- Had a place right on the water—galvanized screws looked fine for a year, then boom, orange streaks everywhere.
- Tried stainless, lasted longer but still needed a check every season. Salt just finds a way.
- Even my “coastal rated” metal roof needed touch-ups after storms. Flashing and fasteners are always the weak spots.
- Shingles are less hassle for rust, but like you said, if the wind gets under them, you’re patching leaks anyway.
- Maintenance is just part of the deal... I keep a checklist and budget for touch-ups every spring.
Salt air is relentless, isn’t it? I’ve managed a few properties right on the coast, and every time I think I’ve outsmarted the corrosion, nature just laughs and proves me wrong. Galvanized fasteners are basically a temporary fix—one good storm and you’re chasing rust stains down the siding. Stainless does buy you more time, but like you said, it’s not invincible. I’ve even seen “marine grade” hardware start to pit after a couple seasons if you don’t rinse things off regularly.
I do think some of the newer coated fasteners are worth a look, though. There’s a ceramic-coated screw (can’t remember the brand off the top of my head) that’s held up better than anything else I’ve tried, at least for decks and trim. For roofs, I’ve started specifying aluminum fasteners where possible—less strength than steel, but they just don’t rust the same way. Downside: they’re pricier, and you have to watch for galvanic corrosion if they touch other metals.
And yeah, flashing is always the first spot to fail. I’ve had decent luck with peel-and-stick membranes under the metal in those areas, just as an extra layer of insurance. It’s not foolproof, but it buys you some time between storms and touch-ups.
Shingles are less of a rust headache, but I swear coastal wind has a personal vendetta against them. Last hurricane season, we lost a whole row off one building—looked like someone peeled back a sardine can. Insurance adjuster said he’d seen worse, but that didn’t make me feel any better.
Honestly, I just factor in annual maintenance as part of the rent now. If you’re near salt water, there’s no such thing as “maintenance-free.” You can slow it down with better materials and regular inspections, but eventually, the ocean always wins. At least it keeps things interesting...
I’ve inspected plenty of coastal roofs where even “marine grade” hardware didn’t hold up the way you’d expect. One place had stainless screws that looked fine on the surface, but when I pulled a few, the threads were already corroding. The peel-and-stick under flashing does seem to help, but I’m always skeptical about how long it really lasts in that environment. I do wonder if anyone’s tracked how ceramic coatings perform over 5-10 years—seems promising, but I haven’t seen enough long-term data yet.
That’s been my experience too—hardware that looks fine on the outside but is basically toast underneath. I’ve started requesting fasteners with double coatings, but even then, it’s a gamble this close to the water. The ceramic stuff sounds good in theory, but like you said, I haven’t seen enough roofs with it past year five to really trust it yet. For now, I just budget for more frequent inspections and faster replacement cycles. The salt air just wins eventually...
Salt air’s a real menace—seen plenty of “pristine” roofs where the screws are basically rust dust holding hands. I’ve had some luck with stainless fasteners, but even those eventually give up the ghost. Honestly, I tell folks to treat coastal roofs like they’re on a five-year plan...anything longer is just wishful thinking. Ceramic coatings might be the next big thing, but until I see one survive a decade out here, I’m not betting my clipboard on it.
