A freezer slab is built to stay cold for decades, and the ground under it has to be told that in advance. If the soil beneath a freezer room is allowed to freeze, it heaves, and the heave lifts racking and cracks the floor. Cold storage concrete therefore starts with the layers under the slab: a vapor retarder, rigid insulation, a protective working layer and a heating system that keeps the subgrade above freezing. The pour itself happens last.
In Midland that sequence meets a climate that works against it. Temperatures in Midland reached at least 100 degrees F on 33 days during 2022; the 2011 record stands at 65 such days, so the crew is placing insulated slabs in heat that wants to dry the surface before it can be finished. We schedule cold storage pours for the early hours, plan for shade and evaporation control as described in our work on hot and windy weather concrete, and set a rule for when to stop. Owners who plan a freezer or cooler building should expect that the pour calendar is built around temperature as much as around steel and forms.
Where cold storage costs concentrate
A cold storage floor costs more than a standard warehouse floor for reasons that are mostly below the surface. Insulation thickness, the vapor retarder system, the under-slab heating loop and the thicker, more heavily reinforced slab all add cost, and the specification often calls for a double layer of rebar or a top-layer mesh to handle the thermal stress. Owners comparing bids should look at those items line by line, since a bid that omits any of them will grow later.
Joint layout is the other driver. Freezer slabs shrink in service, so the joint plan has to allow for movement without opening gaps that frost or forklifts can exploit. We price joint filling and floor sealing as separate lines and let the owner choose the system that fits the product handling.
Who builds cold storage here
Cold storage in this part of Texas serves food distributors, grocery supply chains, agricultural handlers and businesses that move pharmaceutical or medical supplies. Agriculture and dairy operators bring a different set of questions, since they often want a cooler near the point of production, with washdown floors and drains. Distribution developers want a flexible building that can be a cooler now and a dry warehouse later.
We talk through that flexibility before drawing the slab. A floor designed for a freezer can be used as a dry warehouse floor, but the opposite is not true, so the owner's decision on the first tenant affects the base cost.
Companion concrete and site work
Cold storage buildings depend on their sites. Loading docks carry refrigerated trailers that idle at the doors, so the apron needs thickness and good drainage to avoid ice and standing water. Our truck courts and dock aprons work includes slopes away from the building and sealed joints next to the dock seals.
Equipment platforms for condensers and compressors are another concrete scope, and we pour them with the same care as the main floor. They are often poured later in the schedule, so we leave dowels or blockouts in the slab where they will be needed. See also the work we do on equipment pads and machine foundations.
Design choices to settle before bidding
Four decisions drive the floor: temperature range, the way product enters and leaves the room, the racking system and the expected life of the building. A blast freezer at a very low temperature needs a different heating and insulation system than a cooler held a few degrees above freezing. We ask for the design temperature early and request the engineer's thermal calculation before we price.
Another question is how the room will be commissioned. A freezer cannot be dropped to temperature in a single day, because the slab and the subgrade would experience thermal shock. The commissioning plan, with its pull-down rate, belongs in the schedule and affects when racking and product can be placed.
A calendar built around heat and pull-down
The pour calendar for a cold storage building starts with the weather and works backward. Summer pours begin at first light and finish before the hottest part of the afternoon, with a second crew held in reserve if trucks run behind. Ready-mix haul time matters even more with insulated subgrades, because the concrete will not have the thermal mass of the soil to absorb heat. Seminole sits where U.S. Highways 62, 180 and 385, State Highway 214 and Farm Road 181 meet, and sites in that part of the region need a haul plan that reflects the road network.
After the slab cures, the schedule leaves time for the heating system to stabilize and for the insulation to be inspected. Commissioning typically follows, and the owner's rep should treat the pull-down period as part of the construction timeline.
How we plan a cold storage package
We start with a coordination meeting between the owner, the refrigeration contractor, the engineer and our trade partners, and walk the sequence from the first excavation to the last joint seal. We prepare a written responsibility matrix so each trade knows who sets the under-slab heating pipes, who places the insulation, and who protects it from traffic.
Our coordination covers excavation, buried utilities and the concrete placement package, with the respective specialists following the agreed layer sequence. We keep an inspection hold before each layer is covered, because rework under a freezer slab is expensive and disruptive.
Why the Midland area suits cold storage
SH 349 shares pavement with I-20 for about 10.2 miles on its route around the west side of Midland, and the combination gives a refrigerated truck easy access to long-haul routes. Midland County is 902 square miles with Midland as county seat, bordered by Martin, Glasscock, Upton, Ector, Andrews and Reagan counties, so a building placed anywhere in the county can still reach the city market with a short drive.
For a developer, the question is the site: a lot with strong truck access, reliable power and room for a trailer court. Our distribution center and food and beverage processing pages describe adjacent building types that share many of these needs.
Send the temperature range and the building layout
Send the design temperature, the racking plan and the commissioning date. We return a pour calendar with heat controls, inspection holds and a pull-down allowance your team can check.
Common Questions
Why does the ground under a freezer need heat?
Without heat, the soil under a freezer slowly freezes and expands. That lifts the slab and damages racking and walls. A heating loop under the insulation keeps the soil above freezing and protects the floor.
Can a freezer slab be poured in summer?
Yes, with planning. We pour early, use mix designs with extended set times, shade the area and control evaporation. The slab is cured carefully to avoid early cracking.
How long does it take to bring a freezer to temperature?
Commissioning usually takes days to weeks, depending on the design temperature and the engineer's pull-down plan. The slab and subgrade are cooled gradually, and the schedule should leave this time before product arrives.
Do you install the insulation and heating system?
We coordinate trade partners for those items and place the concrete over them. We keep inspection holds so nothing is buried before the engineer approves it.
Can a cooler floor become a dry warehouse later?
A cooler floor usually works for dry storage, but a dry warehouse floor does not work for a freezer. Tell us the likely future uses and we will recommend a floor design that leaves options open.