Largo Siding Every so often a homeowner in Largo asks us to quote Cemplank fiber cement siding instead of James Hardie. It's a fair question — Cemplank is a real fiber cement product, sold through some of the same big-box channels homeowners already shop at, and it's usually priced a bit lower than Hardie. We want to answer it honestly rather than just say "we don't do that."
What Cemplank Gets Right
Cemplank is fiber cement, not vinyl or wood composite. That matters. Fiber cement as a category holds up far better than vinyl siding in Pinellas County's combination of hurricane-force wind gusts, wind-driven rain, and salt-laden air off the Gulf. It doesn't melt against a hot grill, it resists termites and woodpeckers, and it takes paint or a factory finish without the warping problems you get with wood or engineered wood products. On paper, Cemplank and James Hardie are the same category of material, and Cemplank shouldn't be dismissed as a "cheap" product in the way vinyl or primed spruce can be.
Where the Two Products Actually Diverge
The differences that matter to us as installers, and to you as a homeowner living through Florida weather, show up in the details — not in the raw material.
Factory Finish and Field Track Record
James Hardie's ColorPlus finish has been baked, tested, and revised through multiple generations specifically against UV breakdown and coastal humidity — the two things that wreck a paint job fastest in a place like Largo. Hardie has decades of finish data from installations across Gulf Coast counties, including plenty within a few miles of salt water. Cemplank's factory finish and primed options exist, but the volume of long-term, coastal-specific field history simply isn't as deep. When a product's finish is what stands between your siding and 300+ days of Florida sun a year, we want the longest track record we can get.
Climate-Engineered Product Lines
Hardie builds separate HZ (HardieZone) product formulations for humid, high-moisture climates versus dry climates, and Pinellas County sits squarely in the wet-climate engineering. That's not a marketing label — it changes the substrate formulation itself. We haven't seen Cemplank offer that same level of climate-specific product segmentation, which matters more here than in most parts of the country.
Installer Network and Manufacturer Support
Hardie runs a formal contractor training and certification program, with installation specs that get updated for wind zones and coastal exposure. That gives us documented, manufacturer-backed guidance for fastener schedules, clearances, and flashing details in a hurricane-wind-load area — and it gives you a paper trail if something ever needs to be addressed under warranty. Cemplank's dealer and installer support network, at least in our market, is thinner. Fewer trained installers means more variability in how the product actually gets hung, and variability is exactly what you don't want in a house that has to survive hurricane season every year.
Warranty Structure
Both companies offer transferable limited warranties, but the terms, documentation requirements, and what's covered on the finish versus the substrate differ. Hardie's warranty paperwork and claims process are ones we've worked with directly, on real installations, for years. We're not going to sell you a warranty we can't personally vouch for having stood behind.
Side-by-Side, Plainly
| Factor | Cemplank | James Hardie |
|---|---|---|
| Material | Fiber cement | Fiber cement |
| Climate-specific engineering | Limited | HZ5 wet-climate formulation |
| Factory finish track record | Shorter, less coastal data | Multiple generations, Gulf Coast-tested |
| Local certified installer network | Thinner | Established |
| Typical price point | Somewhat lower | Somewhat higher |
Why This Is Our Standard, Not a Knock on the Product
We're not telling you Cemplank is a bad product — it's a legitimate fiber cement siding, and plenty of homes around the country wear it just fine. What we're telling you is that as a company that installs siding on homes exposed to Pinellas County's mix of intense UV, salt air, and hurricane-season wind and rain, we've chosen to put our name behind the product with the deepest climate-specific engineering, the longest finish track record in this exact environment, and the installer support system we can vouch for firsthand. That's James Hardie, and it's the only fiber cement siding we install.
If you're weighing Cemplank, Hardie, or anything else for your Largo home, we're happy to walk you through it in person. Reach out for a free, no-pressure estimate — we'll look at your home's exposure and give you a straight answer, not a sales pitch.