Aurora conditions that change how chimney waterproofing is done
Most Aurora homeowners book chimney waterproofing for one reason and discover a second problem on the same visit.
Wind loading off Lake Ontario pushes driving rain against the south and west faces of a house, which is why water entry so often shows up on one side of a Aurora home and nowhere else.
Post-war subdivisions across York share the same construction generation, so when one street starts showing the same defect, the neighbours usually follow within a couple of seasons.
Across Aurora Estates, Kennedy Street West, Bayview Northeast, Hills of St Andrews and Bayview Southeast, 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.
the practical takeaway is that a chimney waterproofing 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.

