Why smoke chamber parging works differently in Brock
Brock sits in a freeze-thaw belt, and freeze-thaw is what quietly takes apart masonry, flashing and venting.
Air-sealing and window upgrades have made Brock homes far tighter than they were designed to be, and a tight house starves a natural-draft appliance of the make-up air it needs.
Salt spray and road grit carried by winter wind accelerate corrosion on exterior metal components far faster in Durham than the manufacturer's rating assumes.
Across Wilfrid, Beaverton, Sonya, Sunderland and Gamebridge, 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 smoke chamber parging 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.