About 76% of homes in Drumheller were built before 1991, and below grade that statistic carries more weight than it does almost anywhere else in Alberta, because of what the houses are sitting in. The Red Deer River valley is cut into bentonitic shale and clay, and bentonite is an expansive soil: it takes on water and swells, dries out and shrinks. Differential foundation movement is the normal condition here, not the exception, and basement spray foam insulation in Drumheller has to be planned around that fact.
Soil that changes volume
An expansive clay does not push evenly. One corner of a house sits where a downspout discharges and that soil stays swollen; another corner is under a shaded strip that dries hard. The foundation between them is asked to span the difference. That is why so many older houses in the valley carry stair-step cracking in the basement wall, doors that bind in one season and swing in another, and floor slabs that have parted from the wall along one side. None of it is caused by insulation and none of it is cured by insulation, but all of it decides what insulation can safely be used.
Why this rules out some assemblies
The common retrofit here is a stud wall built against the concrete, batt in the cavity and polyethylene over the face. It fails in two ways on this ground. First, the moisture failure: warm interior air gets past the poly, reaches concrete that is cold and often damp, and condenses out of sight. Second, the movement failure: a wall framed tight to a foundation that lifts seasonally is a wall that is being loaded in a direction it was not designed for, and the finishes record it. Closed-cell foam sprayed directly onto the concrete is adhered to the surface rather than held near it. There is no cavity for air to circulate in, no gap for condensate to collect in, and the layer tolerates substrate movement that a mechanically fixed board system does not.
Water before foam, every time
This is the rule that cannot be bent on a Drumheller basement. Foam is not waterproofing and it does not solve a drainage problem; it simply hides one until the wall behind it is ruined. On expansive ground, the water that matters is usually surface water arriving in a concentrated place. Grading away from the house, downspouts discharging well clear of the backfill, and a weeping tile that is actually working all do more for the foundation than anything sprayed on the inside of it, and they also reduce the soil movement itself by keeping moisture content steadier. We would rather tell you to spend the first dollar on drainage than take it for foam.
The valley floor adds cold on top
Overnight, cold air drains off the prairie above and pools on the floor of the valley. A basement on the bottom is therefore losing heat into cold ground while the house above it sits in the coldest air in the municipality, and in a semi-arid climate with a very wide annual spread the below-grade wall never gets a mid-winter break the way a chinook belt house does. Closed-cell at roughly R-6 to R-7 per inch keeps the dew point inside the insulation instead of on the concrete face, which is the whole point of using it here.
Start with the rim joist
On nearly every older house in this town the rim joist is the leakiest accessible part of the building and the cheapest thing to fix well. If the budget only stretches to one item, it is that one. The walls follow if the space is being lived in, and the slab edge after that. Pricing follows board feet of sprayed area against a target R-value, so a staged plan is genuinely cheaper than a single bite, and we are happy to quote it in that order.
Who does the work
Basement spray foam insulation Drumheller is quoted, scheduled and sprayed by us. Our own installers are on the job, and the number you are given is the number we stand behind.
Basement Spray Foam Insulation Drumheller: Common Questions
Our basement wall is cracked and the crack moves with the seasons. What now? That is the expansive clay. Get the water management and any structural assessment done first; insulation goes on afterwards and must be a material that can move with the wall.
Why not frame a wall and use batt? Because warm air reaches the cold concrete behind it and condenses where you cannot see it, and because a framed wall does not tolerate a foundation that lifts seasonally.
Will foam stop our basement leaking? No. Foam is insulation and an air barrier, not waterproofing. Seepage is a drainage question and has to be resolved before anything is sprayed.
How much does basement spray foam insulation cost in Drumheller? It follows sprayed area and depth. The variable that moves it most on an older valley house is whether existing finishes have to come out first, and whether drainage work has to happen before the foam.
How do I choose a basement spray foam contractor in Drumheller? Ask what they want to know about the ground and the drainage before they quote. Anyone who will price a basement here without asking about water has not understood the soil.
Work out the depth with the R-value calculator, then get a free Drumheller quote. More on Basement Spray Foam Insulation Alberta province-wide.