Roof Leak Detection in British Columbia

Roof leaks are one of the most common and frustrating problems for property owners in British Columbia, where the combination of heavy rainfall, snow accumulation, freeze-thaw cycles, and moss growth creates a uniquely challenging environment for roofing systems. A roof leak rarely appears directly below its point of entry — water enters at one location, runs along roof decking, trusses, or insulation, and finally drips at a point far from the breach. This makes roof leak detection particularly challenging and is why the first repair attempt often fails. At LeakInspection.ca, we take a systematic approach to roof leak detection that traces water from its visible interior manifestation back to its exterior entry point.

Our roof leak detection process begins with an interior inspection using thermal imaging cameras. Wet insulation and saturated roof decking have different thermal properties than dry materials, creating distinct thermal patterns that our cameras can detect even through finished ceilings. We scan the ceiling surface, attic spaces, and roof cavities to map the full extent of moisture migration. This thermal map guides us to the most likely entry zone. For flat roofs and low-slope roofs common on commercial and multi-family buildings, we deploy infrared roof scanning technology that can survey the entire roof surface quickly, identifying wet insulation and membrane breaches that are invisible to the naked eye.

For steep-slope residential roofs, we combine thermal interior scans with exterior visual inspection of flashing details, roof penetrations (vents, chimneys, skylights), valley conditions, and shingle integrity. We pay particular attention to the common failure points that BC's wet climate exposes: deteriorated step flashing at wall junctions, failed sealants around pipe boots, ice damming damage at eaves, and moss-related shingle and underlayment deterioration. In cases where the leak remains elusive, we employ flood testing of roof sections or tracer gas testing of the membrane system. Our comprehensive report documents the findings with thermal images, exterior photographs, and a clear explanation of the leak path and recommended repairs.