Ajax conditions that change how ice dam prevention is done
Most Ajax homeowners book ice dam prevention for one reason and discover a second problem on the same visit.
Many Ajax properties were re-roofed at least once without the flashing being re-detailed, leaving a cosmetic seal doing structural work.
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.
Across Northwest Ajax, Northeast Ajax, South Ajax, Downtown Ajax and Duffin's Bay, 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 ice dam prevention 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.