Lynden Siding What LP SmartSide Actually Is
LP SmartSide is an engineered wood siding product made from strand board — wood fibers bonded with resin under heat and pressure, then treated with a proprietary process (LP calls it SmartGuard) to resist moisture absorption, fungal decay, and termites. It's manufactured to look like traditional wood lap siding, comes pre-primed in most product lines, and is priced below fiber cement in most markets. For a lot of homes across the country, it's a reasonable siding choice. We just don't install it, and homeowners in Lynden deserve to know exactly why before they compare bids.
The short version: LP SmartSide is still fundamentally a wood product. It performs well when installation is flawless and maintenance never lapses. Whatcom County's climate — salt-tinged marine air, long stretches of driving rain, and a moss season that can run eight months of the year — doesn't offer much room for either to slip.
What LP SmartSide Gets Right
We're not going to pretend this is a bad product on paper. It has real strengths:
- Lighter weight than fiber cement, which can speed up install labor on some crews
- Comes pre-primed, reducing one prep step before field painting
- Resists impact damage reasonably well for a wood-based product
- Lower material cost than James Hardie fiber cement in most regional supply chains
- Manufacturer engineering (strand orientation, resin saturation) is a genuine improvement over old-school solid wood lap siding
If a homeowner's budget is the deciding factor and they're committed to a disciplined repainting schedule, LP SmartSide isn't a scam or a bad-faith product. It's a trade-off. Our job is to be honest about which side of that trade-off our climate lands on.
Where the Trade-Off Starts
Every wood-based siding, no matter how well engineered, depends on an intact protective surface — paint film, sealant at seams, caulk at every penetration — to keep water out of the wood fiber. Once that surface is compromised, even a good resin treatment is fighting a losing battle against sustained moisture. That's the entire equation we weigh against our local weather.
The Climate Problem: Lynden Isn't a Dry-Climate Market
LP SmartSide's engineering was designed to hold up against normal rainfall and humidity swings. Whatcom County isn't "normal" by national standards. We sit close enough to Puget Sound and the Strait of Georgia to get salt-laden air pushed inland on marine winds, on top of a rainy season that saturates siding for days at a stretch without a real drying window. Add in the shaded, damp microclimates common on tree-lined Lynden lots — the kind that grow moss on a roof in a single season — and you have a climate that's actively hostile to any siding relying on a paint film and caulk joints as its only moisture barrier.
What This Means in Practice
Wood strand siding that stays damp for extended periods, even with SmartGuard treatment, is more prone to:
- Edge and end-cut swelling, especially at field cuts that weren't fully sealed during installation
- Paint film failure at seams and butt joints first, since those are the first places water finds a way in
- Moss and algae growth on north-facing and shaded elevations, which holds moisture against the surface longer
- Slow-developing rot at the bottom courses, trim intersections, and anywhere flashing details were even slightly off
None of this means every LP SmartSide installation in Whatcom County will fail. It means the margin for error — in installation quality and in ongoing maintenance — is much thinner here than it is in a drier region.
Installation Sensitivity
LP SmartSide's manufacturer instructions are specific and, frankly, unforgiving: every field cut has to be primed and sealed before it goes on the wall, joints need the correct sealant and clearance, and fastener placement has to be exact to avoid splitting or over-driving. Skip any one of those steps — which happens more often than it should on production-paced crews — and you've created a moisture entry point that won't show a problem for a year or two, then shows up as soft, swollen siding that has to be replaced in sections.
We don't install LP SmartSide in part because we've made a standard decision to only put materials on homes where a single missed caulk line doesn't turn into a callback three winters later. Fiber cement gives us that margin. Engineered wood, done right, can perform — but "done right, every single time, forever" is a hard standard to guarantee on a product this installation-sensitive in a wet climate.
