Texas does not have a winter, right up until the night it does. A cold front that drops a Gulf Coast job site to 25 degrees on a Tuesday and returns to 60 by Friday ruins more pours than a Panhandle January that everybody expected. Fresh concrete that freezes before it gains strength loses much of what it would have had, and the damage is internal and permanent. Preparing for that night, wherever the job is, is the core of cold weather concrete practice.
The basic rule is that concrete must stay warm enough to keep hydrating until it reaches a protective strength, which is commonly about 500 psi before it can survive a freeze and a higher number before it can carry load or have forms stripped. Below roughly 40 degrees, the reaction slows. Below freezing, it stops, and water in the pores turns to ice and expands.
We pour year-round across the state and plan for cold wherever the forecast calls for it, from the high plains around Amarillo to the Rio Grande Valley, where winter work is rare enough that crews and suppliers are not set up for it.
Where the cold actually bites
The Panhandle is the obvious case. Interstate 40 and I-27 run directly through Amarillo, which makes it a freight and manufacturing hub, and the city lies in the part of Texas where sustained freezing is a normal winter condition. A food-processing addition of about 13,000 square feet costing about $10 million was approved for incentives at a plant in Amarillo in March 2024, the sort of project that industrial and manufacturing owners do not like to hold until spring, so concrete work has to continue in cold.
The Valley is the opposite case. A cold storage building of 64,039 square feet in Pharr is listed in the state accessibility database with construction starting October 1, 2025 and completion December 31, 2026, a schedule that carries the foundation work through at least one winter. A freeze in the Valley is rare but not impossible, and when it comes it catches crews unprepared, so we keep blankets and heaters on call even on southern jobs.
Protecting the pour from batch plant to cure
It begins with the mix. We ask the supplier for heated water and, when temperatures call for it, heated aggregates, so the concrete arrives at the specified temperature. Accelerating admixtures help the concrete gain strength faster, and non-chloride versions are used wherever steel is embedded. Air entrainment is specified for exterior flatwork that will see freeze-thaw cycles.
Next is the subgrade and the forms. Frozen ground is never poured on. We thaw the subgrade with blankets or heaters and check it with a probe before the concrete arrives, because concrete placed on frozen soil will settle when the soil thaws. After placement, we cover with insulating blankets, add enclosures with heaters for slabs and walls when temperatures fall far enough and keep unvented heaters away from fresh concrete, since carbon dioxide from combustion can soften the surface. Our trade partners monitor surface temperatures through the protection period.
What the specifications ask for
Project specifications usually say that concrete placed in cold weather must be kept above a stated temperature for a stated number of days, and they define cold weather by air temperature, often when the average daily temperature falls below about 40 degrees for three days. They also limit the temperature of the concrete at delivery and at placement and require that the protection stay in place until strength is verified.
Verification matters. Field-cured cylinders or maturity sensors tell us when the concrete has reached the strength needed to strip forms or remove protection, and we work with testing and quality control to document them. The statewide commercial code is the International Building Code as the municipal floor, with local amendments, and the owner specification usually sets the cold-weather detail that matters most.
Planning around the front, not the calendar
Cold weather is a forecast problem more than a seasonal one. We watch the forecast ahead of every pour, hold a decision point the day before and move placements to the warm part of the day when a front is expected. If a pour has to proceed, we order heated materials, set up enclosures in advance and plan for a staffed overnight watch.
Power is part of the plan too. Temporary heaters, lights and pumps need fuel or electricity, and in an extended cold snap the grid itself can be stressed. ERCOT describes serving more than 27 million Texans over more than 55,000 miles of transmission lines, with a board-set minimum reserve margin of 13.75 percent of peak demand. We do not count on the grid for site heat. Generators and propane are staged ahead of the cold. For the opposite season, see our hot and windy weather work.
What cold adds to the cost
Protection is the cost. Heated water and aggregates, blankets, enclosures, heaters, fuel, overnight watchers and extra testing all add to a pour, and the price grows as the temperature drops. High-early mixes cost more per yard than standard mixes. Sometimes the cheapest option is to wait a day, and we tell owners when that is the case.
The trade-off runs the other way as well. A single failed slab means tearing out and re-pouring, and a delayed schedule on a cold storage facility or food and beverage plant can cost far more than the protection would have. We give owners a cold-weather allowance in the bid, with unit prices for blankets, heat and watch labor, so they can see the price of winter before it arrives.
Tell us about the pour
Send the pour date, the structure and the location and we will tell you what protection it needs. Cold weather costs are easier to carry when they are in the budget from the start.
Common Questions
At what temperature do you stop pouring?
There is no single cutoff. The specification usually defines cold weather as an average temperature below about 40 degrees for several days, and below that we use protection. If the forecast is for a hard freeze and we cannot protect the concrete, we postpone.
Can you pour on frozen ground?
Not on ground that is frozen. We thaw it with blankets or heaters and probe it first. Concrete on frozen subgrade settles when the ground thaws and cracks.
Will heated enclosures make the slab surface dusty?
They can, if unvented heaters put carbon dioxide on the fresh surface. We use indirect-fired or vented heaters where available and keep direct flames away from the surface.
How do you know the concrete reached strength in the cold?
We use field-cured cylinders kept next to the work, or maturity sensors embedded in the concrete, and compare them with the strength required to strip forms or remove protection.
Do you work in the cold on exterior flatwork?
Yes, when protection is practical. Exterior slabs exposed to freeze-thaw cycles get air-entrained mixes and protection, and we avoid de-icing salts during the first winter because new concrete is vulnerable.