Lynden Exterior Exterior Work in Custer
Custer sits in the northwest corner of Whatcom County, close enough to the water that salt air is a real factor in how exteriors age, and far enough into farm country that wide-open exposure to wind and driving rain is just part of life. Homes and outbuildings here take a different kind of beating than a house tucked into a sheltered subdivision closer to town. If you own property in or around Custer, you've probably already noticed it: paint that fails early, trim that stays damp longer than it should, roofs that green up with moss faster than the calendar says they should.
What the Climate Does to Homes Here
Three things drive most of the exterior problems we see in this part of Whatcom County.
- Salt-laden air: Proximity to the Strait of Georgia and Birch Bay means airborne salt gets carried inland on the wind. Over years, that accelerates corrosion on fasteners, flashing, and any exterior material that isn't built to shrug off moisture and chemical exposure.
- Driving rain: This stretch of the county gets weather that comes in sideways, not just straight down. Wind-driven rain finds every gap in siding laps, window flashing, and roof penetrations that a calmer climate would never expose.
- A long moss season: Cool, damp conditions for much of the year mean moss and algae get a long runway to establish themselves on roofs and north-facing siding. Once moss gets a foothold, it holds moisture against the surface underneath it, which is exactly the condition that causes rot and premature material failure.
None of this means Custer is a bad place to own a home — it just means the exterior envelope has to be built and installed with those conditions in mind, not against a generic national spec.
Siding: Why We Only Install James Hardie
We install James Hardie fiber cement siding exclusively. We don't install vinyl, LP SmartSide, cedar, primed spruce, or other fiber cement brands like Allura or Cemplank. That's not a marketing line — it's a decision based on what actually holds up under salt air, moss, and driving rain year after year.
Vinyl siding can warp and fade under UV and temperature swings, and its seams give wind-driven rain more opportunities to work moisture behind the panel. Wood-based products like cedar or primed spruce look great on day one, but they need ongoing maintenance to resist rot in a climate that stays damp for months at a time — skip a paint cycle or two and the damage compounds fast. Engineered wood siding depends heavily on sealed edges and consistent maintenance to keep moisture out; in a region with this much sustained dampness, that margin for error gets thin.
James Hardie fiber cement is non-combustible, dimensionally stable, and doesn't feed mold or rot the way wood-based products can. Hardie's HZ5 product line is engineered specifically for climates with heavy moisture exposure, which describes Custer well. The factory-applied ColorPlus finish resists fading and holds up to the coastal air better than field-applied paint, and it comes backed by a strong transferable warranty. When it's installed to Hardie's spec — correct clearances, proper flashing, fastener patterns that account for wind exposure — it's the material we trust to actually perform here, not just look good in the first season.
Roofing
A roof in Custer needs to manage two things well: shedding wind-driven rain and resisting moss. That means attention to underlayment, proper flashing at every penetration and valley, and ventilation that keeps the deck from staying damp longer than necessary. We look at moss growth as a symptom, not just a cosmetic issue — it usually points to a spot where the roof is holding moisture it shouldn't be.
Windows
Window failures in this area are almost always a flashing and sealing problem before they're a product problem. Wind-driven rain will find a poorly flashed window opening and push water behind the siding and into the wall assembly. When we replace windows, the install detail around the opening matters as much as the window itself.
Decks
Outdoor living spaces in Custer deal with the same moisture load as the rest of the exterior. Ledger attachment, proper flashing where the deck meets the house, and materials chosen for sustained dampness all matter more here than they would in a drier climate.
Why a Local Crew Matters
A crew that works across Whatcom County regularly, including the more exposed, rural stretches around Custer, knows what wind-driven rain and salt air actually do to an exterior over time. That's different from working off a generic installation manual written for a milder climate. We bring that local judgment to every siding, roofing, window, and deck project we take on here.
Get a Free Estimate
If you're dealing with moss buildup, failing siding, or just want an honest read on your home's exterior, we're happy to take a look. Reach out for a free, no-pressure estimate using the form below.