Dunedin sits right on the water — St. Joseph Sound to the west, the Dunedin Causeway running out toward Honeymoon Island and Caladesi Island, and a shoreline that puts a lot of homes within a mile or two of salt spray even if they're not technically "waterfront." That salt-laden air is hard on exterior materials in ways that don't show up in a brochure. It works into seams, fasteners, and any exposed edge, and it does it faster than most homeowners expect. Add in the humidity that sits over the whole Tampa Bay area for most of the year, and you've got a climate that's genuinely tough on siding — wet-dry cycling, mildew growth in shaded north-facing walls, and UV breakdown on the sun-facing side of the same house.
Then there's storm season. June through November, Dunedin homes take wind-driven rain, and every few years something bigger. Siding isn't just a cosmetic layer here — it's the first line of defense for the wall assembly behind it. When it fails, water gets behind it, and that's when small problems turn into sheathing and framing repairs.
We treat a home near the causeway or along Edgewater Drive differently than one further inland near Curlew Creek or off Keene Road. Closer to the water, salt exposure and wind-driven rain are the bigger threats. Further inland, it's more about sustained humidity, tree canopy shading that keeps walls damp longer, and irrigation overspray hitting the lower courses of siding day after day. Either way, the material has to hold up to Florida moisture — it just fails differently depending on where your lot sits.
Dunedin has a real mix of housing stock, and it shows in the siding calls we get. There are the historic bungalows and Florida vernacular homes in and around downtown, many original from the mid-20th century with old wood clapboard or later hardboard siding that's been painted over more times than anyone can count. There are mid-century block homes with a strip of wood or hardboard on gables and dormers. And there's newer construction near the water and in the developments further east, often already sided in vinyl or an engineered wood product that's now 15-20 years into a Florida climate it wasn't built for.
The failure patterns are predictable once you've seen enough of them:
None of that is a knock on the original builders — it's just what 30, 40, sometimes 60 years of Gulf Coast weather does to materials that weren't engineered for it.
We made a decision a long time ago to stop installing vinyl, LP SmartSide, and other engineered wood products, and we haven't gone back. It's not that those products can't work anywhere — it's that we don't think they hold up to what Dunedin's climate does to a house over 20-plus years, and we'd rather build something once than have a homeowner call us back in a decade with the same problems we just fixed.
James Hardie fiber cement is cement, sand, and cellulose fiber. It doesn't have an organic wood component for moisture to feed on, so it doesn't rot, delaminate, or attract termites the way wood and hardboard products can. It doesn't soften and sag in heat the way vinyl can on a west-facing wall in July. And it carries a real engineered wind rating, which matters when you're this close to open water.
The most common choice for Dunedin homes — a traditional lap profile that reads as classic Florida coastal or bungalow style depending on the reveal width and trim details. Available in smooth or cedar-textured finish.
Shingle profile works well on gables, dormers, and accent areas on the historic bungalow-style homes downtown. Panel siding gives a clean, modern look that's popular on newer coastal builds and additions.
Factory-applied, baked-on color finish rather than field-applied paint. It resists fading and chipping better than a job-site paint job, which matters in a climate where UV exposure is intense nearly year-round. It also means less repainting over the life of the siding.
| Material | Moisture/Rot Resistance | Wind Performance | Long-Term Maintenance |
|---|---|---|---|
| James Hardie Fiber Cement | Excellent — non-organic, won't rot | Engineered, high wind ratings | Low; ColorPlus finish resists fading |
| Vinyl | Won't rot, but seams let moisture behind panels | Can crack, warp, or blow off in high wind | Fades and becomes brittle with UV/heat exposure |
| LP SmartSide / Engineered Wood | Wood-based; vulnerable to moisture intrusion at cuts and joints | Decent when new, degrades with edge swelling | Needs vigilant caulking and repainting |
| Traditional Wood Clapboard | Poor in humid coastal climates without constant upkeep | Fair; fastening degrades over time | High — regular painting, patching, pest monitoring |
This isn't a claim that competing products are junk everywhere they're used — vinyl and engineered wood are common products for a reason, and they work fine in a lot of climates. It's a statement about our own standard for what we're willing to install on a Dunedin roofline, given the salt air, humidity, and storm exposure we deal with every season.
