The compressor is the easy part. What sinks a cold storage project is the floor under it, the vapor barrier around it and the power and water behind it. A freezer at minus 10 degrees will pull heat out of the soil beneath the slab for years, and if the design ignores that, the ground heaves and the floor goes with it. We think about cold storage from the dirt up.
Oklahoma's cold chain is growing in the places freight already stops. In Ardmore, a March 2025 report described a 33,000-square-foot cold storage expansion under way at a food distributor. In the Panhandle, a pork plant of about one million square feet processes more than 21,500 animals a day, and that scale creates demand for refrigerated space in the region. Energy costs that the Department of Commerce puts 17 percent below the national average help the operating math.
We build refrigerated warehouses, freezer additions and temperature-controlled distribution space for operators and developers. The building is an insulated envelope with a refrigeration plant attached, and the schedule follows the longest-lead equipment, not the structure.
Four decisions to make before the drawings start
The first is temperature zones. Dry, cooler (about 34 to 40 degrees), freezer (zero and below) and blast freezer each carry different insulation, floor and refrigeration requirements. A mixed building needs a clear plan for how product flows between zones, and where the vestibules and dock doors sit. The second is the dock itself. Cold docks use enclosed shelters, insulated doors and levelers sealed for temperature, and the dock is an enclosed, conditioned space of its own.
Third is floor heating. A freezer slab needs a heated subbase, using glycol loops or electric elements, to stop frost heave. Fourth is power resilience. Product loss from an outage is expensive, so owners plan generator capacity or dual feeds. We fold those questions into a short design workshop and put each into the pricing.
Envelope, slab and refrigeration, in sequence
The shell is usually insulated metal panels over a structural frame or insulated tilt-wall panels with a vapor-tight interior face. Roof panels carry a continuous vapor barrier, and every penetration gets a sealed detail. Cold storage building envelopes fail at the joints, so we spend time on panel fastening, caulking and inspection before the refrigeration contractor arrives.
Underfoot, the freezer slab is built as a layered assembly: heated subbase, insulation, vapor barrier, reinforced topping slab. Pour sequences matter, because a slab with joints in the wrong place cracks in service. Refrigeration, whether ammonia or a lower-charge system, arrives on a separate schedule with its own safety and permitting requirements. Our cold storage warehouse work coordinates all three trades on one critical path.
Permits, refrigerant rules and the fire code
A refrigerated warehouse touches more codes than a dry one. The state sets minimum codes through the Uniform Building Code Commission, and cities adopt and enforce their own editions and amendments, and the Construction Industries Board applies a 90-day transition for refrigeration and other trade exams. Refrigeration work needs licensed trades, and the owner should verify credentials with the Board before a subcontract is signed.
Fire protection is another wrinkle. Sprinklers in freezers often use dry-pipe or pre-action systems, and insulated panels have their own fire rating requirements. Ammonia systems bring machinery room rules and release-detection requirements. We pull the building department, the fire marshal and the owner's insurer into one early conversation, because each will review the system through a different lens.
Where the money goes in a cold building
Cold storage costs more per square foot than dry storage, and most of the difference sits in four places: insulated envelope, freezer floor, refrigeration plant and electrical service. Utilities are a quiet driver. Water for condensers, power for compressors and wastewater from defrost cycles may require line extensions. A site next to a deep, strong electric service can save more than a lower land price. In some areas of the state, power is delivered through a public authority; at MidAmerica Industrial Park, for example, custom electricity is provided by the Grand River Dam Authority.
Water supply is a reality check as well. The Panhandle's city of Guymon draws from the Ogallala Aquifer, where levels have been dropping, and reported that on one day it pumped 5.4 million gallons, about 92 percent of its pumping capacity. A cold plant that needs process water has to know whether the utility can serve it. This is part of why we run utility capacity checks during feasibility, ahead of design. Related: cold chain and food and food and beverage processing have similar utility needs.
How we sequence the work
We order refrigeration equipment and insulated panels as soon as the design is stable, since lead times can run longer than the sitework. While those items are in production, we mass-grade, pour footings and build the pad. Underslab heating loops go in before the slab, and we test them before concrete covers them.
Commissioning is the end of the story, not an afterthought. The refrigeration contractor needs time to pull down temperatures slowly so the floor and envelope do not shock. A common mistake is to schedule the tenant's product on the same week the building turns over. We plan a pulldown window into the calendar, and we tell the owner what it costs to skip it.
Calendar realities
A cold building often takes longer than a dry shell of the same size, mostly because of procurement and commissioning. We carry the long-lead items on the master schedule, mark their release dates and make delivery windows part of the contract. Winter is friendlier to freezer slab pours in some ways and harder in others, so we plan curing and protection for the season.
We also tell developers building on speculation that a cold shell is a bigger bet than a dry one. A spec cold building commits to temperature zones before there is a tenant. Some owners build a dry shell with conditioned future zones and add refrigeration when a tenant signs, and we price that route against a full build. Our food-grade warehouse pages give the dry-side alternative for sanitary storage.
Start with temperature and power
Send us the temperature zones, the pallet count and the power available at the site. We will price the envelope, the slab and the utility work, and flag anything that could slow the refrigeration schedule.
Common Questions
Why does a freezer floor need heating?
Frozen conditions can draw heat out of the soil under the slab, freeze the moisture in it and push the floor upward through frost heave. A heated subbase keeps the soil above freezing. It uses glycol loops or electric elements, a design that requires monitoring and backup. We price it as part of the slab package.
What is a realistic pulldown period?
The building and its floor should be cooled in stages, not shocked. The refrigeration engineer sets the rate, and we put that duration on the schedule between mechanical completion and product turnover. Rushing it risks slab cracking and envelope damage. Ask for the number early.
Can a cold storage building be added to an existing warehouse?
Yes, and it is a common expansion. The new cold space needs its own insulated envelope, vapor-tight joint to the existing building and separate mechanical. Floor loads and utility capacity must be checked against the existing facility. A 33,000-square-foot cold addition, like the one reported in Ardmore, is a typical size.
How should we plan for tornado season at a cold facility?
The National Weather Service Norman office records May as the peak month for Oklahoma tornadoes, with 4,518 recorded from 1950 to the present. A refrigerated building is vulnerable because the envelope is an engineered system. We design roof and wall panels to code wind loads and plan a backup power response, since a storm can interrupt electric service for days.
Can food processors and cold storage share a site?
Yes. Many operators place freezer or cooler space next to production to cut handling. The two uses share utilities, but sanitary design and wash-down requirements differ. We coordinate with the processing plant designer so the cold dock, production and shipping flow share the site cleanly.