Why Toronto winters destroy brick and what to do before spring
Every winter, Toronto homeowners watch the same slow damage quietly unfold across their brick walls, chimneys, and facades. What begins as a hairline crack or a few loose chips of brick can develop into a serious structural problem long before spring arrives. Understanding why this happens is the first step to protecting your property. How the freeze-thaw cycle breaks down brick Toronto winters are punishing. Temperatures regularly swing above and below freezing dozens of times between November and March. Each time this shift occurs, moisture trapped inside brick and mortar expands as it freezes, then contracts as it thaws. Over time, this repeated stress fractures the internal structure of the brick. Mortar joints crack. Water finds new pathways into the wall. By spring, what once appeared to be a solid brick exterior can reveal serious hidden damage. This process, known as the freeze-thaw cycle, is the leading cause of brick deterioration in cold-climate cities across Ontario, and T...