Concrete Slabs for Pole Barns, Barndominiums & Metal Buildings in Polk County

Concrete Barn Slabs in Polk County, Poured to Your Building's Plans

A barn slab isn't a big patio. It carries posts, columns, anchor bolts, tractors and sometimes a house. It has to match the building on top of it, down to where every bolt lands. We pour pole barn slabs, barndominium foundations and metal and steel building foundations across Polk County, from Lakeland to Lake Wales.

Polk is farm country as much as it's suburbs. The 2022 Census of Agriculture counted 2,197 farms on 559,699 acres in the county, with about 109,000 head of cattle and calves. That's a lot of hay barns, equipment sheds and horse barns, plus barndos on acreage. Each needs a different slab, and we'll tell you which one yours needs.

You send the plans, we walk the site, and you get a written price. If something on the plans doesn't fit the ground, we flag it before the trucks show up.

Built for Polk County Ground: Sand, Water Table and Sinkholes

Polk has two very different kinds of ground, and a slab plan for one can fail on the other.

Flatwoods. The low, flat land with palmettos and pines sits on sandy soils like Myakka, Immokalee, Smyrna, Pomona and Leon. UF/IFAS describes most of them as poorly or very poorly drained. On these soils the seasonal high water table can sit just 6 to 18 inches below the surface for about four months a year. That's why we often bring the pad up with clean fill and plan drainage first.

The ridge. Higher ground like the Lake Wales Ridge has deep, very sandy soils like Candler and Astatula that drain fast, with the water table more than six feet down year round. It still has to be compacted evenly.

Fill rules. Florida's residential code says fill under a slab must be free of vegetation and compacted, and it caps fill depth at 24 inches of clean sand or gravel unless approved. When a shallow foundation bears on compacted fill deeper than 12 inches, the code calls for a geotechnical report that sets the density testing. We follow that report. We don't guess at a number.

Sinkholes. West-central Florida sits on limestone that can dissolve, and the USGS notes sinkhole type depends on how thick and clayey the ground above it is (USGS Circular 1182). If your land has a history of depressions, tell us.

Wind, Anchor Bolts and Your Engineer's Plans

In Central Florida, the slab is what keeps a barn on the ground in a storm. Hurricane season runs June 1 to November 30, and a steel building or pole barn roof acts like a wing. The Florida Building Code ties design wind speed to the building's risk category and the wind maps in Section 1609.3. Your engineer or building department sets that number, and we build to it.

Here's what that means on our end:

• Anchor bolts set from the stamped plan, with the right size, spacing and embedment, held in templates so they don't drift during the pour.
• Thickened edges and footings sized as drawn, because uplift runs from the roof through the frame into the concrete.

If you don't have engineered plans yet, ask your building company what comes with the kit. We don't stamp plans, and we won't pour a structural slab off a napkin sketch.

Permits and the Florida Ag Exemption in Plain English

Polk County lists concrete slabs that support a structure as needing a construction permit, and it says any building, whatever the size, needs one too, per the Polk County Building Division. Cities like Lakeland and Auburndale run their own permit offices.

Farm buildings can be different. Florida Statute 604.50 exempts nonresidential farm buildings on land used for bona fide agricultural purposes from the Florida Building Code and any county or city code or fee. Floodplain rules still apply. A few things trip people up:

• It covers barns, storage buildings and similar farm structures. It does not cover a building you live in, so a barndominium needs a full permit.
• In Polk, the exemption runs through a notarized Agricultural Exemption Affidavit that is only valid with an issued permit.
• Setbacks and zoning can still apply. Auburndale, for one, still asks for a farm building permit for land use and fire code.
• Polk's permitting guide lists a non-residential farm building under its miscellaneous permits, with scaled plans, a site plan and the parcel ID.

Exempt or not, the slab still has to hold the building in a storm. Read our guide on whether farm buildings need a permit in Florida before you file anything. We aren't lawyers, so confirm your parcel with the building office.

Pouring in Central Florida Heat and Rain

The National Weather Service puts our rainy season at May 25 to October 10, peaking July through early September. Lakeland's normal August rainfall is 9.08 inches, so we pour early and watch the radar.

Heat is the other problem. ACI standards cap concrete temperature at discharge at 95°F for general building work, and hot, windy days dry the surface before it can be finished. We dampen the base, plan the pour around the heat and start curing right after finishing. NRMCA says curing typically runs 3 to 7 days, and concrete left to dry out can lose as much as 50 percent of its potential strength.

Strength is rated at 28 days. When your builder can start depends on the plans and the mix, so we'll give you a real date.

Where We Pour Barn Slabs in Polk County

We work across Polk County, all within about an hour of Wahneta. We pour in Lakeland, Winter Haven, Bartow, Auburndale, Haines City, Lake Wales and Davenport, plus Lake Alfred, Dundee and Fort Meade.

Inside city limits, the city runs its own permit office. Out in the county, the Polk County Building Division in Bartow handles it. Town pages cover the local permit office and ground. See the full service area.