Sarasota Siding What LP SmartSide Actually Is
LP SmartSide is an engineered wood siding product. Instead of solid lumber, it's made from wood strands bonded with resin under heat and pressure, similar in concept to OSB sheathing, then treated with a zinc borate additive for termite and fungal resistance and finished with a primer or factory coating. It comes in lap siding, panels, and trim, and it has a real following among builders because it's lighter than fiber cement, easier to cut and nail, and generally less expensive installed.
We're not writing this page to trash the product. LP has improved it over the decades and it performs reasonably well in a lot of parts of the country. Our issue isn't that LP SmartSide is a bad product in the abstract — it's that we don't think it's the right product for homes in Sarasota County, and we won't install something on your house that we wouldn't be comfortable standing behind for the next 30 years in this specific climate.
The Core Problem: It's Still Wood
Zinc borate treatment and resin binders change how wood-based siding resists rot and termites, but they don't change the fundamental material. LP SmartSide is a cellulose product. Cellulose absorbs moisture, and when it absorbs enough moisture repeatedly, it swells, softens, and eventually breaks down — even with treatment slowing that process down.
That matters more here than almost anywhere else in the country. Sarasota sits on the Gulf Coast with year-round humidity, a long wet season, salt-laden air moving inland off the water, and wind-driven rain during tropical storms and hurricanes that gets forced sideways into joints, seams, and butt ends that a north Florida or Midwest installation might never see under that kind of pressure.
Where Moisture Gets In
- Cut ends and field-trimmed edges that lose their factory seal and go unpainted or under-sealed
- Butt joints and seams where two boards meet, especially if caulking isn't maintained
- Nail penetrations where the factory coating has been broken
- Areas with poor flashing or clearance above rooflines, decks, and grade
- Panel edges around windows, doors, and penetrations where sealant has aged out
Every one of these is manageable with meticulous installation and a homeowner who keeps up with caulking and repainting on schedule. The problem is that "meticulous" and "on schedule" are doing a lot of work in that sentence, and most siding failures we've seen on wood-based products trace back to one of those two things slipping, not to a defective board.
Installation Sensitivity Is the Real Cost
LP SmartSide is more forgiving to install than fiber cement in some ways — it's lighter, cuts faster, and doesn't generate the same silica dust. But it's less forgiving in the ways that matter most for a 20-30 year lifespan. Every cut end needs to be primed and sealed in the field, every seam needs correct caulk and gap spacing, and nailing patterns and clearances have to be followed closely because the manufacturer's warranty is written around those details. Skip a step that a homeowner will never see once the house is finished, and you've created a moisture entry point that won't show a problem for years.
We install a lot of siding in this county, and we see the downstream result of shortcuts more often on engineered wood systems than on fiber cement, because fiber cement is simply more tolerant of small installation imperfections. That's not a knock on every crew that installs LP SmartSide — plenty do it correctly. It's a statement about margin for error, and in a hurricane-exposed coastal county, we'd rather build in margin than rely on perfect execution holding up for three decades.
Maintenance Burden Over Time
LP SmartSide requires an ongoing paint and caulk maintenance cycle to keep its moisture barrier intact. Depending on sun exposure and how the factory finish holds up, that typically means repainting on a cycle measured in single-digit years, plus periodic recaulking of seams and trim joints. Skip a cycle or two — which happens constantly with rental properties, second homes, and busy families — and you're not just risking a cosmetic issue. You're risking water getting behind the cladding.
Sarasota's UV load is intense almost every month of the year, which accelerates coating breakdown on any painted exterior product. Combine that with salt air along the coast and barrier islands, and the maintenance clock runs faster here than it would in a milder, drier climate. Homeowners considering LP SmartSide should go in with eyes open about what the upkeep actually looks like, not just what the product costs installed.
