Medicine Hat has the oldest housing stock of any major city in Alberta, which means it also has the widest range of wall assemblies - and the widest range of right answers. Wall spray foam insulation in Medicine Hat is applied to the oldest wall assemblies in the province.
Know which era you are in before touching a wall
Pre-war and early post-war walls were built without a vapour barrier, often with minimal or no cavity insulation, and many have survived precisely because they can dry freely in both directions. Sealing one up without understanding it is the one genuine risk in this city's older streets. The damage is slow, hidden inside the assembly, and expensive.
1960s-70s walls typically have batt in the cavity and an inconsistent or partial barrier. These are the most common retrofit candidates and usually the most straightforward.
1980s onward generally have a poly vapour barrier as standard. Here the question flips: adding a second vapour-resistant layer inside the cavity can leave the wall unable to dry in either direction.
Three eras, three different correct decisions. The most useful thing you can tell an installer is roughly when the house was built.
The dry-climate advantage
Medicine Hat is one of the driest places in the country, and that genuinely helps. Lower ambient humidity means less moisture available to be driven into wall assemblies, so the consequences of an imperfect vapour strategy are less severe here than on the coast or in a humid climate.
Less severe is not none. It reduces the risk; it does not remove the need to understand the assembly.
Still not the first job
Even with old walls, the attic and rim joist come first. They are open, inspectable, cheaper, and they address the stack effect that drives air through the whole building. In a city where the cheap-gas era left the easy wins untaken, there is usually a lot of value available before anyone opens a wall.
The moments worth acting on
A renovation or re-side, while the cavity is open and visible. Cheapest by a wide margin, and the only approach where coverage can be confirmed rather than assumed.
A specific problem wall - a room that stays cold after the attic and basement are sorted, usually an exposed corner or a wall over an unheated space.
Injecting a closed wall
Possible, and a genuinely different job from spraying an open cavity: different material behaviour, no visual confirmation, no way to inspect afterwards. It suits some houses and not others - injecting spray foam into existing walls covers the trade-offs.
Wall Spray Foam Insulation Medicine Hat: Why Work With Us
Alberta's spray foam specialists. We see the building before we price it.
No price without a site visit, and in a pre-war house we would rather look before recommending anything.
Wall Spray Foam Insulation Medicine Hat: Common Questions
Is it worth doing walls on a house this old? Medicine Hat has the oldest stock of any major Alberta city, and in those walls the gap between the nominal R-value and the real performance is widest.
Do the walls have a vapour barrier? Often not, or not an intact one. Closed cell becoming a vapour retarder at about 38 mm is what makes that manageable rather than a problem.
Should I do walls before the attic? Usually not. Walls need access, so they are done when a wall is open anyway; the attic and rim joist come first on cost per result.
How much does wall spray foam insulation cost in Medicine Hat? Knowing which era the wall is from comes before touching it, because that decides whether it can be sealed at all. Walls are still not the first job on most houses, so the honest number here is often for something else.
Best wall spray foam insulation contractor in Medicine Hat? Ask whether the walls are really the right first job on your house. In the Hat the answer is usually no, and the moments when it is yes are specific and identifiable.
Get a quote, and tell us roughly when the house was built.
See also wall insulation province-wide and when not to use spray foam.