About 66% of homes in Three Hills were built before 1991. In a town with a long-established college and the staff, students and families that come with it, a good share of that older stock is now occupied more densely than it was designed for — rooms let out, a basement in separate use, an upstairs with three people in it where the plan showed one. That is a building physics problem before it is anything else.
More people in a house means more water in the air
Every occupant is a continuous moisture source. So is every shower, every pot on the stove, every load of laundry hung indoors in February because it is thirty below outside. Double the occupancy of a house and you roughly double the water vapour being released into it, and nothing about the building has changed to deal with that. A 1960s house was built with a certain amount of accidental leakage and a certain occupancy in mind, and the two were in rough balance. Add people and the balance goes.
Where that moisture ends up
On the coldest surfaces. Window frames, which is why these houses have condensation and sometimes ice on the glass edges by January. The top corners of exterior walls on the upwind side. Inside wall cavities that have an air path into them. The underside of the roof sheathing above any ceiling opening, where it shows up as frost that melts in a thaw and gets reported as a roof leak. None of that is a fault in the occupants' behaviour and none of it is fixed by turning the heat up, which only moves more humid air through the building faster.
Why the air sealing comes before the insulation
Because air is the carrier. Insulation slows heat; it does nothing about air movement, and on a densely occupied older house the moisture is riding on the air. Sealing the ceiling plane, the rim joist and the wall-to-ceiling junctions gives the vapour nowhere to go into the structure, and sprayed foam does that sealing and insulating in a single continuous layer. Done in the right order, the house gets both warmer and drier. Done the wrong way round — depth added to a leaky ceiling — the owner pays and the frost stays.
And then the ventilation has to be deliberate
This is the part we say plainly on every densely occupied house. If the moisture is not leaving through the gaps any more, it has to leave on purpose. That means working bathroom fans that actually discharge outdoors rather than into the attic, a range hood that vents, and in a tighter house a planned source of fresh air. Sealing a house that is generating a lot of water vapour without giving it a route out moves the problem rather than solving it, and we would rather raise that before the work than after.
The order we would work a house like this
The rim joist first; it is the leakiest accessible strip in almost any house of this age and it can be done in part of a day. Then the ceiling plane, sealed before any depth is added. Then whichever specific room is the complaint — a bedroom over an unheated addition, a basement room by an outside stairwell, an upstairs under a shallow slope. Walls come last in most of these houses, not because they are good but because reaching the cavity means opening something, and the right moment for that is when the siding is coming off anyway.
Who you are dealing with
Residential spray foam insulation Three Hills is work we take care of ourselves. We scope it, we quote it, we schedule it, and our own installers are the ones holding the gun.
Residential Spray Foam Insulation Three Hills: Common Questions
We get condensation on the windows every winter. Is that an insulation problem? Partly. It is a sign the house is carrying more moisture than it can shed, which on an older house with several occupants is common. Sealing and deliberate ventilation are the two halves of the fix.
Does having more people in the house really change the specification? Yes. Occupancy sets the moisture load, and the moisture load decides whether sealing on its own is safe or needs ventilation alongside it.
Which job should we do first? The rim joist in nearly every case. It is the cheapest correct item and the one households notice soonest.
How much does residential spray foam insulation cost in Three Hills? It follows sprayed area and depth, plus access — whether anything has to be opened or removed to reach the surface. On a house of this age that access question is most of the gap between two quotes.
How do I choose a residential spray foam contractor in Three Hills? Ask what they intend to do about the moisture once the house is tighter. Somebody who only talks about R-value has only answered half of it.
Size the assembly with the R-value calculator, then get a free Three Hills quote. More on Residential Spray Foam Insulation Alberta province-wide.