Oakville conditions that change how roof moss & algae treatment is done
If you mapped our Oakville 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 Halton share the same construction generation, so when one street starts showing the same defect, the neighbours usually follow within a couple of seasons.
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.
Across Westmount, Bronte East, Falgarwood, Ford and Iroquois Ridge North, 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 downtown Oakville, the practical takeaway is that a roof moss & algae treatment 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.