The Maintenance Commitment Homeowners Don't Always Hear About
This is the part that matters most for a Lynden homeowner comparing bids. LP SmartSide is a paint-dependent product. That paint film needs to be inspected regularly and recoated on a real schedule — not "whenever it looks bad," but proactively, before the film starts to chalk and crack. In a climate with this much rain and moss pressure, that often means more frequent recoating than a homeowner in Arizona or eastern Washington would ever need to think about.
Skipping or delaying that maintenance is exactly how wood-based siding gets a bad reputation — not because the underlying engineering is dishonest, but because the maintenance requirement to keep it dry is genuinely demanding, and most homeowners don't sign up for a siding product expecting to think about it every couple of years.
How LP SmartSide Compares to James Hardie Fiber Cement
| Factor | LP SmartSide | James Hardie Fiber Cement |
|---|---|---|
| Core material | Wood strand board with resin treatment | Cement, sand, and cellulose fiber — non-combustible |
| Finish | Pre-primed; field-painted, needs periodic recoating | Factory-applied ColorPlus finish, baked on, warrantied against fading/peeling |
| Moisture behavior | Resin-treated but still wood-based; depends on intact paint/caulk | Doesn't swell, rot, or absorb moisture the way wood fiber does |
| Installation tolerance | Low — unsealed field cuts and joints are common failure points | More forgiving; still requires correct flashing and clearances |
| Insect/rot vulnerability | Treated, but a wood-based product | Not a food source for insects or fungus |
| Fire performance | Wood-based product with treatment | Non-combustible material |
| Warranty structure | Manufacturer warranty, often prorated over time | Long-term, transferable, non-prorated in most product lines |
| Material cost | Generally lower | Generally higher, offset by lower lifetime maintenance |
Why We Standardized on James Hardie Instead
We made a decision, as a company, to install one siding system and stand fully behind it: James Hardie fiber cement. It's not a marketing preference — it's a response to exactly the climate conditions Whatcom County throws at a house. Fiber cement doesn't rely on an intact paint film to keep water out of the substrate itself, since the substrate isn't wood fiber to begin with. Hardie's ColorPlus factory finish is baked on under controlled conditions and warrantied against fading, chipping, and peeling — which matters directly in a region where UV exposure is inconsistent but moss, algae, and driving rain are constant.
Climate-Engineered Product Lines
Hardie also builds region-specific HZ5 product formulations engineered for climates with more moisture exposure and freeze-thaw variability — the kind of engineering decision that reflects the same climate reality we're describing here, rather than a one-size-fits-all national spec.
Warranty That Actually Transfers
Hardie's warranty structure is non-prorated over a long term and transfers to a new owner if the home sells — a meaningful detail for Lynden homeowners who may not be in the home for the full life of the siding but still want the investment to hold its value at resale.
What to Ask Any Contractor Before You Decide
Whatever siding you're considering, these are fair questions to ask, and any honest contractor should be able to answer them clearly:
- What happens at every field cut — is it sealed on-site, and how?
- What's the manufacturer's recommended maintenance schedule for this specific product in a wet climate?
- Is the warranty prorated, and does it transfer if I sell the house?
- What's the material actually made of, and how does it behave when it stays wet for days at a time?
- Will the finish need field-applied paint, and on what cycle?
If a contractor can't answer those without hedging, that's worth noting before you sign anything.
Our Bottom Line
LP SmartSide isn't a product we'd call a bad choice everywhere — it's a product we've decided isn't the right fit for what Whatcom County weather does to a house year after year. Between the salt air, the sustained rain, and a moss season that tests every seam and joint on a home's exterior, we'd rather install a material that doesn't ask a homeowner to maintain a perfect paint film indefinitely just to keep water out of the wall. That's why every siding job we take on goes up in James Hardie fiber cement, and why we're upfront about it before you ever get a quote.
If you're weighing siding options for a home in Lynden or anywhere in Whatcom County, we're happy to walk your property, point out what your specific exposure looks like, and give you a straight, no-pressure estimate for what a Hardie installation would involve.