Why chimney crown replacement works differently in St. Catharines
What makes chimney crown replacement in St. Catharines unusual is not the technique, it is the age spread of the housing: a single route can cover 1910 brick and 2019 factory-built venting.
Infill and renovation work in St. Catharines frequently reroutes venting without re-sizing it, and undersized or over-long runs are the single most common cause of poor draft we see.
Post-war subdivisions across Halton share the same construction generation, so when one street starts showing the same defect, the neighbours usually follow within a couple of seasons.
Across Fairview, Merritton, Lakeshore, Vansickle and Louth, 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 the Welland Canal, the practical takeaway is that a chimney crown replacement 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.