Ferndale Siding Built for Custer's Coastal Conditions
Custer sits in the stretch of Whatcom County between Ferndale and Blaine, close enough to the Strait of Georgia and Birch Bay that homes here deal with a different exterior workload than houses further inland. Salt-laden air off the water, long stretches of driving rain through fall and winter, and a moss season that can run most of the year all add up. Siding, trim, and roofing in this area don't just get wet — they stay wet, and they take on airborne salt that accelerates corrosion on fasteners, flashing, and lower-quality cladding.
We're a local crew that works this part of the county regularly, and Custer's climate is a big part of why we made the call years ago to install only James Hardie fiber cement siding. It's not the only siding product on the market, but it's the one we're willing to stand behind here.
What the Climate Actually Does to a House in Custer
A few things show up again and again on homes in this area:
- Moisture that doesn't quit. Whatcom County's rain isn't just volume — it's duration. Siding that traps moisture behind it, or that swells and softens when saturated, doesn't get the drying window it would in a drier climate.
- Salt air corrosion. Proximity to the water means metal fasteners, flashing, and trim hardware are exposed to salt that speeds up rust and pitting if the wrong materials are used or installation details are skipped.
- Persistent moss and algae growth. Shaded north- and west-facing walls, especially under trees, stay damp long enough for moss and mildew to take hold on porous or wood-based siding.
- UV and freeze-thaw cycling. Even in a mild coastal climate, repeated wet-dry and cold-warm swings stress caulk joints, paint film, and any siding material that expands and contracts significantly with moisture.
None of this is unique to any one street or subdivision in Custer — it's a function of being this close to the Strait, and it applies to most homes in the broader Ferndale and Blaine corridor.
Why We Install James Hardie Fiber Cement Here
James Hardie fiber cement is engineered around exactly these pressures. It's non-combustible, doesn't rot or absorb water the way wood-based products can, and resists the swelling and softening that shows up on inferior siding after years of Pacific Northwest weather. Hardie's ColorPlus factory finish is baked on under controlled conditions, which gives it better resistance to fading and moisture intrusion at the surface than a field-applied paint job, and it holds up well against the persistent damp that feeds moss and mildew growth.
Hardie also makes climate-specific HZ product lines engineered for different exposure zones, which matters in a region where wind-driven rain and humidity are a bigger factor than in drier parts of the state. Backed by a strong transferable warranty and a track record of holding up when installed correctly, it's the product we're comfortable putting our name behind on a Custer home.
We don't install LP SmartSide, vinyl siding, Cemplank, Allura, primed spruce, or cedar. Each of those has situations where it can perform reasonably well, but we've made a standard for our company and we stick to it: one product, installed correctly, every time. That consistency lets us get genuinely good at the install details — flashing, gapping, fastener placement, caulking — that determine whether siding actually performs in a climate like this one.
Roofing, Windows, and Decks in the Same Conditions
Siding isn't the only exterior system fighting Custer's climate. Roofs here deal with the same driving rain and moss pressure, and small flashing or ventilation mistakes show up as leaks or premature wear faster in this environment than in drier regions. Windows need tight, well-flashed installation to keep wind-driven rain out of the wall assembly — a poorly sealed window is one of the more common sources of hidden water damage we find on coastal Whatcom County homes. Decks exposed to this much moisture need materials and fastening details that account for near-constant dampness and the moss growth that comes with it.
We handle all four — siding, roofing, windows, and decks — as one crew, which means the flashing and water-management details between systems actually get coordinated instead of handed off between separate contractors who never talk to each other.
Why a Local Crew Matters in Custer
A lot of exterior problems in this area come down to installation details, not just material choice. Knowing how much lap to give flashing, where ventilation gaps need to be, and how much clearance siding needs from grade and hardscaping isn't generic knowledge — it's shaped by working this specific stretch of coastline year after year. A crew that's used to building for Seattle's drier suburbs or for a different climate zone entirely doesn't always carry that judgment with them.
Working in and around Ferndale and Custer regularly also means we're not guessing at how a house will hold up five or ten years out — we see the results of past work in this area and adjust accordingly.
Get a Straightforward Estimate
If you're weighing a siding, roofing, window, or deck project on a home in Custer, we're happy to take a look and give you an honest read on what your house needs and what it doesn't. Reach out for a free, no-pressure estimate using the form below.