Bonus room spray foam insulation in Vermilion is a smaller slice of the work than it is in a subdivision city, because a town where about 74% of the housing predates 1991 does not have many purpose-built bonus rooms. What it does have is attached garages added later, with a room framed over the top of them, and that is a harder version of the same problem.
The room over the garage is a floor, not a ceiling
People report it as the upstairs being cold, so they ask about attic work. The actual assembly is a heated room sitting on a floor that has unheated garage underneath and outside air at the ends. Heat leaves downward into the garage, sideways out of the cantilever or the end wall, and through the sloped ceiling if the room is tucked under the roof. Insulating the attic above it changes almost nothing, because the attic was rarely the dominant loss.
An addition joins two buildings that were framed differently
When the garage and the room above it were added to an older house, the floor system of the addition meets the wall of the original house at a joint that nobody insulated, because it was an exterior wall right up until the day it stopped being one. That joint is often open into the garage ceiling cavity, which is open to the end wall, which is open to the sloped ceiling above. The result is a continuous path from the garage into the room, and warm air leaving the room the whole time. Foam is the only practical way to close it, because the gap is irregular and nothing cut to size will fit it.
Why batts in a garage ceiling usually fail
A garage ceiling is one of the easiest places for batts to go wrong. They sag off the subfloor, leaving an air space directly under the finished floor, and a garage is vented, cold and often windy when the door is open. Air moves through the gap above the batt and the floor above it never warms up. Closed-cell foam sprayed up to the underside of the subfloor at about R-6 to R-7 per inch adheres to it, so there is no gap left for air to run in, and it seals the joist ends at the same time.
The slope and the knee wall
If the room is partly under the roof, the sloped ceiling needs a continuous insulated and sealed plane from the top plate up to the ridge, with ventilation above it or a fully adhered assembly with none. The small vertical knee walls at the sides are the other common failure: on the room side they are finished, on the back side they face unconditioned attic space with nothing sealing them. They behave like exterior walls and are almost never built like exterior walls.
Cold feet and a thermostat that lies
A bonus room over a garage frequently has one duct run and a thermostat somewhere else in the house, so the furnace satisfies the hallway and the room never catches up. Fixing the envelope changes what the room can hold once it gets there, but if the room has never been able to reach temperature, say so when you enquire, because the airflow question has to be answered alongside the insulation.
Who you are dealing with
You are dealing with the contractor directly on bonus room spray foam insulation Vermilion. We quote the job, we schedule it, and our own installers do the work.
Bonus Room Spray Foam Insulation Vermilion: Common Questions
Why is the room over the garage always the cold one? Because its floor has unheated garage under it and outside air at the ends, and the joint where the addition meets the original house is usually open.
We insulated the attic and it did not help. The attic was not the main loss. The garage ceiling, the joist ends and the knee walls are.
Do the garage walls need doing too? If the garage is heated or you want the floor above it to be comfortable, it helps. If the garage stays cold, the floor plane and the perimeter are the priority.
How much does bonus room spray foam insulation cost in Vermilion? Priced per board foot of sprayed area, so the garage ceiling area and the thickness set the base. Access through a finished ceiling is the variable that moves it most.
How do I choose a bonus room spray foam contractor in Vermilion? Ask whether they intend to treat the floor and the knee walls or just the ceiling above the room. On an added garage, the floor plane is the job.
Size the assembly with the R-value calculator, then get a free Vermilion quote. More on Bonus Room Spray Foam Insulation Alberta province-wide.