Insulate London
InsulationLondon
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How Much Does Insulation Cost in Ontario?
Insulation costs in Ontario depend on the type (batt, blown-in, spray foam), area being insulated, and current R-value being upgraded from. Attic top-up with blown-in cellulose is the most cost-effective upgrade. Spray foam is the most expensive but provides an air barrier in addition to insulation value.
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Insulation Services Kingston
InsulationKingston
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Insulation Services Kingston
InsulationKingston
Checking owner claim…Phone on file
Quick Price Summary
Average insulation job in Ontario costs around $1,701 CAD. Actual costs depend on scope, materials, and your city.
| Service | Low | Average | High | Unit |
|---|---|---|---|---|
| Attic Insulation | $1,500 | $3,000 | $6,000 | average home attic |
| Batt Insulation | $1 | $2 | $3 | per sq ft |
| Spray Foam | $3 | $5 | $8 | per sq ft |
| Blown In | $1,500 | $2,500 | $4,500 | full attic |
| Basement Walls | $1,500 | $3,000 | $5,000 | full basement |
All prices in Canadian dollars (CAD). Updated February 2026. Prices vary by city and project scope.
Insulation Cost Ranges
Attic Insulationaverage home attic
$1,500$3,000 avg$6,000
Batt Insulationper sq ft
$1$2 avg$3
Spray Foamper sq ft
$3$5 avg$8
Blown Infull attic
$1,500$2,500 avg$4,500
Basement Wallsfull basement
$1,500$3,000 avg$5,000
What Affects Insulation Pricing?
- 1Type of insulation (batt, blown-in, spray foam, rigid board)
- 2Area — attic, walls, basement, crawlspace
- 3Current R-value and how much upgrade is needed to meet OBC or grant requirements
- 4Whether existing insulation needs removal (damaged, mould, vermiculite/asbestos)
- 5Vapour barrier work required
- 6Blower door test required for grant programs
When Are Insulation Prices Lowest?
Best Time to Save
March-May — after winter rush, before summer renovation rush
Peak Pricing
October-November — homeowners panic before winter
How to Save on Insulation Work
- Canada Greener Homes Grant covers up to $5,600 for insulation upgrades — get a pre-assessment first
- Blown-in attic insulation is the highest ROI upgrade (heat rises)
- DIY batt insulation in accessible attics is feasible and saves 60-70% of labour
- Bundle with an energy audit — auditors often have installer networks with reduced rates
- Cellulose blown-in is cheaper than fibreglass blown-in and performs similarly
Payment Schedule & Protection
Recommended: 10-15% deposit, progress payments tied to milestones, 10% holdback until completion
Ontario Law: Ontario's Construction Act provides a 10% holdback right on construction projects. Read the Construction Act →
Licensing: No mandatory Ontario licence. Insulation contractors in Ontario are not regulated but should carry liability insurance and WSIB. Spray polyurethane foam (SPF) insulation requires trained and certified applicators under the Canadian Urethane Foam Contractors Association (CUFCA). Insulation upgrades may qualify for Canada Greener Homes Grant rebates.
Frequently Asked Questions — Insulation Costs
- How much does insulation work cost in Ontario?
- Attic Insulation: $1,500-$6,000 (average home attic). Batt Insulation: $1-$3 (per sq ft). Spray Foam: $3-$8 (per sq ft). Blown In: $1,500-$4,500 (full attic). Basement Walls: $1,500-$5,000 (full basement). All prices are in CAD and approximate for Ontario.
- What factors affect insulation pricing in Ontario?
- Type of insulation (batt, blown-in, spray foam, rigid board). Area — attic, walls, basement, crawlspace. Current R-value and how much upgrade is needed to meet OBC or grant requirements. Whether existing insulation needs removal (damaged, mould, vermiculite/asbestos). Vapour barrier work required. Blower door test required for grant programs.
- When is the cheapest time to hire a insulation contractor?
- Prices typically drop during: March-May — after winter rush, before summer renovation rush. Prices rise during: October-November — homeowners panic before winter.
- How can I save money on insulation work?
- Canada Greener Homes Grant covers up to $5,600 for insulation upgrades — get a pre-assessment first. Blown-in attic insulation is the highest ROI upgrade (heat rises). DIY batt insulation in accessible attics is feasible and saves 60-70% of labour.
- Should I get multiple quotes?
- Always get at least 3 written quotes. Compare scope, materials, timeline, and warranty — not just price. The cheapest quote often means corners cut.
- How much deposit should I pay?
- 10-15% deposit, progress payments tied to milestones, 10% holdback until completion. Ontario's Construction Act provides a 10% holdback right on construction projects.
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