What makes roof cleaning in Cambridge its own problem
Homes in Cambridge rarely fail all at once — they fail slowly, through one heating season at a time.
The swing between a January cold snap and a February thaw can move a masonry assembly enough to open joints that looked sound in the fall.
Salt spray and road grit carried by winter wind accelerate corrosion on exterior metal components far faster in Halton than the manufacturer's rating assumes.
Across West Galt, East Galt, Christopher Champlain, Riverside and Blair, the housing stock changes street by street, and the correct method changes with it. A century home with a soft-brick stack does not get the same treatment as a 2010 build with a factory-built vent — using one method on both is how systems get damaged.
If you live anywhere near the Grand River, the practical takeaway is that a roof cleaning visit should start with an assessment, not a tool. Any crew that begins work before telling you what they found is guessing on your behalf.