Tampa Siding Two Different Materials, One Big Decision
When Tampa homeowners start researching siding replacement, two names come up more than any others: James Hardie fiber cement and LP SmartSide engineered wood. Both are marketed as upgrades over vinyl, both come with factory finishes, and both show up on plenty of Hillsborough County homes. But they are fundamentally different materials with different long-term behavior, especially in a climate that puts siding through hurricane-force winds, wind-driven rain, intense UV exposure, and salt-laden air almost year-round.
This page is a straightforward comparison of what each product is made of, how each performs under Tampa conditions, and why we made the decision to install James Hardie exclusively. We are not going to tell you LP SmartSide is a bad product — it isn't, and it has a loyal following in parts of the country where the climate is far less demanding. Our job is to explain the trade-offs honestly so you can make an informed call for your own home.
What Each Product Actually Is
James Hardie Fiber Cement
James Hardie siding is made from a mix of Portland cement, sand, and cellulose fibers, cured into a dense, rigid board. It contains no wood pulp that can absorb water and swell, and it is classified as non-combustible. Hardie's HZ5 product line is specifically engineered for Gulf Coast and hurricane-prone climates, with a formulation designed to resist moisture-related warping and cracking in high-humidity, high-rain environments like ours.
LP SmartSide Engineered Wood
LP SmartSide is an engineered wood product — strand board made from wood fibers, resins, waxes, and zinc borate (a treatment intended to resist fungal decay and insects), pressed and coated with a resin-saturated overlay. It is lighter than fiber cement, easier to cut on-site, and holds paint well when properly sealed. But at its core, it is still a wood-based product, and wood-based products behave differently around sustained moisture than cement-based ones.
How Each Performs in Tampa's Climate
This is the part that matters most for a Hillsborough County home. Tampa doesn't just get occasional rain — it gets sustained humidity, tropical downpours driven sideways by wind, salt air moving in off Tampa Bay and the Gulf, and some of the most intense year-round UV exposure in the continental United States. Every siding material on the market has to survive that combination for decades, not just look good on installation day.
Moisture and Humidity
Fiber cement's mineral composition means it does not absorb water the way wood-based products can. LP SmartSide's manufacturer builds in moisture protections — the resin overlay and zinc borate treatment are specifically there to address this — but the product's long-term performance depends heavily on every cut edge, seam, and fastener penetration being sealed correctly and staying sealed. In a climate where board are exposed to near-constant humidity and repeated wetting from storms, any gap in that sealing becomes an entry point for moisture over time. Fiber cement simply removes that variable from the equation.
Wind and Storm Exposure
Both products can be installed to meet Florida's wind-load and impact requirements when installed correctly, and both have engineered attachment systems for high-wind zones. The difference shows up less in a single storm and more over a decade of storm seasons — repeated wind-driven rain finds every weak point in a building envelope, and a material that doesn't swell, delaminate, or telegraph water damage at its edges holds its integrity through more cycles of that stress.
UV and Color Retention
Florida sun is brutal on exterior finishes. James Hardie's ColorPlus finish is a baked-on, factory-applied coating engineered specifically for UV resistance, and it's backed by its own dedicated finish warranty separate from the substrate warranty. LP SmartSide is typically factory-primed rather than finish-coated, which means the topcoat is field-applied paint — its fade resistance and lifespan depend on the paint product and application, not a factory-engineered finish system.
Salt Air
Homes closer to Tampa Bay, the Interbay area, or the barrier islands deal with a steady drift of salt-laden air. Salt doesn't rot fiber cement, and it doesn't feed fungal growth the way it can on any wood-based product with compromised sealing. This is a narrower but real consideration for waterfront and near-water properties across the Tampa area.
Side-by-Side Comparison
| Factor | James Hardie Fiber Cement | LP SmartSide |
|---|---|---|
| Core material | Cement, sand, cellulose fiber | Engineered wood strand, resin, zinc borate |
| Combustibility | Non-combustible | Combustible (wood-based) |
| Moisture behavior | Does not absorb/swell | Resists moisture when sealing is intact; wood-based |
| Finish type | Factory-baked ColorPlus finish | Factory primer, typically field-painted |
| Insect/rot resistance | Not a food source, no treatment needed | Zinc borate treated |
| Weight/handling | Heavier, cut with fiber cement tools | Lighter, easier field cutting |
| Typical warranty | 30-year non-prorated limited (varies by product line) | Manufacturer limited warranty, typically shorter on finish |
| Installation sensitivity | Requires correct fastening/clearance per Hardie spec | Requires strict sealing of cuts, edges, fasteners |
Installation Sensitivity Is a Real Cost Factor
Both products are what we'd call "installation-sensitive" — meaning a mediocre install can undercut the material's own advantages. But the failure modes differ. With fiber cement, most installation problems trace back to fastener spacing, clearance from grade or roofing, or improper caulking at joints — all fixable through correct crew training and adherence to Hardie's published specs. With LP SmartSide, the sensitivity is more fundamentally tied to the material itself: every field cut exposes raw substrate that must be primed and sealed before it's weather-exposed, and any missed edge becomes a long-term vulnerability that isn't always visible until years later. That puts more of the product's real-world durability in the hands of whoever is holding the caulk gun on a given day, which is a harder thing to guarantee across a large project.
Why We Standardized on James Hardie
We used to get asked why we don't offer LP SmartSide, vinyl, or a lower-cost fiber cement alternative alongside Hardie. The honest answer is that we made a business decision to install one product system and install it well, rather than spread our crews across multiple materials with different installation rules, different failure modes, and different warranty structures. For a climate like Tampa's — with hurricane risk, sustained humidity, intense sun, and salt exposure all stacked on top of each other — we concluded that fiber cement's inherent resistance to moisture and fire, combined with a factory-cured finish and a strong transferable warranty, gave homeowners the best long-term value with the fewest maintenance surprises. That's not a knock on every other product on the market. It's a reflection of what we've chosen to stand behind with our own installation crews.
Cost Considerations
LP SmartSide typically carries a lower material cost than James Hardie fiber cement, and that's a legitimate consideration for any homeowner working within a budget. Where the comparison gets more complicated is long-term cost: repainting cycles, caulk maintenance at seams and cut edges, and the labor involved in keeping any wood-based product properly sealed over 20-30 years all factor into the real lifetime cost of a siding investment. We'd rather walk you through those numbers honestly during an estimate than give you a broad-strokes price here — every home's square footage, trim detail, and current condition changes the math.
What to Ask Any Siding Contractor
- What product lines and thicknesses do you install, and why did you choose them?
- Are your installers factory-trained or certified on the specific product you're proposing?
- What does the manufacturer's installation spec require for fastener spacing, clearance, and flashing in a coastal wind zone?
- What's actually covered by the warranty — material only, labor, and is it transferable if you sell the home?
- How will cut edges, joints, and penetrations be sealed, and what maintenance will that require going forward?
- Can they show you the manufacturer's published wind and moisture ratings for your specific zone?
Making the Right Call for Your Home
If you're comparing James Hardie and LP SmartSide for a home in Tampa, Brandon, Riverview, or anywhere else in Hillsborough County, the right choice depends on your budget, how long you plan to stay in the home, and how much long-term maintenance you're willing to take on. We install James Hardie exclusively because it's the system we trust to hold up to what this climate throws at a house, year after year, with the least amount of homeowner upkeep required to keep that performance intact.
If you'd like an honest look at what a James Hardie replacement would involve for your specific home — product line, color options, and a real cost estimate — we're happy to walk the property and talk through it. The estimate is free, and there's no pressure either way.