Birch Bay Siding An Honest Look at Engineered Wood Siding
LP SmartSide comes up in almost every siding conversation we have with homeowners in Birch Bay, and we understand why. It's a real engineering improvement over the old hardboard products that gave wood-based siding a bad name in the 1990s. The strand-based substrate, resin saturation, and zinc borate treatment for insect and fungal resistance are legitimate advances. We're not here to tell you it's a bad product. We're here to tell you why we, as a company that installs siding on homes in Whatcom County's marine climate, chose not to carry it.
What SmartSide Gets Right
SmartSide is a wood-based product, but it's engineered wood, not solid lumber or plain OSB. The strands are oriented and bonded under heat and pressure with a resin system designed to resist moisture absorption better than untreated wood. It comes factory primed, it's lighter than fiber cement, and it's easier to cut and fasten without the dust-control requirements that come with cement-based products. For a lot of markets, it performs well for a long time when installed and maintained correctly. That last phrase is the whole issue.
Where It Runs Into Trouble Near the Water
Birch Bay sits right on the water, and that changes the math on any wood-based product. Salt air accelerates corrosion on fasteners and trim, driving rain off the Strait comes in sideways during winter storms, and the moss season here runs long compared to drier parts of the state. Any siding installed in this environment needs to shed water aggressively and dry out quickly when it does get wet. Wood-based products, even engineered ones, are still fundamentally cellulose fiber. When water finds its way past a compromised seam, a nail hole that wasn't sealed, or a cut edge that was left unprimed at the job site, the material can swell, and swelling at panel edges or butt joints doesn't reverse itself.
This isn't a defect in the product so much as a maintenance requirement built into its design. SmartSide relies on field-applied caulking at every seam, joint, and penetration, and that caulking has a service life. In a climate with this much sustained moisture exposure, caulk joints need more frequent inspection and recaulking than they would in a dry inland region. Skip a cycle, and water gets a path in exactly where the substrate is least able to handle it.
The Maintenance Schedule Homeowners Actually Face
Manufacturer warranties on engineered wood siding are typically conditioned on following a documented maintenance schedule: recaulking joints on a set interval, repainting the factory-primed surface within a defined window after installation and then repainting again on a recurring cycle, and keeping cut edges sealed any time trim work or repairs expose raw material. In a coastal Whatcom County environment with heavy annual rainfall and a moss season that keeps surfaces damp for extended stretches, that maintenance schedule tends to compress. Homeowners end up repainting and recaulking more often than the warranty language implies, and if that upkeep lapses, the warranty coverage can lapse with it.
We install siding we expect to still look good and perform well fifteen and twenty years out, without asking a homeowner to keep a painting and caulking calendar just to keep the product's protection intact. That's the core of why we don't carry SmartSide.
Why We Standardized on James Hardie Instead
James Hardie fiber cement is made from cement, sand, and cellulose fiber, cured into a dense, non-combustible board that doesn't share wood's moisture-swelling behavior at cut edges and seams. It arrives with a factory-applied ColorPlus finish baked on under controlled conditions, which means no field painting is required at installation and the color holds up under UV and salt air exposure far longer than a field-applied coat would. Hardie also makes climate-specific HZ product lines engineered for exactly the kind of wet, coastal exposure Birch Bay deals with every winter.
None of this means fiber cement is maintenance-free forever, but the maintenance burden is smaller and the material itself doesn't rely on an intact paint or caulk film to keep water out of its core. For a home a few blocks from Semiahmoo Bay or Birch Bay's own shoreline, that difference matters more than it would fifty miles inland.
The Comparison, Side by Side
| Factor | LP SmartSide | James Hardie Fiber Cement |
|---|---|---|
| Core material | Engineered strand wood + resin | Cement, sand, cellulose fiber |
| Combustibility | Combustible | Non-combustible |
| Finish | Factory primed, field-painted | Factory-cured ColorPlus finish |
| Moisture behavior | Can swell at compromised seams/edges | Dimensionally stable, doesn't swell like wood |
| Coastal maintenance demand | Regular recaulking/repainting cycle | Lower ongoing upkeep |
Talk to Us Before You Decide
If you're comparing siding options for a home in Birch Bay, we're glad to walk through what we've seen hold up in this specific climate and why. This isn't about talking anyone out of a product that has its place — it's about being honest regarding what performs well on the water versus a few miles inland. Reach out for a free, no-pressure estimate and we'll take a look at your home's exposure, existing siding condition, and what makes sense for the long run.