What a lakeshore winter does to a Mentor chimney
The chimneys we service in Mentor age on a clock set by Lake Erie. The lake-effect snow machine that runs off the water all winter dumps far more snow on this stretch of Lake County than the inland suburbs ever see, and that snow does not just sit on the roof. It packs onto the chimney crown, melts when the flue runs warm, seeps into hairline cracks in the brick and the mortar, and then freezes solid again when the fire dies down overnight. Repeat that cycle through a Mentor winter and water turns a cosmetic hairline into a fracture, lifts the face off the brick, and opens a path straight into the chase. The single most destructive force on a shoreline chimney is not fire. It is water riding the freeze.
Then there is the heating season itself, which runs long out here. A flue that is feeding a wood or pellet stove or an open fireplace from the first cold snap in fall through the late thaws of spring builds creosote the whole time, and the cooler, slower-drafting fires that the deep cold encourages lay it down faster. Creosote is the residue of incomplete combustion, it is flammable, and once enough of it coats the flue it becomes the fuel for a chimney fire. The long Mentor heating season and the water working from the outside are the two pressures we are built to stay ahead of, which is why we push so hard for a look before the cold rather than a scramble after the first problem shows up indoors.