Home Efficiency Tools
Insulation Savings Calculator Canada — Energy Upgrade Payback
Calculate how much you'll save on heating by upgrading attic, wall, or basement insulation. Uses Canadian heating degree days and your fuel type. Free tool.
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Common questions
What R-value should attic insulation be in Canada?
National Building Code minimums for attic insulation range from R-40 in milder climates (Southern BC) to R-60 in colder regions (Prairies, Northern Ontario). Most Canadian homes built before 2000 have R-20 to R-30 in the attic — upgrading to R-50 or R-60 is one of the highest-return energy upgrades available.
How much does it cost to insulate an attic in Canada?
Blown-in cellulose or fiberglass attic insulation typically costs $1,500–$4,000 for a 1,200–1,500 sq ft attic, depending on thickness and existing insulation. Spray foam for rim joists or basement walls runs $3–$8 per square foot installed. The Canada Greener Homes Grant covers up to $5,000 in eligible insulation upgrades after a pre-retrofit EnerGuide evaluation.
What is the best type of insulation for Canadian homes?
For attics, blown-in cellulose (R-3.5/inch) or fiberglass (R-2.5/inch) are the most cost-effective. For exterior walls, rigid foam board (R-5/inch) or spray foam (R-6–7/inch) provide continuous insulation without thermal bridging. For basement walls, rigid foam or batt insulation between studs is common. The right choice depends on your climate zone and access constraints.
How do I know if my home is poorly insulated?
Signs of poor insulation include high heating bills, uneven room temperatures, ice dams on the roof in winter, and cold floors or walls. An EnerGuide home evaluation (required for Canada Greener Homes Grant) gives you an energy rating and identifies the highest-impact upgrades. Thermal imaging cameras (available for rent) can also reveal air leaks and insulation gaps.