Concrete Contractor Services in Montana
Solid Solutions with Glacier Ridge
Expert Concrete Services
Foundations to Finishes
Focus on Durability
Built to Last
Why Work With Glacier Ridge Excavation?
Quality Without Compromise
FAQ
In the Flathead Valley — including Whitefish, Kalispell, and Columbia Falls — footings typically need to be 48″ below grade to protect against frost heave. Montana’s freeze-thaw cycles are significant, and a footing that doesn’t reach below frost depth will move. Depth may vary based on specific soil conditions and local jurisdiction requirements.
Most slabs require 4″–8″ of compacted gravel base. A practical rule of thumb: gravel depth often
matches slab thickness. For slabs on marginal subgrade — common in parts of the Flathead Valley — we may recommend the higher end of that range.
Poured (panel form) foundations use removable forms that are stripped after the concrete cures.
Insulation must be added separately if required by code. ICF (Insulated Concrete Forms) foundations keep the forms in place permanently — they become the wall’s insulation. In Whitefish and much of the Flathead Valley, energy code requirements often make the two systems comparable in total cost. ICF provides better thermal performance out of the box, while poured is generally more straightforward to form and inspect.
All concrete cracks — the goal is to control where it cracks. We cut relief joints specifically to direct cracking to intentional locations.
Problematic cracking beyond normal relief is typically caused by:
- Poor subgrade preparation
- Inadequate compaction
- Improper drainage — a particular concern in Montana’s wet spring conditions
- Freeze-thaw movement
Yes — drainage is critical, especially in Montana where spring snowmelt and rain saturation are
common. Typical systems include grading away from the foundation, perimeter drains (French drains), washed rock backfill, and filter fabric to keep fines out of the drainage system. Skipping proper drainage is one of the most common — and costly — mistakes we see on existing foundations throughout the Flathead Valley.
