Mississauga sits in a freeze-thaw belt, and freeze-thaw is what quietly takes apart masonry, flashing and venting.
Older Mississauga stock was built when soft lime mortar and clay liners were the standard; modern high-efficiency appliances vent very differently, and the mismatch causes condensation the original builder never planned for.
Salt spray and road grit carried by winter wind accelerate corrosion on exterior metal components far faster in Peel than the manufacturer's rating assumes.
Across Sheridan, Dixie, Sheridan Park, City Centre and Port Credit, 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 Square One, the practical takeaway is that a dryer vent risk 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.