Lynden Exterior Vinyl Siding Looks Like an Easy Answer — It Usually Isn't
Vinyl siding shows up on a lot of Whatcom County homes because it's cheap to buy and fast to install. We understand the appeal. But we don't install it, and we think Lynden homeowners deserve a straight explanation of why, rather than a sales pitch for whatever happens to be in our truck.
Vinyl isn't a bad material in the abstract. In a dry, mild climate it can hold up reasonably well for a while. The problem is that Lynden isn't that climate. Between marine air rolling in off the Salish Sea, long stretches of driving rain through the fall and winter, and a moss season that can run half the year on shaded north- and west-facing walls, vinyl gets tested in ways it wasn't really built for.
What Vinyl Gets Right
To be fair to the product: vinyl is lightweight, inexpensive up front, and doesn't rot or rust the way untreated wood does. It's a reasonable choice in a lot of markets, and plenty of manufacturers make a decent version of it. This isn't a case of the material being junk — it's a case of the material being a poor match for this specific climate and for the standard we hold ourselves to.
Where Vinyl Struggles in a Whatcom County Climate
It Moves With the Weather
Vinyl expands and contracts with temperature swings more than fiber cement does. Installers have to leave room for that movement — nail it too tight and panels buckle or warp; leave too much slack and wind gets underneath. Whatcom County's mix of cold snaps, damp mornings, and gusty coastal wind puts that installation tolerance to the test year after year, and even a correctly installed job can start to show waviness over time.
Wind and Driving Rain
Vinyl panels are hung, not fully fastened flat, which means wind-driven rain can work its way behind them, especially at corners, seams, and trim. In a climate where storms regularly blow in horizontally off the water, that's not a hypothetical — it's a routine stress test. Once moisture gets behind the panel, it can sit against the sheathing and framing without much of a way to dry out.
Moss, Mildew, and the Long Wet Season
The same shaded, damp conditions that make Lynden's landscaping thrive are hard on siding. Vinyl's surface texture and the small gaps at panel laps give moss, algae, and mildew places to take hold, particularly on north-facing walls and under eaves. Homeowners end up power-washing or scrubbing every year or two just to keep it looking presentable — and aggressive cleaning can crack or discolor aging vinyl.
Color and Brittleness Over Time
Vinyl's color is baked into the plastic, but UV exposure and years of temperature cycling still cause it to fade and become more brittle. Older vinyl can crack from a stray baseball, a ladder bump, or just cold-weather flexing — and matching faded panels for a repair gets harder every year as color runs change.
How That Plays Out on a Real Home
| Concern | Vinyl Siding |
|---|---|
| Wind-driven rain resistance | Relies on lapped panels; water can track behind at seams and corners |
| Moss and algae on shaded walls | Textured surface and lap gaps trap moisture and debris |
| Dimensional stability | Expands/contracts noticeably with temperature swings |
| Impact resistance | Becomes brittle with UV and age; cracks rather than dents |
| Fire performance | Combustible plastic material |
Why We Standardized on James Hardie Fiber Cement
We install only James Hardie fiber cement siding, and the reasons come directly from the trade-offs above. Fiber cement is dimensionally stable — it doesn't expand and contract the way vinyl does, so seams and fastening stay tighter over decades rather than years. It's non-combustible, which matters to us and to insurers. And Hardie's HZ5 product line is engineered specifically for climates with heavy moisture exposure, which describes Whatcom County well.
The ColorPlus factory finish is baked on under controlled conditions and backed by a real finish warranty, so you're not stuck power-washing moss out of a textured plastic surface every spring or watching color fade unevenly panel by panel. Fiber cement also holds a crisper, flatter profile against the wall, which sheds wind-driven rain more predictably than a lapped, floating vinyl panel system.
None of this means vinyl is a scam or that everyone who has it made a mistake. It means that after years of watching how different siding materials actually perform on homes in this specific stretch of coastal Washington, we decided we'd rather install one product correctly and stand behind it than offer several and hope the cheaper one holds up.
Thinking About Your Siding Options?
If you're weighing vinyl against fiber cement for a home in Lynden or elsewhere in Whatcom County, we're happy to walk your specific house — sun exposure, wind exposure, shaded walls, all of it — and give you an honest read on what will actually hold up. Reach out for a free, no-pressure estimate and we'll tell you what we'd do if it were our own home.