Mount Vernon Built for Downtown Mount Vernon's Climate
Downtown Mount Vernon sits in the Skagit River valley, close enough to Puget Sound that homes here deal with a steady mix of salt-tinged marine air, driving rain off the water, and long stretches of gray, damp weather that can run from October well into spring. That combination is hard on exterior building materials in ways that homeowners further inland rarely have to think about. Add in the shade from mature trees and tight lot spacing common in older downtown neighborhoods, and you get conditions that keep siding wet longer after every storm, which is exactly the recipe moss and algae need to take hold.
We work on homes throughout Mount Vernon and the rest of Skagit County, and downtown is one of the areas where we see the clearest evidence of what happens when siding isn't matched to this climate. Wood-based products swell, peel, and rot at seams and butt joints. Vinyl gets brittle and stained, and it never really sheds that green cast once moss gets a foothold. It's a pattern we've seen often enough that it shaped how we do business.
Why We Only Install James Hardie Fiber Cement
Our company installs one siding system: James Hardie fiber cement. We don't install vinyl, LP SmartSide, Cemplank, Allura, primed spruce, or cedar. That's not a marketing angle — it's a decision based on what actually holds up in a place like Mount Vernon, where siding stays wet more of the year than it stays dry.
Fiber cement is made from cement, sand, and cellulose fibers. It doesn't absorb moisture the way wood-based products do, so it doesn't swell, delaminate, or rot the way engineered wood siding can when water gets behind it or sits in a seam. It's also non-combustible, which matters given how many homes in this region back up to trees, greenbelts, or wooded lots. Hardie's ColorPlus factory finish is baked on and cured before the boards ever reach the jobsite, which gives it better resistance to fading and peeling than field-applied paint, and it means touch-up and repainting isn't something you should need to plan for every few years.
Hardie also builds region-specific product lines (their "HZ" system) engineered for different climate zones. The version installed in Western Washington is built for exactly the kind of sustained moisture and moderate temperatures Skagit County gets, rather than a one-size-fits-all board.
What Correct Installation Looks Like Here
Fiber cement performs the way it's supposed to only when it's installed to spec — and in a wet climate, the installation details matter as much as the product itself. That means:
- Proper rainscreen or drainage plane behind the siding so moisture that gets past the surface has somewhere to go
- Correct flashing at windows, doors, and roof lines — the places where downtown Mount Vernon homes most often show water intrusion
- Manufacturer-specified fastening and clearances, including gaps at grade and around trim, so boards aren't sitting in standing water or snow load
- Factory-cut and factory-primed edges wherever possible, since exposed cut edges are the one spot fiber cement needs extra attention
Skipping any of these steps is how you end up with the exact problems fiber cement is supposed to prevent. It's also why we don't treat siding as a standalone job — the same crew doing your siding can look at your roofing, windows, and decking at the same time, since water problems in this climate rarely respect the line between one trade and another. A gap in window flashing or a roof edge that isn't shedding water properly can undermine even a well-installed wall of siding.
Why a Local Crew Matters
A crew that works Skagit County year-round knows which walls of a downtown Mount Vernon home take the worst weather, how much shade and moss exposure to expect on north- and west-facing sides, and how the valley's humidity behaves differently than it does out toward the coast or up in the foothills. That local knowledge shapes small decisions — flashing details, drainage planning, where to be extra careful with seams — that a crew unfamiliar with this specific climate might not think twice about.
It also means we're around after the job is done. James Hardie backs its products with a strong transferable warranty, and we stand behind our installation work as well, which matters more in a climate that tests exterior materials as hard as this one does.
Also Serving Your Roofing, Window, and Deck Needs
Siding is only one piece of how a home holds up against Skagit County weather. We also handle roofing, window replacement, and deck construction, and we look at all four together when we're on a property — a failing roof edge or an aging window can undo the benefit of new siding if it's left unaddressed.
Get a Free Estimate
If you're seeing moss, staining, or soft spots on your Mount Vernon home's exterior, we're happy to take a look and walk you through what we'd recommend and why. Reach out for a free, no-pressure estimate — there's no obligation, and no pressure to sign anything on the spot.