Bonus room spray foam insulation in Drayton Valley is work on the room above an attached garage, and in this town that garage is rarely just a parking spot. It is where the quad gets fixed, where tools live and where a work truck comes in off a lease road with half a winter stuck to it. The room above inherits all of that, and the complaint always arrives the same way: the upstairs is cold and nobody can keep it warm.
The room has five cold sides, not one
A bedroom in the middle of a house has one exterior wall. A bonus room over a garage typically has a floor over an unheated space, two end walls exposed to outside, knee walls behind the sloped ceiling with vented attic on the far side, and a sloped or flat ceiling under the roof. That is five surfaces facing something cold, around a volume with one supply register in it. No amount of furnace capacity makes that comfortable, because the issue is surface area and air leakage rather than heat delivery.
The floor is the surface everybody insulates and nobody seals
There is usually batt pushed up between the floor joists over the garage, and it is usually drooping, leaving an air space against the subfloor. Air moves freely along that joist space from the garage side wall right through to the exterior rim, so the floor is both poorly insulated and connected to outdoor air. Closed-cell foam applied to the underside of the subfloor and out to the rim stops that, because it adheres to what is above it and leaves no gap for air to run in. In a garage that gets used as a workspace there is a second reason to seal that plane properly: anything in the air down there should not have a path into a bedroom.
The knee walls are the leak you cannot see
Behind the sloped ceiling on each side there is a small triangular attic, vented and at outdoor temperature. The knee wall between it and the room is often just drywall over batt with the joist cavity under the floor open into that space. Cold air gets into the triangle, into the floor cavity and under the carpet. Sealing the knee wall plane and the floor cavity ends at the same time is what actually changes how the room feels.
A loaded roof over a shallow sloped ceiling
Roofs here keep their snow instead of shedding it to the wind, so the sloped ceiling over a bonus room is working under a load and under a warmer-than-ambient deck all winter. Those rafter spaces are shallow, which means there is no room for both adequate depth and a generous vent channel using batt. Closed-cell at around R-6 to R-7 per inch gets more performance into the same depth, and because it seals as it insulates there is no warm moist air reaching cold sheathing in a space too tight to dry out.
Where the plumbing is, and what freezes
If there is a bathroom in or next to the bonus room, some of its pipework may run in the floor over the garage. That is the coldest cavity in the house, and it is the one people discover during a cold snap. Sealing the rim and the garage ceiling plane keeps that cavity on the warm side of the envelope, which matters more than the room's comfort.
Who quotes it and who sprays it
Bonus room spray foam insulation Drayton Valley 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.
Bonus Room Spray Foam Insulation Drayton Valley: Common Questions
Why is the room over the garage always the cold one? Because it is surrounded by cold on five sides while the rest of the house has one or two exterior walls, and the floor sits over an unheated bay.
Will insulating the garage ceiling be enough? Not on its own. The knee walls and the open ends of the floor joists let outdoor air into the floor, so the floor keeps feeling cold even after it is insulated.
Should we heat the garage instead? Some owners do, and it helps the room. It also means the garage envelope itself needs to be addressed, which is a bigger job than sealing the floor above it. Both are legitimate; they are different scopes.
How much does bonus room spray foam insulation cost in Drayton Valley? It is priced per board foot over the surfaces sprayed, so the number follows how many of the five planes are in scope and at what thickness. Access decides a lot of it: a floor sprayed from an open garage ceiling is straightforward, and the same job from inside a finished room is not.
How do I get a bonus room spray foam insulation quote in Drayton Valley? Say which room is cold and whether the garage below is heated or used as a shop, and we will look at the floor, the knee walls and the ceiling together. We quote it, schedule it and stand behind the work.
Size the assembly with the R-value calculator, then get a free Drayton Valley quote. More on Bonus Room Spray Foam Insulation Alberta province-wide.