Basement Insulation in Scarborough, Ontario
Foundation walls and rim joists insulated to stop the cold floors, drafts and condensation that make a basement unusable half the year.
The local picture
Most Scarborough basements are original to the house, with uninsulated block foundation walls and cold floors above them. Where a basement has already been finished, we tell you plainly what can be reached without opening the walls.
Large volumes of 1950s–70s bungalows, side-splits and back-splits
Service details
How the job runs
Moisture check first
We look for water entry before insulating — sealing in moisture makes things worse.
Rim joist treatment
Sealed and insulated; this alone cuts a surprising share of total heat loss.
Wall system installed
Spray foam, rigid board or batt, chosen for the wall type and your finishing plans.
Finish-ready handover
Left clean and ready for framing or drywall if you are finishing the space.
What we see in these homes
- Attics still carrying their original insulation depth from the 1960s
- Unsealed top plates and pot lights leaking warm air upward
- Cold basements with uninsulated block foundation walls
- Bonus rooms and additions built over unheated space
Typical ranges
Basements are priced by what you are insulating — rim joists alone, foundation walls, or the whole envelope. Indicative market ranges below; moisture conditions can change the approach entirely.
Basement Insulation Cost in Toronto & the GTAQuestions about this service
Can you insulate a finished basement?
Sometimes, but access is limited. We will tell you honestly what can be done without opening walls.
Will insulation cause mould?
Only if it traps moisture. That is why we check for water entry before proposing a system.
Is it worth doing just the rim joists?
For many homes, yes — it is the cheapest meaningful improvement you can make down there.