The local factors behind chimney repointing & brick repair in Ajax
Ask any technician who works Ajax routes and they will tell you the same thing: the callbacks cluster in a handful of predictable places.
Post-war subdivisions across Durham share the same construction generation, so when one street starts showing the same defect, the neighbours usually follow within a couple of seasons.
Infill and renovation work in Ajax frequently reroutes venting without re-sizing it, and undersized or over-long runs are the single most common cause of poor draft we see.
Across Downtown Ajax, Duffin's Bay, Ajax Waterfront, West Ajax and Northeast Ajax, 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 repointing & brick repair 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.

