Wall spray foam insulation in Drumheller is the most invasive job on this list and the one that needs the clearest explanation before anybody commits to it. About 76% of homes here were built before 1991 and a large part of that went up for mining families during the decades when coal ran this valley, which means the walls are not the assembly most insulation advice assumes.
What is actually in these walls
Open up an exterior wall in an older Drumheller house and the common findings are these. Framing at irregular spacing, often smaller in section than modern dimensional lumber. Diagonal or horizontal board sheathing with gaps between the boards, rather than a sheet product. No sheathing membrane behind the cladding, or a layer of building paper that has long since torn. Sometimes nothing in the cavity at all; sometimes sawdust, wood shavings, or a batt added decades later and now slumped to the bottom half of the bay. The cladding over the top may have been replaced once or twice, and there may be a second layer over the first.
Why that changes the strategy
Two consequences follow. The first is that the cavity is not a regular dimension, so nothing cut to a size fits it; a sprayed material that expands into what is actually there is the only thing that fills it completely. The second is more important and less obvious: a wall with gapped board sheathing and no membrane has always dried by air moving through it. Making that wall airtight on the inside changes how it dries, and that has to be a deliberate decision rather than a side effect. On an exterior-clad wall where the cladding is sound and drainage behind it is poor, filling the cavity entirely with a vapour-closed material needs thought about which way the assembly will dry.
The honest answer about injection
Drill-and-fill injection into a closed wall is attractive because it avoids demolition, and on this stock it carries real risk. The installer cannot see what is in the bay, cannot see whether a fire block divides it, and cannot see whether the sheathing boards have gaps that the material will push through to the back of the cladding. On a wall with board sheathing and no membrane, foam finding its way into the drainage space behind the siding is a genuine possibility. We would rather open a wall that is being refinished anyway than inject one blind, and we will say so.
When wall work makes sense
The right time is when the finish is coming off for another reason: a room being gutted, a re-side that exposes the sheathing from outside, a kitchen or bathroom being rebuilt, or a section of wall being repaired after foundation movement. The valley is cut into bentonitic shale and clay, which swells and shrinks with moisture, and differential movement means walls in this town do get opened for repair more often than elsewhere. Insulating at that moment costs a fraction of insulating on its own.
What goes in, and what else the job buys
Closed-cell at roughly R-6 to R-7 per inch delivers the most R-value in a shallow old cavity and acts as its own vapour retarder past about two inches. Open-cell at roughly R-3.5 to R-3.8 per inch fills a cavity more cheaply and suits interior walls and sound work. Either way the real prize is the sealing that comes with it: the top and bottom plates, the window and door rough openings, the junctions at the floor system, and the uncapped balloon-framed cavities that in this stock run from the basement to the attic. Those are the paths that make these houses draughty, and the wall job is the only chance to reach them. We quote the job, schedule it and stand behind it, and pricing follows the sprayed area against a target R-value.
Wall Spray Foam Insulation Drumheller: Common Questions
Can the walls be done without opening them? Sometimes, and on this stock we are cautious about it. With board sheathing and no membrane, injected foam can reach the back of the cladding, and nobody can see what is in a closed bay.
When is the right time to insulate walls? When the finish is off for another reason. A re-side, a gut renovation or a repair after foundation movement makes this a fraction of its stand-alone cost.
What is actually in a wall of this age? Irregular framing, gapped board sheathing, often no membrane, and either nothing in the cavity or an old batt that has slumped to the bottom.
How much does wall spray foam insulation cost in Drumheller? It follows the sprayed area and depth, but on walls the opening up and the reinstatement usually cost more than the foam. Ask for those as separate lines so you can see the real split.
How do I choose a wall spray foam contractor in Drumheller? Ask what they intend to do about the plates, the rough openings and any balloon-framed cavities. A quote that prices only the cavity fill has skipped the part that changes how the house feels.
Set the depth with the R-value calculator, then get a free Drumheller quote. More on Wall Spray Foam Insulation Alberta province-wide.