The local factors behind roof winter prep in Niagara-on-the-Lake
Two houses on the same Niagara-on-the-Lake street, built the same year, can need completely different roof winter prep work — and usually do.
Range hoods and basement bathroom fans routinely out-pull an older flue, so the house depressurises and the flue reverses — a Niagara-on-the-Lake problem that looks like a chimney fault but starts elsewhere in the building.
Snow load and ice damming stress the roof-to-wall junction each winter; by spring the sealant that was doing the work has usually torn.
Across Randwood, Chautauqua, Garrison Village, Line 4 and Queenston, 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 Shaw Festival, the practical takeaway is that a roof winter prep 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.