Vaughan conditions that change how shingle replacement & roof replacement is done
If you mapped our Vaughan service calls on a calendar, you would see the same shape every year: the problems are created in February and paid for in November.
Many Vaughan properties were re-roofed at least once without the flashing being re-detailed, leaving a cosmetic seal doing structural work.
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.
Across Concord West, Rainbow Creek, Rutherford, Sonoma Heights and Elder Mills, 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 Vaughan Metropolitan Centre, the practical takeaway is that a shingle replacement & roof replacement 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.