What Are Garage Insulation Requirements in Calgary?
Alberta Building Code Standards for Calgary Garages
Garage insulation requirements in Calgary depend on whether the space is heated or unheated:
- Heated garages: R-20 minimum in walls, R-40 in ceilings (Alberta Building Code 9.25.3)
- Unheated garages: R-12 in walls, R-20 in ceilings
- Heated garage conversion to living space: Must meet residential standards (R-24 walls, R-40 ceilings)
Vapour Barrier and Moisture Control
Calgary’s temperature swings and dry winters create condensation risks in garages. The Alberta Building Code requires:
- Polyethylene vapour barrier on the warm (interior) side of insulation
- Minimum 6-mil thickness for effectiveness
- Proper sealing at seams and penetrations to prevent air leakage
- Mechanical ventilation in heated garages to manage humidity
City of Calgary Permit Requirements
If you’re insulating a heated garage or converting it to conditioned space, you need:
- Building permit from City of Calgary (required for all heated garage work)
- Professional inspection before drywall installation
- Final inspection after completion
- Permit costs typically range from $150–$300
Typical Calgary Insulation Costs
| Insulation Type | R-Value | Cost per sq ft |
|---|---|---|
| Fiberglass batts | R-20 | $0.50–$0.75 |
| Blown cellulose | R-20 | $0.65–$0.85 |
| Spray foam (closed-cell) | R-20 | $1.50–$2.50 |
| Rigid foam boards | R-20 | $1.00–$1.50 |
Why It Matters in Calgary
Our harsh winters and temperature fluctuations demand proper insulation to prevent ice dams, frozen pipes, and condensation damage. Inadequate insulation voids warranties and fails City of Calgary inspections.
Get your garage insulation project started with OAF Construction