Every Dunedin home is a little different, so we don't quote off a flat per-square-foot number without seeing the house. The main variables:
| Cost Factor | Why It Matters |
|---|---|
| Home size and wall complexity | Dormers, gables, and multiple roof pitches add cutting, flashing, and labor time |
| Condition of the existing wall | Rotted sheathing found during tear-off means repair before new siding goes up |
| Siding profile and accessories | Shingle accents, trim boards, and corner details cost more than a plain lap job |
| ColorPlus color selection | Standard color line vs. premium/custom colors affects material pricing |
| Tear-off and disposal | Removing old wood, hardboard, or vinyl and hauling it off is part of every full replacement |
We'll walk the whole exterior with you, point out anything we find that affects scope, and give you a written number before any work starts — no surprise change orders sprung on you mid-job.
We inspect the current siding, check for water damage or soft sheathing at typical trouble spots (window sills, bottom courses, roof-to-wall intersections), and talk through profile and color options before we ever write a number.
Old siding comes off down to the sheathing. This is the point where hidden rot or water damage gets found and fixed — patching it now is far cheaper than discovering it in five years.
Proper house wrap and flashing at every window, door, and penetration go on before a single piece of Hardie board. This is the layer that actually keeps wind-driven rain out, and it's the step that gets skipped on rushed jobs.
Fastener spacing, joint treatment, and clearances follow James Hardie's installation guidelines, not a shortcut version. Correct installation is what the product warranty depends on.
We go around the house with you, check trim and caulking lines, and make sure everything's clean before we call it done.
Pinellas County wind requirements aren't a formality here — Dunedin's proximity to open water means real wind loads during a tropical system. James Hardie siding carries engineered wind ratings, but the rating only means something if the installation matches it: correct fastener type, spacing, and embedment, proper starter strip, and flashing that actually sheds water instead of trapping it. We install to those specs on every job, not just the ones near the water. If your homeowner's insurance asks for documentation on exterior upgrades, a fiber cement replacement done to code is generally a stronger answer than a like-for-like vinyl swap.
If you're seeing more than one of these, it's worth a look before the next named storm rather than after.
Downtown Dunedin's historic district and several older neighborhoods have architectural review guidelines that can affect siding profile, reveal, and color choices on visible elevations — something a lot of out-of-town crews don't think to check before they show up with material. We pull the required Pinellas County and City of Dunedin permits on every full siding replacement and handle the paperwork so you're not the one chasing it down. Alpine Exteriors is a licensed Florida contractor (RB29003900), and we carry that license into every job we do in Dunedin, not just the paperwork stage.
If your siding is showing its age — or you just want an honest opinion on what shape it's in — we're happy to come take a look. Reach out through the form below for a free, no-pressure estimate.
A single-family home in Dunedin usually takes one to two weeks from tear-off to final trim, depending on size and how much substrate repair is needed underneath the old siding. Weather during hurricane season can add a few days if we have to pause for rain.
Ask to see their Florida license number, proof of liability insurance and workers' comp, and whether they pull permits themselves or expect you to. Also ask what happens if they find rotted sheathing during tear-off — a contractor without a clear answer to that question usually hasn't done many of these jobs.
We settled on James Hardie fiber cement as our standard because it holds up better to Gulf Coast salt air, humidity, and storm-driven rain over the long run than vinyl or engineered wood products in our experience. It's a decision about durability in our specific climate, not a claim that other products can't work elsewhere.
HardiePlank is traditional horizontal lap siding, the most common choice for full-house coverage. HardieShingle mimics a shingle look and is often used as an accent on gables or dormers, while HardiePanel is a vertical, flat-panel option popular for a cleaner, more modern exterior. All three carry the same fiber cement durability, just different profiles.
It can — properties in and around the downtown historic district may have architectural guidelines covering siding profile, reveal width, and color on street-facing elevations. We check this during the estimate so you know what's allowed before we order material, rather than finding out after a permit gets kicked back.