Brock conditions that change how chimney cleaning & sweep is done
If you mapped our Brock service calls on a calendar, you would see the same shape every year: the problems are created in February and paid for in November.
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 Brock 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 Sonya, Wilfrid, Gamebridge, Cannington and Beaverton, 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.

