Birch Bay Siding Exterior Work Built for Custer's Coastal Climate
Custer sits inland from Birch Bay in Whatcom County, close enough to the Salish Sea that homes here deal with the same weather pattern that shapes exteriors all along this stretch of coastline: damp winters, salt-tinged air rolling off the water, and long stretches of the year when siding, trim, and roofing rarely get a chance to fully dry out. Add in the tree cover and rural lots common around Custer, and you get one more factor working against exterior surfaces — shade that keeps moisture sitting on north-facing walls and rooflines well after a storm has passed.
What We See on Custer Exteriors
Every coastal Whatcom County property is a little different, but the patterns repeat often enough that we plan around them:
- Salt air exposure — even set back from Birch Bay itself, airborne salt travels with the wind and accelerates corrosion on fasteners, flashing, and any exterior material that isn't built to resist it.
- Driving rain — Pacific storms don't just fall straight down here; wind-driven rain gets pushed sideways into siding seams, window trim, and butt joints, which is where poor installation shows up first as staining or soft spots.
- A long moss season — shaded rooflines, gutters, and lower siding courses stay damp for months, giving moss and algae plenty of time to take hold if surfaces and materials aren't set up to shed water and dry quickly.
- Rural and tree-covered lots — many Custer properties have mature trees close to the house, which means more debris in gutters, more shade on walls, and slower drying after rain.
None of this makes Custer unusual — it's the same coastal Whatcom County climate that shapes exterior decisions from Birch Bay down through Blaine and beyond. But it does mean the materials and installation details matter more here than they would in a drier inland climate.
Why We Only Install James Hardie Siding
We install James Hardie fiber cement siding exclusively. We don't offer vinyl, LP SmartSide, Cemplank, Allura, primed spruce, or cedar, and that's a deliberate standard, not a limitation on what we're capable of installing.
In a climate like Custer's, the materials that struggle are usually the ones that depend on a perfect, unbroken paint or coating layer to keep moisture out. Wood products can perform well when properly maintained, but they demand a repainting and caulking schedule that's easy to fall behind on, and once moisture gets past the surface, rot can set in quietly behind the siding. Engineered wood products carry their own moisture-sensitivity requirements around installation and ongoing maintenance. Vinyl sheds water fine on its face but relies on lap joints and can become brittle over time in sun and cold, and it doesn't offer the same fire resistance as fiber cement.
James Hardie fiber cement is non-combustible, holds its factory-applied ColorPlus finish far longer than field-applied paint typically lasts, and is engineered in HZ5 and HZ10 formulations specifically for high-moisture, freeze-thaw climates like ours. It doesn't feed moss and algae the way wood-based products can, and it resists the swelling, cracking, and rot that salt air and constant damp encourage in less resilient materials. Backed by a strong transferable warranty, it's the product we're willing to put our name behind on Custer homes.
Full Exterior Protection, Not Just Siding
Siding is only one piece of how a Custer home holds up against wind-driven rain and salt air. We also handle:
- Roofing — the first line of defense against driving rain and the surface most exposed to moss growth under tree cover.
- Windows — proper flashing and sealing at window openings is one of the most common failure points we find on older coastal homes.
- Decks — outdoor living spaces exposed to the same rain and salt air, built or repaired with materials suited to the climate.
Treating these as one connected exterior system, rather than separate projects, is how water intrusion actually gets prevented — a well-installed siding job can still fail if the roof or window flashing above it isn't doing its job.
Why a Local Crew Matters
Custer and the surrounding Birch Bay area have specific weather habits — the timing of the wet season, which directions the driving rain tends to come from, how much shade a given lot gets and for how long. A crew that works this part of Whatcom County regularly recognizes those patterns and installs accordingly: correct flashing details at penetrations, attention to drainage planes, and siding installed to the manufacturer's specifications rather than shortcuts that might pass in a milder climate. That local familiarity, paired with a single material standard we trust, is what keeps a Custer exterior performing for decades instead of years.
If you're planning a siding, roofing, window, or deck project in Custer, we're happy to take a look and talk through what your home actually needs. Reach out for a free, no-pressure estimate using the form below.