Yes. Commercial concrete can be poured all winter in Grand Rapids and greater Michigan, as long as the contractor follows a cold weather process. The question is not whether it can be done. The question is whether the contractor you hire has a plan for it.
What Counts as Cold Weather
The American Concrete Institute (ACI 306) defines cold weather concreting as any time the air temperature has fallen to, or is expected to fall below, 40°F during the protection period. That is higher than most people expect. A cool November day can already count.
Why Cold Weather Is a Problem for Concrete
Concrete does not harden by drying. It hardens through a chemical reaction between cement and water, and that reaction slows sharply as temperatures drop. Below 40°F it can slow almost to a stop.
The bigger danger is freezing. If fresh concrete freezes before it reaches about 500 psi, which usually takes around 48 hours, the damage is permanent. The surface can scale, the strength can come up short, and no one will see it until years later.
How a Proper Winter Pour Works
A good cold weather process has four parts.
Ground preparation. Concrete cannot be placed on frozen subgrade. It can settle unevenly and crack when the ground thaws. The ground is thawed first, typically with heaters or insulated blankets for 24 to 48 hours before the pour.
Mix and delivery. The mix is made to arrive warm. For thin sections under 12 inches, ACI recommends a minimum placement temperature of about 55°F. Heated water and accelerating admixtures help the concrete reach safe strength sooner. Trucks are timed so concrete does not sit and lose heat.
Protection after the pour. Insulated blankets or heated enclosures keep the concrete warm while it gains strength. A common protection period is about 7 days for standard mixes, or about 3 days when accelerated curing is used. The project specs set the actual requirement.
Monitoring. Temperatures are checked, not guessed. Protection comes off only when the concrete has reached the strength the project calls for, and it is not rushed off to save a day.
A local, experienced contractor like JDE Concrete will ensure each stage of the pour is closely monitored, in readiness against factors like the weather.
Check out our commercial concrete services here.
What This Means for Your Schedule
Winter pouring takes more planning than summer pouring. Daylight is shorter, forecasts are less forgiving, and a cold snap needs a buffer. But a well-run winter pour keeps a project moving instead of waiting for spring. Concrete suppliers and finishing crews are also often less booked than during the summer rush, which can mean more flexibility on delivery times.
When It Makes Sense to Wait
Some situations do call for a delay, such as a forecast with a hard, prolonged freeze and no way to protect the work. A good contractor will tell you that honestly instead of pouring anyway. If a contractor says winter pours are never a problem, ask them to walk you through their process.
What to Ask Your Contractor
- Do you follow ACI cold weather procedures?
- How do you handle frozen subgrade?
- What temperature do you keep the concrete at, and for how long?
- How is that monitored and documented?
JDE Concrete builds through Michigan winters using ACI-certified cold weather procedures, and we offer ground heater rentals for thawing and protecting job sites.
Request a free commercial estimate here and we’ll plan your pour around your schedule and the season.
Frequently Asked Questions
What temperature is too cold to pour commercial concrete?
There is no single cutoff. What matters is the temperature of the concrete as it is placed and while it cures, not just the air temperature. ACI 306 treats conditions at or below 40°F as cold weather, which calls for protection measures.
Can you pour concrete on frozen ground?
No. Pouring on frozen subgrade can cause uneven settling and cracking when the ground thaws. The ground should be thawed first, typically with heaters or insulated blankets for 24 to 48 hours before the pour.
How long does new concrete need protection in cold weather?
Fresh concrete must not freeze until it reaches about 500 psi, which takes roughly 48 hours. Full protection periods are longer, commonly about 7 days for standard mixes. The project specifications set the final requirement.
Does pouring concrete in winter make it weaker?
Not when it is done properly. Problems come from concrete that freezes too early or is not protected while it gains strength. With heated materials, ground thawing, and proper protection, winter concrete performs the same as concrete poured in summer.