Bellingham Siding Homeowners ask us about vinyl siding often, and it's a fair question — it's inexpensive, widely available, and most siding crews in Whatcom County can install it. But we're a Hardie-only contractor, and we think you deserve a straight answer about why, rather than a sales pitch dressed up as "education." So here it is.
What vinyl siding does well
Vinyl has real strengths. It's the lowest up-front cost of any common siding material, it never needs painting, and on a mild, dry lot it can hold up for years with minimal attention. If budget is the single deciding factor on a project, vinyl is not an unreasonable choice in general terms. We're not going to tell you it's a bad product — we're going to tell you why it's not the product we choose to put our name behind.
Where vinyl runs into trouble in this climate
Bellingham sits on Bellingham Bay, which means a lot of the siding in this area deals with salt-laden air on top of the Pacific Northwest's normal wet-season workload. Add in the driving rain that comes off the Sound during fall and winter storms, and a long, damp moss season that keeps north-facing walls shaded and moist for months at a time, and you've got a climate that tests every seam, joint, and fastener on a house.
Vinyl siding is a plastic product, and plastic behaves differently in temperature swings than fiber cement or wood. Panels are installed with slotted nail holes specifically so they can expand and contract — which means the material is, by design, never fully rigid on the wall. In a stretch of cold, clear nights followed by damp, mild days (a pattern Whatcom County sees regularly), that constant movement can work fasteners loose over time, and panels installed even slightly too tight can buckle or bow.
Vinyl also isn't a water barrier itself — it's designed to shed the bulk of the rain while relying on the water-resistive barrier and flashing behind it to manage whatever gets past the panel. In a low-driving-rain climate that's a manageable system. In a high-driving-rain climate like ours, where wind-driven rain regularly hits walls at an angle, the quality of what's happening behind the vinyl matters more than the vinyl itself — and that's a much harder thing for a homeowner to verify once the siding is up.
A few other honest trade-offs worth knowing about:
- Impact and cold brittleness: Vinyl gets more brittle in cold weather and can crack from impact — a dropped ladder, a wind-thrown branch, a stray baseball — in a way that's more noticeable in winter.
- Heat distortion: Reflected sunlight off certain energy-efficient windows or nearby surfaces can warp vinyl siding in isolated spots, an issue that shows up unpredictably depending on a home's layout.
- Color fade and UV exposure: Vinyl color runs through the panel, but UV exposure and salt air over years will dull and chalk the surface unevenly, especially on south- and west-facing walls.
- Moss and mildew grip: The textured, slightly porous surface of vinyl gives moss and mildew something to hold onto in our long wet season, and cleaning it requires care since pressure-washing can force water behind panels or crack aged material.
Why we standardized on James Hardie instead
We made a decision as a company to install one product system — James Hardie fiber cement — and to do it correctly rather than offer a menu of materials with varying trade-offs. A few reasons that decision holds up specifically for this region:
- Dimensional stability: Fiber cement doesn't expand and contract with temperature the way vinyl does, so it holds its fastening and its lines through our freeze-thaw and wet-dry cycles.
- Built for this climate: Hardie's HZ5 product line is engineered specifically for climates with significant moisture exposure, which describes Whatcom County well.
- Factory-applied ColorPlus finish: Instead of color running through a plastic panel, Hardie's ColorPlus finish is baked on in a controlled factory process, which holds up better against UV and salt air fading than field-painted or color-through materials.
- Non-combustible: Fiber cement doesn't burn, which matters more every wildfire season even here on the wet side of the state.
- Resists moss and pests: It doesn't give insects a food source, and it holds up to the pressure-washing and cleaning that moss removal requires in this climate.
- Transferable warranty: Hardie backs the product with a strong warranty that can transfer to a new owner, which matters for resale in a market like ours.
None of this means vinyl is a bad product in the abstract — it means we looked at what our specific climate does to a house over twenty or thirty years and decided we'd rather install one material well than several materials with compromises we'd have to explain later. Fiber cement costs more up front than vinyl, and installing it correctly takes more skill and time. We think that trade-off is worth it here.
Talk it through with us
If you're weighing siding options for a home in Bellingham or anywhere in Whatcom County, we're happy to walk your specific house — sun exposure, wind direction, moss history, and all — and give you a straight read on what it needs. Reach out for a free, no-pressure estimate and we'll tell you what we'd actually do if it were our own house.