Sarasota Siding Homeowners in Sarasota ask us about LP SmartSide often enough that we think it deserves a straight answer instead of a sales pitch. It's a legitimate product with real engineering behind it, and plenty of contractors install it well. We don't. This page explains what LP SmartSide actually is, where it performs fine, where it runs into trouble in a Gulf Coast climate, and why we standardized on James Hardie fiber cement for every siding job we take on in Sarasota County.
What LP SmartSide Actually Is
LP SmartSide is an engineered wood product. The core is strand-based, similar in concept to OSB, made from wood strands bonded with resin under heat and pressure, then treated with a zinc-borate solution (LP calls it SmartGuard) to resist fungal decay and termites. The surface gets a factory-applied primer, and in some product lines a full factory finish. It's manufactured to look like traditional wood lap siding or panel siding, at a lower installed cost than fiber cement in most markets, and it's noticeably lighter to handle on a job site.
LP has improved this product significantly since the OSB siding failures of the 1990s that gave engineered wood siding a bad name industry-wide. The current SmartGuard treatment and resin formulation are a real step up from that era, and LP backs the product with a limited warranty. We're not disputing any of that. The question for us isn't whether LP SmartSide is a scam or a bad product in general — it's whether it's the right call for a home three miles from Sarasota Bay.
Where It Performs Reasonably Well
In drier, more moderate climates — think the upper Midwest or inland regions with real winters and lower ambient humidity — LP SmartSide has a solid track record when installed correctly and maintained on schedule. The wood-strand core is engineered to resist the swelling and rot that plagued older wood composite products, and manufacturers have gotten better at controlling moisture content during production.
The Core Issue: It's Still Wood
Every improvement LP has made addresses symptoms of the same underlying fact — the core material is organic. Wood strands, resin-bonded or not, absorb and release moisture, and that absorption happens fastest at any point where the factory coating is compromised: a cut end, a nail penetration, a scratch from a ladder or a lawn crew. In a climate with wind-driven rain, near-constant humidity, and a hurricane season that runs six months a year, those exposed edges take on water more often and dry out more slowly than they would in a drier region.
Sarasota County sits on the Gulf, which means salt-laden air working on every exterior surface year-round, plus the intense UV load that comes with Florida's latitude beating down on the same walls. UV degrades exterior coatings over time regardless of substrate, but on an engineered wood product the stakes of a coating failure are higher — once moisture gets past a failed coating into a strand-board core, you're dealing with swelling and eventual decay, not just a cosmetic problem.
Installation Sensitivity
LP SmartSide's warranty and performance both depend heavily on installation details that are easy to get wrong and hard to inspect after the fact: every cut edge in the field needs to be primed or sealed before installation, clearances above grade, decks, and roof lines need to be maintained exactly, and caulking at every joint, corner, and penetration has to be done correctly and then re-done as it ages. Skip or rush any of that on a house exposed to Sarasota's rain and salt air, and the failure mode isn't a paint touch-up — it's swollen, delaminating siding that has to be replaced in sections.
We install a lot of siding, and installation sensitivity like that is exactly the kind of risk we've decided not to carry, both for the homeowner's sake and our own. A product that performs fine when every field cut is sealed and every caulk joint is perfect is a product that performs only as well as the crew's discipline on a given afternoon.
Maintenance Burden Over Time
LP SmartSide is not a "paint it once and forget it" product, even with a factory finish. Homeowners are expected to keep an eye on caulked joints, touch up any coating damage promptly, and repaint on a cycle that's shorter than what fiber cement needs. That's a reasonable ask in a mild climate. In Sarasota, with salt air accelerating coating wear and a rainy season that makes it hard to schedule touch-up work, that maintenance cycle compresses. We've found that most homeowners don't actually keep up with it — not because they're careless, but because exterior maintenance schedules are easy to let slide, and a strand-wood product doesn't forgive that the way a cement-based product does.
