Calgary Staged Retrofit
This project aimed to enhance the building envelope to a net-zero standard in preparation for future mechanical system upgrades. Now, achieving net-zero is a realistic objective, with additional improvements planned as existing systems reach the end of their service life.
| Building Type | Single-Family 2+ Stories | Location | Calgary, AB |
| Year Built | 1975 | Foundation Type | Concrete (Full Basement) |
| Structure Type | Wood-Framed | Post-Retrofit Total Floor Area | 312m2 |
| Climate Zone | 7a | Heating Degree Days | 5000 |
| Retrofit Status | Complete | Year Completed | 2023 |
| Retrofit Phasing | Yes | Geometry Changed | No |
| Annual Energy Savings | 64.73% | Operational Carbon Savings | 7.87 tCO2eq/y |
| Retrofit Type | Envelope | Performance Level | Net-Zero Ready |
Project Team
- SNAP Building ( Builder )
- 4 Elements Integrated Design ( Energy Advisor )
Project Priorities
- Reduce Energy Consumption
- Increase Thermal Comfort
- Repair and/or Renew Exterior
Upgrades
Envelope Improvements
- Wall Insulation – Exterior – Larsen Truss
- Foundation Walls Exterior Insulation
- Air Sealing / Airtightness
- Air Barrier
- Exterior Cladding
Windows and Door Improvements
- Window Replacement – Triple Pane
Mechanical: Ventilation Improvements
- Heat Recovery Ventilator (HRV)
Renewables & Storage Improvements
- Solar PV System
Health, Safety & Sustainability Improvements
- Radon Mitigation
Project Description
The Retrofit Story
The homeowner decided to stage this retrofit in order to extend the life of his existing mechanical and solar thermal systems. A long-time advocate for solar energy, he installed Calgary’s first grid-tied system back in 2001.
The retrofit strategy focuses on maximizing the efficiency of the building envelope to minimize the size and capacity required for future mechanical upgrades.
With the implementation of a net-zero rated wall assembly, insulation of the foundation walls, and upgraded windows, the only remaining envelope improvement will be the roof and attic.
Getting to Net Zero
Upgrades to the attic and roof assemblies and air sealing at the attic level will improve the air tightness and reduce the heating and cooling loads. The final envelope improvements and upgraded mechanical systems will get the building to net-zero.
Before & After
General |
Envelope |
Mechanical & Electrical |
Annual Energy Usage |
Carbon Emissions |
Technical Documents
Photos
During Construction
Post Retrofit
