The platform your whole build sits on. Plumb stub-ups in the wrong place cost a plumber a day; a quarter-inch out of square costs your framer two. We pour from 1,200 sqft accessory structures to 6,500 sqft custom homes — flat, square, and ready for framing on day one.
A foundation slab is the datum for everything that follows — every wall, every fixture, every cabinet run references it. Get it flat and square and the trades behind you fly. Get it wrong and you pay for that quarter inch in framing shims and plumbing call-backs for the rest of the build.
We pour monolithic and stem-wall slabs with the vapor barrier lapped and taped, rigid insulation where specified, and every embed — anchor bolts, hold-downs, threaded rod — set with templates so day one goes to framing, not to an SDS bit chasing a misplaced bolt.
We handle in-slab plumbing stub-ups, radon pipe, electrical conduit, and post-tensioning cable layouts when specified. Where the square footage justifies it, the slab is laser-screeded for flatness, then power-troweled to a hard, flat surface that's ready for the next trade.
We coordinate the underground directly with your plumber and electrician and set every embed to a template, so the slab comes out of the forms with the stub-ups plumb and the bolts where the wall plates want them. Framers who've worked on our slabs ask for us by name — a flat, square slab is the cheapest week you'll ever buy on a build.
A 4,200 sqft Brentwood monolithic slab, a stem-wall foundation on a Franklin grade, and a post-tensioned slab on an expansive College Grove lot.
Residential defaults below. Engineered and commercial slabs follow the structural and flatness specs exactly.
| Typical thickness | 4" interior floor · 12"–16" thickened edge Per structural set on engineered foundations |
|---|---|
| Mix design | 4,000 psi @ 28 days ¾" aggregate · 4–5" slump · fiber or as specified |
| Base | 4" compacted #57 stone over compacted subgrade Laser-verified grade · plate-compacted |
| Vapor barrier | 15-mil Stego or equivalent · laps 6"+ taped · penetrations sealed |
| Flatness | FF 35 standard · FF 50 where specified Laser-screed placement on larger pours |
| Embeds | Anchor bolts · hold-downs · radon · PEX · conduit — set to template |
| Cure | Curing compound applied before we leave Framing ~7 days · full load 28 days |
Four steps for a residential foundation slab. Larger custom homes stretch the prep and pour days; the sequence stays identical.
We compact the base, set the vapor barrier, and coordinate plumber and electrician stub-ups — every penetration located off the plan and protected.
Edge forms set to a laser grade, reinforcement and post-tension cable placed, embeds set to template, insulation where specified.
Laser-screed placement, bull-float, then power-trowel to the specified flatness. Crew scales with the square footage.
Control joints saw-cut, curing compound applied, slab handed to the framer flat, square, and dimensioned to plan.
Six common foundation conditions. The forming and reinforcement change with grade and soil; the flat-and-square standard never does.
1,200–8,000 sqft monolithic and stem-wall foundations for Williamson and Davidson custom builders. Most common pour.
Most commonCable-tensioned slabs on the expansive clay and marginal soils where a conventional slab would crack apart.
EngineeredFooting, wall, and floor as separate stages for crawl-space homes and stepped grades.
Multi-stageThickened-edge slabs for detached garages, shops, pool houses, and ADUs.
Turn-down edgeSub-slab insulated foundations for conditioned space and embedded radiant-floor tubing.
InsulatedNew slabs dowelled and tied to existing foundations for additions and renovations.
Tie-inWhat custom builders ask us most on a foundation slab scope.
It depends on grade and design. Monolithic (slab + thickened edge in one pour) is faster and economical on flatter lots. Stem-wall (separate footing, wall, and floor) handles crawl spaces and stepped grades. We'll recommend based on your lot and plans, and defer to your engineer on anything structural.
Standard residential runs FF 35; where a spec or finished floor demands it, we laser-screed to FF 50. For commercial and warehouse flatness we go higher — that's covered under our commercial scope.
Yes, and we set them to a template rather than wet-setting by eye, so they land where the wall plates and hold-downs need them. We coordinate the plumbing and electrical stub-ups with those trades before the pour and photograph their locations.
Around 7 days for normal construction loading — concrete reaches roughly 70% of design strength by then. Full design loads at 28 days. In cold weather we add buffer or keep the slab warm; see our cure-schedule guide in Resources.
Yes, on expansive or marginal soils where they're specified. We place and stress the cables per the PT engineer's drawings and coordinate the inspection. PT is an engineered system — we build to the stamped design.