Fire Behavior
It's worth being direct about this one: LP SmartSide is a wood product and is combustible, even with its treatments. That's a real consideration for insurance underwriting in some cases and simply a fact homeowners should weigh, not a defect specific to LP — it's true of any wood siding. We mention it because it's one more line item where fiber cement and engineered wood aren't equivalent products wearing different price tags; they behave differently in ways that matter.
LP SmartSide vs. James Hardie: A Straight Comparison
| Factor | LP SmartSide (engineered wood) | James Hardie (fiber cement) |
|---|---|---|
| Core material | Resin-bonded wood strand, organic | Cement, sand, cellulose fiber — inorganic |
| Moisture behavior | Can swell/delaminate if coating is breached | Does not swell or rot from moisture exposure |
| Combustibility | Combustible (wood-based) | Non-combustible |
| Field-cut edges | Must be primed/sealed on-site | Sealed per Hardie's published detail, less failure-prone |
| Finish | Factory primer or finish; repaint cycle needed | ColorPlus baked-on finish, long repaint interval |
| Typical installed cost | Lower | Higher |
| Warranty structure | Limited warranty, conditions on maintenance/installation | Non-prorated limited warranty; ColorPlus finish warranty separate |
| Salt-air / coastal fit | Requires disciplined maintenance to hold up | Engineered HZ product lines built for humid, coastal exposure |
Why We Standardized on James Hardie
James Hardie fiber cement is made from cement, sand, and cellulose fiber — there's no wood strand core to absorb water, swell, or feed rot. It doesn't burn. It holds up to the freeze-thaw cycles other regions worry about and, more relevant here, it holds up to sustained humidity, salt air, and wind-driven rain without the same maintenance dependency. Hardie also makes climate-specific product lines (their HZ5 line, for example) engineered for exactly the humid, high-moisture coastal conditions Sarasota sits in — that's a manufacturer acknowledging regional climate matters, which lines up with what we see on job sites.
The ColorPlus factory finish is baked on and warranted separately from the substrate, which means the coating and the board are backed together rather than the homeowner carrying the coating maintenance burden alone. And because the core material can't swell or delaminate at cut edges the way engineered wood can, correct field installation still matters — flashing, clearances, fastening — but the consequences of a small installation miss are far less severe than on a moisture-sensitive substrate.
None of this means LP SmartSide is a bad product for every application. It means that for the specific combination of conditions a Sarasota home faces — hurricane-force wind events, months of high humidity, salt air off the Gulf, and intense UV — we don't think an engineered wood product is the standard we want to put our name behind. Fiber cement is.
What to Ask Before You Choose a Siding Product
- What is the core material, and is it organic or inorganic?
- What does the manufacturer's warranty actually require of you to stay valid (maintenance cycle, inspection, installer certification)?
- Is there a product line engineered specifically for humid, coastal, or high-wind climates like Sarasota's?
- How are field cuts and joints sealed, and how forgiving is the product if that detail is imperfect?
- What's the realistic repaint or recoat interval given local sun and salt exposure, not the manufacturer's general climate average?
- Is the installer certified or specifically experienced with this exact product, not just siding in general?
Our Standard, Not a Universal Rule
We want to be clear about what this page is and isn't. It isn't a claim that LP SmartSide is defective or that every installation of it fails — plenty of homes around the country wear it fine. It's an explanation of our professional standard: after years of installing and repairing siding on Gulf Coast homes, we've concluded that engineered wood products carry more moisture risk and maintenance dependency than we're willing to build into a job in this climate. James Hardie fiber cement lets us install a product where the core material itself isn't the weak point, in a climate that doesn't give exterior materials many breaks.
If you're weighing siding options for a home in Sarasota, Siesta Key, or anywhere else in Sarasota County, we're happy to walk through what we see in the field and why we'd put Hardie on your house. Reach out for a free, no-pressure estimate and we'll give you a straight answer about what your home actually needs.