Spray Foam vs Batt Insulation in Vancouver: Which Is Better?
Spray Foam vs Batt Insulation for Vancouver Homes
The choice between spray foam and batt (fibreglass or mineral wool) insulation significantly impacts both cost and building performance. In Vancouver’s wet climate, moisture management is the critical factor in this decision.
Cost Comparison
| Type | Cost/sq ft (installed) | R-Value/inch |
|---|---|---|
| Fibreglass batt | $0.80–$1.50 | R-3.2 |
| Mineral wool batt | $1.20–$2.00 | R-3.7 |
| Open-cell spray foam | $1.50–$2.50 | R-3.6 |
| Closed-cell spray foam | $3.00–$5.50 | R-6.5 |
Best Application by Location
- Above-grade walls: Mineral wool batt preferred in Vancouver — moisture-tolerant, fire-resistant, good acoustic performance. $1.20–$2.00/sq ft.
- Attic: Blown-in cellulose or fibreglass — best cost/R-value ratio. $1.50–$2.50/sq ft.
- Basement/crawl space: Closed-cell spray foam — handles moisture, air seals simultaneously. $3.00–$5.50/sq ft.
- Rim joists: Closed-cell spray foam — critical air sealing location, small area. Best use of spray foam budget.
- Garage ceiling: Open-cell spray foam or mineral wool batt.
The Vancouver Moisture Factor
Vancouver’s climate requires vapour management thinking. Closed-cell spray foam is both insulation and vapour barrier — excellent for below-grade and exterior walls. Fibreglass batt in Vancouver walls MUST be paired with a proper vapour barrier and drainage plane to prevent wall cavity moisture issues.
→ See also: Vancouver Renovation Planning Guide
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