Semiahmoo Siding Cedar Has a Real Appeal — We're Not Going to Pretend Otherwise
Cedar siding shows up on a lot of Pacific Northwest homes for good reason. It's a natural material with genuine warmth, it takes stain in rich tones that fiber cement and vinyl can't fully replicate, and it has a long regional history — cedar shake and clapboard have been part of this coastline's building tradition for generations. Homeowners in Semiahmoo who love that look aren't wrong to love it. The wood grain, the way it weathers, the smell of it during installation — cedar has character that manufactured products are still trying to imitate.
That said, we're a fiber cement contractor. We install James Hardie exclusively, and we don't install cedar siding on the homes we work on. This page explains why, honestly and without exaggeration, so you can make your own decision with the full picture in front of you rather than just the showroom version.
What Cedar Actually Requires, Year After Year
Cedar siding is not a "install it and forget it" product. It's a maintenance commitment, and the commitment is ongoing, not one-time. Left unfinished, cedar will gray and weather unevenly. Finished with stain or paint, it needs recoating on a cycle — typically every 3 to 7 years depending on exposure, finish quality, and how much direct weather the wall takes. A south- or west-facing wall exposed to driving rain off the water will need attention far sooner than a sheltered wall.
That recoating isn't cosmetic touch-up. It's pressure washing or hand-cleaning, inspecting for split or cupped boards, replacing any that have degraded, caulking joints that have opened up, and then applying a fresh coat of stain or paint correctly — which means the right weather window, the right prep, and often scaffolding or ladder work on a two-story home. Skip a cycle or two and the wood starts absorbing moisture faster than it did when new, which accelerates the very problems the finish was supposed to prevent.
The Maintenance Cycle in Practice
- Annual visual inspection for cracking, cupping, or finish failure, especially on weather-facing walls
- Recoating every 3-7 years with stain, or repainting on a similar or longer cycle
- Caulk and sealant renewal at joints, corners, and trim intersections
- Prompt replacement of any board showing rot, insect damage, or persistent moisture staining
- Gutter and drainage maintenance kept current, since cedar is far less forgiving of water intrusion than manufactured siding
Why Semiahmoo's Climate Makes This Harder, Not Easier
Semiahmoo sits right on the water at the edge of Whatcom County, which means homes here deal with a combination cedar doesn't love: salt-laden air, driving rain off Semiahmoo Bay and the Strait of Georgia, and a long moss season that runs most of the wet months. Salt air accelerates finish breakdown on painted and stained wood surfaces. Driving rain pushes moisture into joints, seams, and end grain — the most vulnerable points on any wood siding installation. And moss doesn't just sit on the surface; it holds moisture against the wood, which is exactly the condition that leads to rot underneath a finish that still looks fine from the ground.
None of this means cedar "fails" in this climate. Plenty of cedar-sided homes in Whatcom County are maintained well and hold up for decades. But it means the maintenance window is tighter here than it would be in a drier inland climate, and the cost of falling behind is higher. A missed recoating cycle in a dry climate might mean a slightly faded finish. A missed cycle here, on a wall that takes direct rain, can mean moisture working its way behind boards before anyone notices.
Installation Sensitivity Most Homeowners Never See
Cedar siding is far more installation-sensitive than most homeowners realize, and a lot of the long-term problems we see on wood-sided homes trace back to installation shortcuts rather than the wood itself. Back-priming — coating the back and edges of every board before installation, not just the face — is essential for cedar in a wet climate, and it's also the step most commonly skipped because it adds labor and material cost that doesn't show up in the finished look.
Board spacing, fastener placement, flashing details at every window and door, and proper rain-screen or drainage gap behind the siding all matter more with wood than with engineered products, because wood moves with moisture more than fiber cement does, and it has less inherent resistance to decay if water does get behind it. A correctly installed cedar exterior can perform well for a long time. An incorrectly installed one can show problems within a few years, even with diligent finish maintenance, because the water intrusion is happening at the install layer, not the surface.