Termites Are a Real Florida Consideration
Zinc borate treatment gives LP SmartSide meaningful resistance to termites and fungal decay, and it's a legitimate improvement over untreated wood siding. We're not claiming otherwise. But Sarasota County, like the rest of the Gulf Coast, has a heavy subterranean and drywood termite presence, and any wood-based exterior product is a material that termites are biologically inclined to test. Fiber cement contains no cellulose for termites to feed on at all, which removes that variable from the equation entirely rather than managing it with a treatment that can be locally compromised at a cut edge or damaged surface.
LP SmartSide vs. James Hardie Fiber Cement
| Factor | LP SmartSide (engineered wood) | James Hardie (fiber cement) |
|---|---|---|
| Base material | Wood strands + resin binder | Cement, sand, and cellulose fiber, cured |
| Moisture behavior | Absorbs and can swell if seals fail | Dimensionally stable, doesn't swell/rot |
| Termite resistance | Zinc borate treated (helps, not immune) | Non-organic, not a termite food source |
| Combustibility | Combustible (wood-based) | Non-combustible |
| Finish maintenance | Repaint/recaulk on a recurring cycle | ColorPlus factory finish holds color longer between repaints |
| Coastal/wind performance | Depends heavily on installation discipline | Engineered HZ lines built for high-wind, high-moisture zones |
| Typical installed cost | Generally lower | Generally higher |
| Warranty structure | Varies, often prorated over time | Long-term, non-prorated on many Hardie lines when installed to spec |
Why We Standardized on James Hardie Instead
We made a decision a while back to stop installing multiple siding systems and standardize on one product we trust completely for this climate: James Hardie fiber cement. It's not wood, so moisture-driven swelling and rot aren't in play, and it's not a food source for termites, which matters in a county where both subterranean and drywood termites are a fact of life. It's non-combustible, which is a genuine safety consideration many homeowners don't think about until it's pointed out. Hardie's HZ5 product line is engineered specifically for climates like ours — high humidity, heavy rain, and storm exposure — rather than being a general-purpose siding adapted after the fact.
The ColorPlus factory finish is baked on in a controlled environment rather than field-applied, which means better adhesion and a longer stretch before repainting is needed, and Hardie backs its products with a strong, transferable limited warranty when installation follows their specifications. None of this makes Hardie maintenance-free — no siding is — but it shifts the maintenance burden from "constant vigilance on paint and caulk" to "periodic inspection and normal upkeep."
Standardizing on one product also means our crews install it constantly. They know the fastening patterns, the clearances, the flashing details, and the joint treatments cold, because it's what they do every day, not one system among several. That repetition is part of what closes the installation-sensitivity gap we talked about above.
What to Ask Any Contractor Before Choosing Engineered Wood Siding
- What's the manufacturer's actual warranty language on moisture damage, and is it prorated?
- Who is responsible for sealing cut ends in the field, and how is that verified?
- What's the recommended repaint/recaulk interval for this specific climate, in writing?
- Is the crew installing this product daily, or occasionally alongside several other systems?
- How does the product's fire rating compare to non-combustible alternatives?
- What does the manufacturer say about installation in high-wind, coastal, or HVHZ-adjacent zones?
If a contractor can't answer these clearly and specifically, that's worth paying attention to — regardless of which siding product you're considering.
The Honest Bottom Line
LP SmartSide isn't a scam or a defective product. It's a reasonable, lower-cost option that performs adequately when installed with discipline and maintained on schedule. Our decision not to install it is about what we're willing to put our name behind for the long haul on homes exposed to Sarasota's combination of intense UV, salt air, high humidity, termite pressure, and hurricane-force wind and rain. We'd rather install fewer products extremely well than several products adequately, and for our crews, that product is James Hardie.
If you're weighing siding options for a home in Sarasota, Siesta Key, Lakewood Ranch, or anywhere else in Sarasota County, we're glad to walk through what we see in this climate and why we recommend what we do. Reach out for a free, no-pressure estimate — we'll give you a straight answer, whether that means Hardie or a referral elsewhere.