Blaine Siding Two Different Materials, One Big Decision
If you're researching siding options for a home in Blaine, you've probably run into both James Hardie fiber cement and LP SmartSide in your search. Both are established, widely used products with real manufacturer backing. They are not the same material, though, and the differences matter more here on the Whatcom County coastline than they would in a drier, milder inland climate. Salt air off the Strait of Georgia, long stretches of driving rain, and a moss season that can run most of the year all put steady pressure on whatever is covering your walls.
What LP SmartSide Actually Is
LP SmartSide is an engineered wood product — strand-based substrate treated for resistance to fungal decay and termites, then primed at the factory. It's a legitimate product line, and LP has spent years improving the treatment process. It cuts and installs easily, it's lighter than fiber cement, and the upfront material cost is usually lower. For homeowners on a tighter budget, that's a genuine consideration and we don't pretend otherwise.
The catch is that it's still a wood-based product at its core. Wood and sustained moisture are natural enemies, and LP's own installation instructions are specific about it: every cut end, notch, and drilled hole has to be field-sealed with primer or sealant before installation, and exposed edges need ongoing caulk maintenance for the life of the siding. Skip a step during install, or let caulking fail a few years down the road, and moisture finds its way into the substrate. In a climate like Blaine's — where driving rain comes in sideways off the water and things stay damp for long stretches — that maintenance schedule isn't optional. It's the difference between the product performing as designed and it not.
What James Hardie Is Built From
James Hardie siding is fiber cement — a mix of cement, sand, and cellulose fibers, cured into a rigid board. There's no organic wood substrate for moisture to attack, no cut-end sealing requirement to maintain year after year, and no wood grain for moss and algae to take hold in the way they do on organic siding surfaces. Given how long moss season runs on this side of the state, that's not a small detail.
Hardie also builds region-specific product lines. The HZ5 formulation is engineered for climates that see freeze-thaw cycling and sustained moisture exposure — which describes a Whatcom County winter well. On top of the substrate, Hardie's ColorPlus finish is baked on in a factory-controlled environment, which gives it better resistance to fading and to the corrosive effect of salt-laden air than field-applied paint typically achieves. It's also non-combustible, which matters more each year as wildfire smoke and dry spells become part of the regional picture even out here on the coast.
Side-by-Side
| Factor | LP SmartSide | James Hardie |
|---|---|---|
| Core material | Engineered/treated wood strand | Fiber cement |
| Moisture behavior | Requires ongoing edge sealing and caulk maintenance | No organic substrate to swell or decay |
| Finish | Factory-primed, field-painted | Factory-baked ColorPlus or field-painted |
| Fire rating | Combustible | Non-combustible |
| Moss/algae susceptibility | Organic surface can support growth if damp persists | Inorganic surface resists organic growth |
| Warranty | Manufacturer warranty, prorated | Manufacturer warranty, transferable to one subsequent owner |
Why We Standardized on One Product
We install James Hardie exclusively — not LP SmartSide, not vinyl, not other fiber cement brands. That's not a marketing angle; it's a decision we made after weighing how each product actually performs over a decade or two on homes in this exact climate, not just on a spec sheet. LP SmartSide can be installed correctly and can perform reasonably well when every sealing step is followed and maintenance stays current. But we'd rather stand behind one system we know inside and out, sourced from one manufacturer with a track record we trust, than split our crews' expertise across multiple products with different installation requirements and different long-term risk profiles.
For a marine environment like Blaine's — salt air, sustained rain, and moss pressure nearly year-round — a rigid, inorganic, factory-finished material gives us fewer variables to manage and gives homeowners fewer maintenance obligations to stay on top of. That's the trade-off we made, and it's why Hardie is the only siding we put on homes.
Get an Honest Read on Your Home
Every house is different, and the right siding decision depends on your home's exposure, current condition, and budget — not just a materials comparison. If you'd like a straightforward, no-pressure look at what your home in Blaine actually needs, we're happy to walk the property with you and put together a free estimate.