Cost Over Time: Cedar vs. Fiber Cement
The sticker price comparison between cedar and fiber cement doesn't tell the full story. What matters to most homeowners is the cost over the life of the siding, including labor for upkeep, not just the install invoice.
| Factor | Cedar Siding | James Hardie Fiber Cement |
|---|---|---|
| Initial material cost | Moderate to high | Moderate |
| Finish maintenance | Recoat every 3-7 years | ColorPlus factory finish; no recoating on the manufacturer's schedule |
| Moisture vulnerability | Higher; end grain and joints are sensitive points | Engineered to resist moisture and won't rot |
| Fire performance | Combustible | Non-combustible fiber cement |
| Insect/rot exposure | Susceptible without diligent upkeep | Not a food source for insects; resists rot |
| Typical warranty | Varies by installer; often limited or none on the material itself | Manufacturer-backed, transferable warranty on the product |
| Long-term labor cost | Recurring, cumulative over decades | Low; mainly periodic cleaning |
The Warranty Gap Is a Bigger Deal Than It Sounds
Cedar siding warranties, when they exist at all, tend to be thin. A supplier might warrant the lumber grade at the time of sale, but once it's installed, weathering, finish failure, and moisture damage are typically on the homeowner and whatever the installing contractor is willing to stand behind. There's no manufacturer standing behind the long-term performance of the wood itself the way there is with an engineered product.
James Hardie backs its fiber cement siding with a manufacturer warranty that's transferable if you sell the home, which matters both for your own protection and for resale. When a buyer's inspector asks about the siding warranty, "the manufacturer backs it" is a very different answer than "it depends on how well it's been maintained."
What We Install Instead, and Why
We standardized on James Hardie fiber cement siding because it's engineered specifically for the trade-offs that matter most in a coastal Pacific Northwest climate like Semiahmoo's. It's non-combustible, it doesn't rot or feed insects, and Hardie's HZ5 product line is engineered for exactly the wet, moderate-freeze climate zone this region sits in. The ColorPlus factory finish is baked on under controlled conditions rather than applied on-site, which means far more consistent, longer-lasting color performance than field-applied stain or paint on wood — without the recoating cycle cedar requires.
We're not installing Hardie because it's trendy. We're installing it because after years of doing exterior work in this climate, it's the product that lets us tell a homeowner "this will look right and perform well for decades with minimal upkeep" and actually mean it, backed by a manufacturer warranty rather than good intentions.
If You Already Have Cedar Siding
If your Semiahmoo home currently has cedar and it's being maintained on schedule, there's no reason to panic or replace it early. But it's worth knowing the warning signs that mean maintenance has fallen behind and moisture is starting to win:
- Finish that's peeling, cracking, or has gone matte and chalky rather than just faded
- Boards that are cupping, splitting, or feel soft when pressed at the bottom edge
- Persistent moss or algae growth that doesn't clear with normal cleaning
- Dark staining or streaking at seams, corners, or below window sills
- Caulk joints that have shrunk, cracked, or pulled away from trim
- A noticeable jump in how often the exterior needs cleaning or attention compared to a few years ago
Any of these are worth a professional look before they become bigger problems, whether that means a maintenance plan to extend the cedar's life or a conversation about replacement.
Making the Decision for Your Own Home
This isn't a case of one product being "good" and another being "bad." Cedar can be a legitimate choice for a homeowner who values the look, is committed to the recoating schedule, and understands the risk profile in a wet coastal climate. Our position is simply that we've chosen not to be the contractor for that path, because we'd rather install a product we can stand behind for decades than one that depends on a maintenance schedule staying perfectly on track in a climate that doesn't make that easy.
If you're weighing cedar against fiber cement for a home in Semiahmoo or elsewhere in Whatcom County, we're happy to talk through both honestly, including where cedar might still make sense for your situation. If you'd like a straightforward, no-pressure look at what James Hardie siding would cost and look like on your home, we're glad to come out and give you a free estimate.