The Room Above
When the room upstairs never comes up to temperature, the insulation in the floor dividing it from the garage is the reason. That cavity is open to outdoor air on three sides and fibreglass insulation in it achieves very little, because air simply flows around it.
Closed cell spray foam insulation in that cavity seals and insulates together. It is among the most noticeable single improvements available to a house, because the change in that room shows up straight away.
The same insulation approach holds for a floor that overhangs the storey below, or a room built above an open porch.
Attached And Detached Are Different Jobs
Where a garage adjoins the house, the party wall is a fire separation as well as an insulated one, so both the insulation going on it and the finish covering it matter.
A detached garage or shop is its own building. Walls and roof both want insulation, and the roof is where the value of the spray foam insulation sits if there is any intention of heating it.
Overhead doors leak regardless of what you do around them. We will tell you plainly what the door is costing you and whether it deserves attention before or after the spray foam insulation.
Heating It Afterwards
Sealed and insulated, a garage becomes a space a small heater can genuinely hold. Before the insulation goes in, heating one is close to heating the yard.
If a workshop, a gym or a woodshop is the plan, say so at quote stage. The depth of spray foam insulation we specify differs depending on whether you want to work in there in February or simply want the room above to stop being cold. Product choice for a heated garage is covered on the closed cell and open cell spray foam page.
Covering And Finishing
Spray foam insulation in a garage that gets used falls under the same covering requirement as anywhere else people spend time, with half inch board the usual answer.
Most people finish a garage anyway, so boarding over the insulation is often work already on the list. We will tell you where the rule applies before you set the budget.