Why gutter & eavestrough installation works differently in Port Hope
What makes gutter & eavestrough installation in Port Hope 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.
The swing between a January cold snap and a February thaw can move a masonry assembly enough to open joints that looked sound in the fall.
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 Elizabethville, Ganaraska, Toronto Road, Hope Township and Canton, 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 gutter & eavestrough installation 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.

