What makes roof moss & algae treatment in Richmond Hill its own problem
Homes in Richmond Hill rarely fail all at once — they fail slowly, through one heating season at a time.
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.
Older Richmond Hill 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.
Across Headford, Rural Richmond Hill, South Richvale, Bond Lake and Bayview Hill, 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 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.