Supported through Natural Resources Canada’s Local Energy Efficiency Partnerships (LEEP) initiative, the project transformed three townhouse buildings (11 units) into a net-zero energy ready community while generating performance data to inform future retrofit projects across Canada.
RDH provided building enclosure consulting for the project, helping develop, evaluate, and monitor high-performance enclosure assemblies designed to significantly reduce energy demand while improving durability. Five different exterior wall retrofit strategies were implemented using a range of insulation systems, each paired with improved airtightness, triple-glazed windows, upgraded attic and foundation insulation, and comprehensive air sealing. The project established enclosure performance targets of approximately R-28 effective walls, R-60 attics, and R-20 basement walls while achieving the airtightness required for the Canadian Home Builders’ Association Net Zero Energy Ready program.
Beyond design and construction, RDH developed a comprehensive monitoring program to evaluate long-term enclosure performance. Sensors installed throughout the wall, roof, and foundation assemblies measure temperature, moisture content, and relative humidity, allowing the team to compare the performance of multiple retrofit strategies and validate hygrothermal modelling. The resulting data is helping improve industry understanding of deep energy retrofits, supporting future design guidance for durable, low-energy existing buildings.
