From the Honeymoon Island causeway to the shops downtown, virtually all of Dunedin sits close to the water. There's no truly inland part of town: the onshore breeze off St. Joseph Sound carries fine salt across every rooftop, whether you're waterfront on the sound or tucked back near the Trail. That matters for chimneys, because salt is what turns a ten-year metal component into a five-year one.
The parts that pay the price are the ones you rarely look at: the cap, the chase cover, the spark screen, and the flashing where chimney meets roof. Rust streaks running down a chase, orange staining on shingles below the cap, or a screen that crumbles at a touch are common coastal warning signs. For chimney-cap replacement, material and sizing options should be evaluated for the system and site exposure and stated in the estimate.
Dunedin's Scottish roots go back to the 1800s, and it remains one of the older communities on the Pinellas peninsula, which means its housing, and its chimneys, span more than a century of building styles. Each era fails a little differently in salt air, and knowing which one you own is half the maintenance battle.
Exposure isn't uniform, either. Homes out toward the Honeymoon Island causeway and along the sound face the breeze head-on and see the fastest hardware wear in town, while streets tucked behind downtown get a slightly gentler version of the same treatment. Slightly gentler, not gentle. In a town this narrow, the difference is a year or two of component life, not a different climate. Either way, the maintenance calendar is the same: look at the metal every year, and replace it in something that can argue with salt when its time comes.