What makes roof inspection in Toronto its own problem
Homes in Toronto rarely fail all at once — they fail slowly, through one heating season at a time.
Air-sealing and window upgrades have made Toronto homes far tighter than they were designed to be, and a tight house starves a natural-draft appliance of the make-up air it needs.
Older Toronto 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.
Across Lawrence Park, Greektown, The Danforth, Forest Hill and Leaside, 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 CN Tower, the practical takeaway is that a roof inspection 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.

