Ferndale Siding Exterior Work Built for Custer's Climate
Custer sits in the northwest corner of Whatcom County, close enough to the water that salt-laden air is a regular part of the weather mix, and close enough to the Cascades' rain shadow gap that storms roll through with real force. Homes out here take a different kind of beating than houses twenty miles inland. Between the salt exposure, the driving rain off Georgia Strait and Birch Bay, and a moss season that can stretch from October well into spring, exterior surfaces here age faster than most manufacturers' marketing accounts for.
Ferndale Siding Company works this stretch of Whatcom County regularly, and Custer's exterior challenges are ones we see and plan for, not ones we're guessing at on the fly.
What Custer Homes Are Up Against
A few conditions show up again and again on homes in this area:
- Salt air corrosion: Proximity to the water means airborne salt settles on siding, trim, and fasteners. Over time it accelerates the breakdown of materials that aren't built to resist it, and it can corrode lower-grade metal fasteners and flashing.
- Driving rain: Storms here don't just fall straight down, wind pushes rain sideways into wall assemblies. Any siding product that isn't dimensionally stable or that relies on paint film alone for weather resistance is going to show it at the seams and butt joints first.
- Moss and organic growth: Persistent moisture and shaded north-facing walls (common on lots with mature evergreens, which much of Custer has) create ideal conditions for moss, algae, and mildew to take hold on roofs and siding alike.
- Temperature swings and moisture cycling: Wet winters followed by drier summers put wood-based and composite products through repeated swelling and shrinking, which is where seams open up and paint starts to crack.
Why We Standardized on James Hardie Fiber Cement
We install James Hardie siding exclusively, and Custer is a good example of why. Hardie's fiber cement is engineered specifically for Pacific Northwest conditions through its HZ5 product line, which is formulated for the moisture and temperature patterns common in this climate zone. It's non-combustible, it doesn't absorb water the way wood or wood-composite products do, and it holds its factory-applied ColorPlus finish far longer than field-applied paint on other siding types typically lasts in a salt-air, high-rain environment.
We don't install LP SmartSide, vinyl, Cemplank, Allura, primed spruce, or cedar. Each of those products has legitimate uses and each has real trade-offs when the site conditions are like Custer's: vinyl can warp and fade under UV and doesn't hold up structurally under wind-driven rain intrusion the same way a rigid fiber cement board does; primed wood and cedar require a maintenance commitment (painting, caulking, moisture monitoring) that most homeowners underestimate until moss and rot show up behind the boards; other fiber cement brands may perform reasonably but don't offer the same track record, factory finish process, or transferable warranty structure that we've come to trust enough to put our name behind. We'd rather install fewer products well than a wider range with mixed results five years down the road.
What That Means for a Custer Project
| Concern | How Hardie Addresses It |
|---|---|
| Salt air exposure | Fiber cement doesn't corrode or pit; we pair it with corrosion-resistant fastening appropriate for coastal-influenced sites |
| Driving rain | Engineered water-management detailing at laps, joints, and penetrations, installed to Hardie's spec |
| Moss and mildew | Factory-cured ColorPlus finish resists moisture absorption better than field-painted surfaces, reducing the substrate for organic growth to take hold |
| Freeze-thaw and moisture cycling | Dimensionally stable board that won't swell, cup, or crack the way wood-based products can |
Beyond Siding: Roofing, Windows, and Decks
Siding rarely fails in isolation out here. A roof that's shedding moss instead of shedding water, window flashing that's let salt-laden moisture behind the trim, or a deck that's been soaking up rain all winter all put stress on the same wall assembly your siding is trying to protect. We handle roofing, window, and deck work alongside siding so we can look at a Custer home's full exterior envelope at once, rather than patching one component and leaving the others to fail on their own timeline. That's especially relevant on older Whatcom County homes where the siding, roofing, and trim were never designed to work together as a system in the first place.
Why a Local Crew Matters Here
A crew that mostly works drier, inland climates will detail a wall differently than a crew that installs in Custer week in and week out. Flashing details, fastener choices, and ventilation planning all need to account for what this specific stretch of coastline and rain pattern actually does to a house over a decade or two, not just what a general spec sheet says. We're a Ferndale-based crew working Whatcom County's coastal communities regularly, which means the moss patterns, the salt exposure, and the storm direction here aren't unfamiliar variables to us, they're what we plan around on every job.
Get a Free Estimate
If you're noticing moss buildup, worn siding, or drafts around your windows on your Custer home, we're happy to take a look. Reach out for a free, no-pressure estimate using the form below, and we'll walk the property with you and talk through what your home actually needs.