What makes chimney relining (stainless) in Port Hope its own problem
Homes in Port Hope rarely fail all at once — they fail slowly, through one heating season at a time.
Older Port Hope stock was built when soft lime mortar and clay liners were the standard; modern high-efficiency appliances vent very differently, and the mismatch causes condensation the original builder never planned for.
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.
Across Old Port Hope, Hope Township, Ganaraska, Penryn and Welcome, 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 relining (stainless) 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.