Insulation is one of the highest-ROI upgrades for Ottawa homes, with payback periods as short as 2-5 years through reduced heating and cooling costs. Ottawa's extreme climate — from -30°C to +35°C — makes proper insulation essential for both comfort and energy efficiency. Attic insulation: blown-in cellulose or fiberglass costs $1.50-$3.00 per square foot, with a typical 1,000 sq ft attic costing $1,500-$3,000. This is the single most cost-effective insulation upgrade because heat rises and an ...
Spray foam insulation comes in two types. Closed-cell spray foam ($4-$7 per square foot at 2-inch thickness) provides the highest R-value per inch (R-6 to R-7), acts as both insulation and air/vapour barrier, and adds structural rigidity. It's ideal for basement walls, rim joists, and cathedral ceilings. Open-cell spray foam ($2-$4 per square foot) has a lower R-value (R-3.5 per inch) but costs less and is excellent for soundproofing. Blown-in cellulose ($1.50-$2.50 per square foot for attics) ...
The Ontario Building Code specifies minimum insulation levels for Ottawa (Climate Zone 6): ceiling/attic R-60, above-grade walls R-24 (effective), basement walls R-20, and below-grade (slab) R-10. These are minimums — exceeding them provides additional energy savings and comfort. Many existing Ottawa homes fall far below current standards. Homes built before 1980 may have as little as R-12 in the attic and R-8 in the walls. Bringing these homes up to current standards is one of the most impactf...
The Canada Greener Homes Grant offers up to $5,000 for insulation upgrades. Eligible improvements include: attic insulation (up to $1,800), exterior wall insulation (up to $5,000), basement insulation (up to $5,000), and air sealing (up to $1,000). To qualify, you need a pre-retrofit EnerGuide evaluation ($300-$600) and a post-retrofit evaluation. The evaluator tests your home's air tightness and insulation levels, then recommends upgrades and verifies the work was completed. Enbridge Gas offe...
DIY attic insulation (blown-in) is feasible for handy homeowners. Many Ottawa building supply stores rent blowing machines for $50-$100 per day when you purchase the insulation. A 1,000 sq ft attic costs $400-$800 in materials for a DIY blown-in job vs $1,500-$3,000 installed professionally. DIY considerations: you'll need proper safety equipment (respirator, goggles, protective clothing), adequate ventilation in the attic, and knowledge of what not to cover (recessed lights without IC rating, ...
Attic blown-in costs $1,500-$3,000 for a typical home. Wall insulation costs $3,000-$7,000. Basement insulation costs $3,000-$8,000. Spray foam is the most expensive at $4-$7/sq ft but provides the highest R-value per inch.
Closed-cell spray foam is the highest-performing option (R-6-7 per inch) and ideal for basements and rim joists. For attics, blown-in cellulose or fiberglass is most cost-effective. The best choice depends on the application and budget.
Upgrading from minimal to code-level insulation can reduce heating costs by 20-40%, saving $500-$1,500 annually on a typical Ottawa home. Attic insulation alone can save 10-20% on heating costs.
Yes, the Canada Greener Homes Grant offers up to $5,000 for insulation. Enbridge offers additional rebates for gas-heated homes. Combined rebates can cover 30-50% of your insulation upgrade cost.
Current Ontario Building Code requires R-60 in the attic for Ottawa (Climate Zone 6). This equals approximately 16-20 inches of blown-in cellulose or fiberglass. Many older homes have R-12 to R-30 and should be topped up.