The local factors behind chimney cleaning & sweep in Newmarket
Two houses on the same Newmarket street, built the same year, can need completely different chimney cleaning & sweep work — and usually do.
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 Newmarket 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 Yonge Corridor Newmarket, Copper Hills, Summerhill Estates, Huron Heights-Leslie Valley and Woodland Hill, 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 cleaning & sweep 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.

