Why downspout extensions & drainage works differently in St. Catharines
St. Catharines sits in a freeze-thaw belt, and freeze-thaw is what quietly takes apart masonry, flashing and venting.
Older St. Catharines 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 Halton than the manufacturer's rating assumes.
Across Ridley, Glenridge, Western Hill, Grantham and Old Glenridge, 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 Welland Canal, the practical takeaway is that a downspout extensions & drainage 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.