Montana Concrete Prices, Codes & Climate

Ready-mix cost range

$145–$185per cubic yard

Frost depth reference

61″reference only

ACI 318 exposure classes

F3 · C2 · S2

Air entrainment

required for exterior flatwork

How much does concrete cost in Montana?

Ready-mix in Montana runs roughly $145 to $185 per cubic yard. That is an estimated band, not a quote — published US price sources disagree with each other by nearly two to one. How we source price figures.

What does the Montana climate require?

Long severe winters with wide chinook-driven temperature swings make ACI 306 cold-weather concreting the norm, and freeze-thaw resistance is the controlling durability issue for flatwork.

Under ACI 318, Montana falls in exposure classes F3, C2, S2. Air entrainment is required for exterior flatwork. Air entrainment is required for classes F1, F2 and F3.

How deep is the frost line in Montana?

Compiled reference tables put Montana at about 61 inches. That figure is orientation only. The footing depth you actually have to build to is determined by your local building department — IRC R403.1.4 requires footings to extend below the locally determined frost line, and there is no national number.

Soil concerns

Eastern Montana's alkaline shale-derived soils carry high water-soluble sulfate, so sulfate-resisting cement is routinely specified, while western valleys sit on glacial gravel with good bearing.

Seismic

Southwestern Montana is seismically active — the 1959 Hebgen Lake M7.2 is the reference event — with moderate to high design categories near Bozeman and Helena.

Contractor licensing

We do not publish a licensing determination for Montana without a dated primary source. We do not publish a state licensing determination without a dated primary source. Check the state board directly. Check the official source.

Cities

• Billings
• Missoula
• Great Falls
• Bozeman
• Butte
• Helena
• Kalispell