Markham conditions that change how chimney inspection is done
Homeowners in Markham tend to call us at one of two moments: the week before guests arrive, or the week after something started smelling wrong.
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.
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 Markham home and nowhere else.
Across Aileen-Willowbrook, Cachet, German Mills, Markham Village and Rouge River, 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 Main Street Unionville, the practical takeaway is that a chimney 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.

