We get a call about once a quarter from a new coastal-property owner who just bought a bluff-top home and has the wrong mental model about maintenance. They've underwritten the deal with inland-property maintenance assumptions. Then the salt air starts catching up with the deferred items.
Here's the honest version.
Salt air corrodes exposed metal
Anything ferrous — nails, screws, exterior light fixtures, garage door springs, HVAC condenser fins, gas line components, water heater straps — corrodes faster within 1-2 miles of the Pacific. The closer to the surf line, the faster.
What we do: annual exterior inspection in late fall (after summer fog, before winter storms) checking every exposed metal component. Anything corroded or pitted gets replaced with stainless or galvanized equivalents.
Wood weathers, then rots
Cedar siding, redwood decking, painted trim, and exterior doors all weather faster in salt air. The first sign is fading; the second is checking (small splits along the grain); the third is rot.
What we do: every five years, full exterior wash, sanding of weathered surfaces, and recoating with marine-grade exterior paint. Bluff-top properties we coordinate every three years.
HVAC condensers are the most-asked-about
Outdoor HVAC condenser units have aluminum fins that corrode in salt air. The fins clog with salt deposits, airflow drops, the system overworks. By year 6-8 a coastal HVAC condenser is usually 30% less efficient than its inland equivalent at the same age.
What we do: annual condenser-fin wash with a low-pressure freshwater rinse, plus a coil-cleaner application. Coastal condensers also get coated fins (a one-time $200-400 upgrade at install) when we replace.
Roof and gutters
Coastal roofs (especially asphalt shingle and standing-seam metal) accumulate salt deposits and need annual freshwater cleaning. Skipping this for 3-5 years results in premature roof aging.
What we do: annual gutter clean and roof inspection in November, with photo documentation in the owner statement.
What this means for the underwriting
A bluff-top coastal property's annual maintenance reserve should be 2-3% of property value (vs. 1-1.5% for an inland equivalent). Don't underwrite a Cardiff bluff-top home at Carlsbad-La-Costa maintenance assumptions.
More questions? Talk to an owner advisor — Theo handles maintenance coordination across our portfolio and is happy to walk through a specific property's salt-exposure profile.
A spring checklist
March is when the marine layer thins and the first long sun stretches show up. It's also when half the salt damage from the previous winter finally makes itself known. Here's what to look at, in order of how much it'll cost if you don't.
The roof first. Walk the perimeter with a phone camera and photograph anything that's lifted, cracked, or stained. We'll come look — usually within a week — and give you a no-pressure estimate.
Then the windows. Salt and grit eat the seals on west-facing units faster than anything else. If you can hear a whistle from inside on a windy afternoon, the seal is gone.
Finally, fixtures. Anything brass, copper, or zinc — door hardware, faucet bodies, light housings — should get a quick wipe with a damp cloth and a once-over for green corrosion. The fix is usually a $40 part and twenty minutes.
— Theo Reyes