Introduction
Picture a February morning in Georgina. The thermostat says 21°C, the furnace is humming, yet the wall by the couch feels icy, and a faint draft brushes past your ankles. The room never feels hot, no matter how high the heat is set. The hydro bill continues to climb, and it is difficult to explain why.
That scene is a classic example of thermal bridges and micro air leaks at work. These are the invisible paths where heat slips out of a house and cold sneaks in, even when the walls look “well insulated.” In many Canadian homes, thermal bridges and tiny gaps can cause 15–30% of all heat loss. They create cold spots, stubborn drafts, and those walls in the house that never seem to warm up.
