab bears foot traffic, but full structural loading — walls, heavy equipment, a vehicle lift — should wait for the full 28-day cure, which can extend during a cold snap. We build the schedule around the actual cure timeline, not a fixed date.

It depends on which city the property sits in. Forest Hill routes slab and foundation work through its Permits & Applications department, Benbrook through Building Inspections, and Crowley through Development Services / Building Inspections — not one shared Tarrant County office. A footed foundation or garage addition is far more likely to need a permit and inspection than a simple equipment pad. We confirm what's required before work starts.

A vapor barrier — poly sheeting placed under the slab before the pour — blocks ground moisture from wicking up into flooring, framing, or anything stored on top. South Tarrant County's clay holds water after rain and releases it slowly, so a slab without one can stay damp underneath long after the surface looks dry. It's a low-cost addition during the pour and a much costlier problem to fix afterward.

A monolithic slab pours the footing and floor as one continuous piece, which works well for garages, workshops, and outbuildings on a stable, compacted base. A footed foundation pours separate footings first, sized to carry wall loads to bearing soil, then builds the floor or framing on top afterward. Footed foundations are typically specified where the structure is larger or soil conditions call for reinforcement below standard slab depth.

A typical shed or equipment pad runs 4 inches thick with welded-wire mesh reinforcement over a compacted base, adequate for the light, distributed loads those structures put on the ground. Larger equipment — a generator, an HVAC condenser bank, or heavier storage — can call for a thicker pour or rebar instead of mesh, depending on load and footprint. We size the pad to the equipment or structure going on it, not a generic 4-inch slab.

Most residential garage slabs run 4 to 6 inches thick, with shop slabs carrying heavier equipment or vehicle lifts often specified at the thicker end or with added rebar. The correct thickness depends on what the slab will actually carry — a two-car garage floor and a shop slab rated for a lift and storage racks are not the same problem, even though they look similar poured. We spec thickness and reinforcement to the intended use.

ACI 318 sets structural concrete design requirements broadly, while ACI 332 covers residential-specific requirements for footings, foundations, and slabs-on-grade, including minimum PSI, reinforcement placement, and control-joint spacing. Ready-mixed concrete itself is specified to ASTM C94. Building to those standards rather than an informal pour is what keeps a footing or garage slab performing to its design load for decades on Tarrant County's expansive clay, and it's the standard the coordinated crews work to on every structural job.

A poured slab foundation is generally less expensive and faster to build than pier-and-beam, and it's the standard choice for garages, shops, and most single-story additions on a stable, well-prepped base. Pier-and-beam creates a crawl space and can be preferable on sites with significant grade change or drainage challenges that make a slab-on-grade riskier without extensive base work. On South Tarrant County's expansive clay, the right call depends on the site, which is why we evaluate soil first.