Thermal bridging is important to consider for all buildings as it can have a significant impact on a building’s thermal enclosure performance. It is an especially important part of energy modelling retrofit projects as modelling typically requires calibration to utility bills or measured end-uses. For buildings considering a deep energy retrofit such as those participating in Enbridge’s Savings by Design program, consideration of thermal bridging is required to determine the enclosure performance upgrades and their relative impact on energy use.