What a Summit County winter does to the masonry overhead
A chimney in Stow takes punishment that has nothing to do with how many fires you light. The brick stands fully exposed to the entire arc of a Northeast Ohio year, the humidity that rolls in off Lake Erie in summer, the long soaking rains of a wet October, and then the relentless freeze and thaw that defines an Akron-metro winter. Brick and mortar are porous by nature, so they soak up moisture during every damp stretch, and the instant that trapped water turns to ice it swells and forces the masonry apart from within. Each hard overnight freeze widens the gaps a fraction more, and the crown at the very peak, the single most weather-beaten surface on the whole stack, is almost always the first piece to surrender.
The burning season layers on a second and entirely separate kind of wear. Every wood fire leaves creosote behind on the inner wall of the flue, a sticky, combustible residue that piles up in layers and squeezes the channel the smoke has to climb. A flue even lightly glazed with hardened creosote is both a fire risk and a draft problem at the same time, because the same coating that can ignite also strangles the airflow the fire needs to draw. The two forces attack from opposite ends at once, water and ice working the structure downward from the crown while creosote climbs upward from the firebox, which is exactly why a Stow chimney needs to be looked at on a schedule rather than only after something has plainly gone wrong.