Basement Insulation

A well-insulated basement means a more pleasant and functional space. Our spray foam insulation ensures your basement stays comfortably warm — even in the chilliest Ottawa winters — while resisting the moisture that can plague below-grade walls.

Basements Lose More Heat Than People Expect

An uninsulated basement can account for a substantial share of a home's heat loss, and the rim joist at the top of the foundation wall is one of the leakiest details in the whole house. Concrete and block are poor insulators and highly conductive, so without a thermal break the foundation is drawing heat out of the building all winter.

• Closed-cell foam applied directly to the foundation wall
• Rim joist sealed and insulated in the same pass
• No stud cavity required, so you keep floor area
• Acts as its own vapour retarder at sufficient thickness
• Ready for framing and drywall straight afterwards

Moisture Is the Real Risk

Traditional batt insulation against a basement wall is a common cause of mould, because warm indoor air reaches the cold concrete behind it and condenses. Closed-cell foam bonds to the wall so there is no gap for air to reach, and at sufficient thickness it controls vapour as well. If the basement has an active water problem, that has to be fixed first: foam manages vapour, not liquid water coming through the wall.

Turning a Basement Into Usable Space

Most people insulate a basement because they want to use it. Once the walls and rim joist are sealed, the space holds its temperature, feels dry rather than damp, and is quiet enough for a bedroom, office or media room. It is far easier and cheaper to do this before the space is finished than to open it up again later.