Semiahmoo Siding Cedar siding has a real fan base, and it's easy to see why. Fresh-cut cedar has a warmth and natural grain that manufactured products spend a lot of marketing money trying to imitate. If a homeowner in Semiahmoo asks us about cedar, we don't pretend it's a bad-looking material — it isn't. What we tell them instead is why we, as a company, stopped installing it, and why that decision has everything to do with where their house actually sits.
What cedar does well
Cedar is a real wood with genuine natural resistance to decay and insects compared to most softwoods, thanks to oils in the wood itself. It takes stain beautifully, it's lightweight and workable, and a well-maintained cedar home has a texture and character that's hard to fake. None of that is in dispute. The problem isn't the day cedar goes up — it's every year after that.
Why we don't install it here
Semiahmoo sits right on the water, and that changes the math on wood siding in a few specific ways:
- Salt air accelerates finish breakdown. Salt-laden marine air is harder on exterior stains and sealers than inland air. A finish schedule that might stretch to four or five years elsewhere often needs attention closer to every two to three years here, or the wood starts absorbing moisture unevenly.
- Driving rain finds every gap. Whatcom County storms don't just fall straight down — wind-driven rain gets pushed sideways into lap joints, butt seams, and end grain. Cedar's natural rot resistance is real, but it's not unlimited, and end grain in particular will take on water faster than the face of the board.
- Long moss season means constant biological growth. Our wet, mild, shaded conditions for much of the year are close to ideal for moss and algae. On cedar, that growth doesn't just sit on the surface — it holds moisture against the wood and can accelerate the very decay the wood's natural oils are supposed to resist. Keeping cedar clean enough to avoid this is an ongoing job, not a one-time treatment.
Put together, those three conditions mean cedar siding installed near Semiahmoo needs a maintenance rhythm that's noticeably tighter than what the same product would need in a drier, more inland climate. That's not a defect in the wood — it's just what this specific coastline does to any organic material left exposed to it year-round.
The maintenance conversation homeowners don't always get upfront
Cedar siding is often sold on its up-front look and its "it's just wood, it'll last" reputation. What tends to get left out is the ongoing cost: periodic re-staining or sealing, regular washing to knock back moss and mildew, caulking maintenance at joints and trim, and eventually replacing individual boards that have taken on rot despite everyone's best efforts. None of that is unusual for wood siding anywhere — it's just more frequent in a marine, high-moss climate than most people expect when they're standing in a showroom looking at a sample board.
We'd rather have that conversation before installation than have a homeowner discover it two winters in.
Why we install James Hardie instead
James Hardie fiber cement is engineered specifically to remove the variables that make wood siding a maintenance commitment in a place like this:
| Concern in our climate | How Hardie addresses it |
|---|---|
| Moisture absorption and rot | Fiber cement doesn't rot the way wood does, and Hardie's HZ5 product line is engineered for the specific moisture and freeze-thaw demands of climates like ours |
| Finish breakdown from salt air and sun | ColorPlus factory-applied finish is baked on under controlled conditions, not brushed on site, and is backed by its own finish warranty |
| Moss and algae growth | The fiber cement substrate doesn't feed biological growth the way organic wood fiber can, which simplifies routine washing |
| Fire exposure | Fiber cement is non-combustible, which matters to us as an installer regardless of climate |
| Long-term ownership | Backed by a strong transferable warranty when installed to Hardie's spec |
We're not going to tell a homeowner that fiber cement looks identical to real wood grain in every lighting condition — a trained eye can usually tell the difference up close. What we will say is that Hardie's lap, shingle, and panel profiles get close enough for most people, and the trade-off is a siding system that isn't fighting the salt air, the rain, and the moss season every single year to stay intact.
Our standard, and why it's just one product
We made the decision to install James Hardie exclusively rather than offering cedar, vinyl, or engineered wood alternatives, because we'd rather be excellent at installing one product to spec than adequate at installing several. Correct installation — proper flashing, fastening, clearances, and joint treatment — matters as much as the material itself, and we can hold ourselves to a tighter standard when we're not spreading that expertise across four different siding systems with four different sets of rules.
If you're weighing cedar against fiber cement for a home in Semiahmoo or elsewhere in Whatcom County, we're glad to walk through what each option actually means for your specific house — roof overhangs, sun exposure, proximity to the water, and how much upkeep you actually want to take on. Reach out for a free, no-pressure estimate and we'll give you a straight answer.