Siding in Custer: Built for Whatcom County's Coastal Edge
Custer sits close enough to the water and open farmland that homes here take a different kind of beating than siding fifty miles inland. Salt-laden air off the Strait, wind-driven rain that comes in sideways during the winter storm season, and a moss season that seems to stretch longer every year all put steady pressure on exterior surfaces. If you've owned a home in this part of Whatcom County for more than a few winters, you've probably already seen what that combination does to paint, trim, and lower-grade siding materials.

What Custer's Climate Actually Does to a House
It's worth being specific about the mechanisms at work, because "wet climate" undersells it:
- Salt air acceleration: Airborne salt from the coast doesn't just corrode metal fasteners and flashing faster than inland environments — it also holds moisture against exterior surfaces longer, which keeps siding damp between rain events instead of letting it dry out.
- Driving rain: Wind out of the south and southwest pushes rain horizontally against walls, not just down onto roofs. That means the vertical faces of a house — siding, trim, window and door surrounds — take on water load that a drier climate's siding was never designed to handle.
- Extended moss and algae season: Shade, moisture, and mild temperatures mean moss and algae can establish on north-facing walls and anywhere siding stays damp, sometimes holding on nearly year-round rather than dying back in a dry summer.
Over years, this combination is what causes paint failure, swelling, soft spots, and the slow cosmetic decline you see on a lot of older homes in this area — regardless of what siding material was originally installed.
Why We Only Install James Hardie Fiber Cement
We made a deliberate decision to install James Hardie fiber cement siding exclusively — not vinyl, not LP SmartSide, not cedar, not primed spruce. In a climate like Custer's, that decision comes down to how each material actually behaves over time, not just how it looks on installation day.
Fiber cement is non-combustible and dimensionally stable, meaning it doesn't expand and contract with moisture the way wood-based products can, and it doesn't soften or delaminate the way some engineered wood siding can when it stays wet for extended periods. James Hardie's ColorPlus factory-applied finish is baked on under controlled conditions, which gives it better resistance to fading and moisture intrusion at the surface than field-applied paint — a real advantage in an area where paint failure from constant moisture cycling is a recurring problem.
Hardie also engineers specific product lines (HZ5 and HZ10) for different climate zones, accounting for freeze-thaw cycling and moisture exposure. That matters here. We're not choosing Hardie because it's trendy — we're choosing it because we've seen what holds up against salt air and driving rain, and what doesn't, and we don't want our name on a job that's going to need attention again in five years.
Roofing, Windows, and Decks: The Same Climate Logic Applies
Siding rarely fails in isolation. A lot of the moisture problems we see in Custer trace back to a roofing detail that let water behind the wall assembly, a window that wasn't properly flashed, or a deck ledger board that's been trapping moisture against the house for years. Because we handle roofing, windows, and decks in addition to siding, we can look at a home's whole exterior envelope rather than patching one component and leaving the underlying moisture path unresolved. That matters more here than in drier parts of the state, where a minor flashing gap might go unnoticed for a decade instead of causing visible damage within a couple of wet seasons.
What a Local Crew Brings to a Custer Job
A crew that works this specific stretch of Whatcom County knows things a general contractor from outside the area might not think to check: how far back from the water a home sits, which exposures take the worst of the driving rain, where moss tends to establish first, and how local permitting and inspection processes actually run. That local knowledge shows up in details — fastener spacing, flashing choices, ventilation behind the cladding — that don't show up on a spec sheet but make a real difference in how the siding performs ten and twenty years out.
What to Expect From a Siding Project Here
| Step | What It Involves |
|---|---|
| Assessment | Walk the home, check current siding condition, look for moisture damage behind existing cladding, evaluate roof and window flashing |
| Product Selection | Recommend the appropriate James Hardie line and profile based on exposure, style, and color goals |
| Prep and Moisture Barrier | Address any water intrusion issues found during assessment before new siding goes on |
| Installation | Install to Hardie's specifications, including correct fastening, clearances, and flashing details for our climate |
| Final Walkthrough | Review the finished work and confirm everything meets both Hardie's installation requirements and our own standard |
If your Custer home is showing signs of paint failure, soft spots, persistent moss, or you're just planning ahead for a siding, roofing, window, or deck project, we're happy to take a look and talk through honest options. Reach out for a free, no-pressure estimate — no obligation, just a straight assessment of what your home actually needs.
Ferndale Siding