Lynden Siding Siding in Kendall Has to Answer to the Weather, Not Just the Budget
Kendall sits back from the coast in the foothills of Whatcom County, where tree cover is heavier, lots stay shaded longer into the day, and moisture from the Nooksack River bottomlands lingers on exterior walls. Add in the driving rain that rolls off the Cascade foothills for much of the year and the long, damp shoulder seasons that never fully dry out, and you get a climate that is genuinely hard on exterior materials. Homes here don't fail because owners neglected them — they fail because the siding wasn't built for this kind of sustained exposure in the first place.
We install James Hardie fiber cement siding exclusively, and Kendall is a good example of why. This page is specifically about Hardie siding for Kendall homes: what the climate demands, what a correct installation actually involves, and how our process works when we're on your property.
What Kendall's Climate Actually Does to a House
It helps to separate the specific stresses this area puts on siding, because "wet climate" undersells it:
- Extended dampness: shaded, tree-lined lots and river-adjacent moisture mean siding surfaces can stay damp for days after a storm, not hours.
- Driving rain: wind-driven rain doesn't just wet the surface of a wall — it tests every seam, joint, and fastener penetration for water intrusion.
- Long moss and mildew season: the combination of shade and moisture gives moss, algae, and mildew a long runway to establish on any surface that holds water or organic debris.
- Coastal-influenced humidity: like much of Whatcom County, the broader air moisture profile here — carried in from the Sound and Strait — keeps humidity elevated even between rain events, which matters for anything that swells, rots, or absorbs water.
None of this is unusual for the region. It's exactly why siding choice matters more here than in a dry climate, where a mediocre installation might go a decade without showing a problem.
Why We Only Install James Hardie
James Hardie fiber cement is engineered specifically for climates like this. It's non-combustible, dimensionally stable, and doesn't absorb and release moisture the way wood-based products do. Hardie also builds region-specific formulations — the HZ5 product line is engineered for climates with freeze-thaw cycling and sustained moisture exposure, which fits Whatcom County far better than a one-size-fits-all product.
The factory-applied ColorPlus finish is a real part of that engineering, not just a convenience. Because the color and protective coating are baked on in a controlled factory environment rather than field-painted, the finish resists the fading, peeling, and mildew staining that field-applied paint struggles with in a wet, shaded climate. That matters directly in Kendall, where north-facing and tree-shaded walls are the first to show streaking and moss growth on lesser materials.
We won't install LP SmartSide, vinyl, cemplank, primed spruce, or cedar on a Kendall home, and we're upfront about why:
- Vinyl expands and contracts significantly with temperature swings, can warp under sustained moisture and UV cycling, and doesn't offer the fire resistance Hardie does.
- Wood-based composite siding (LP SmartSide) relies on edge sealing and field maintenance to keep moisture out; in a climate where walls stay damp for days at a stretch, any lapse in that maintenance shows up as swelling or delamination.
- Cedar and primed spruce are beautiful but need real upkeep — repainting, caulking, and moisture monitoring — to survive this level of sustained exposure, and moss/mildew take hold on wood grain faster than on a factory-finished fiber cement surface.
These aren't bad products in every climate. They're just not what we're willing to put our name behind here, given what this specific weather does to a wall over 10, 20, and 30 years.
What a Correct Hardie Installation Involves
Hardie siding's long-term performance depends almost entirely on installation quality — the product itself is only half the equation. A rushed or undertrained crew can install genuine Hardie board and still create a house that leaks, stains, or fails early. For a Kendall home, we pay particular attention to:
Water management behind the siding
Every Hardie installation needs a correctly lapped weather-resistive barrier, properly flashed window and door openings, and a drainage plane that lets any moisture that does get behind the siding find its way back out. In a climate with this much sustained rain, a compromised water-resistive barrier is the single most common cause of hidden rot behind siding that looks fine from the curb.
Fastening and clearances
Hardie specifies exact fastener spacing, penetration depth, and clearances from grade, roof lines, and decks. Panels installed too tight to a horizontal surface, or fastened incorrectly, trap moisture at exactly the joints most exposed to driving rain.
Joint and butt seam treatment
Butt joints need to be properly caulked or flashed per Hardie's specifications — not just butted together and painted over. This is one of the most commonly skipped steps on rushed jobs, and it's exactly the failure point that shows up as staining and moisture intrusion a few years later.
Starter strips and bottom clearance
The first course of siding needs a proper starter strip and clearance from grade, decking, and roof surfaces. Skipping this is a shortcut that saves an installer maybe twenty minutes and costs a homeowner a rotted band board a few years down the line.
Our Process on a Kendall Property
| Step | What Happens |
|---|---|
| Assessment | We walk the exterior, check existing siding and sheathing condition, and note shaded/moisture-prone walls that need extra attention to drainage and flashing. |
| Prep and tear-off | Removal of existing siding, inspection of sheathing for hidden rot or moisture damage, and repair of any compromised framing before new material goes on. |
| Weather barrier and flashing | Correct lapping of the water-resistive barrier and flashing at every window, door, and penetration — the step that determines whether the wall stays dry for decades. |
| Hardie installation | Panels and/or lap siding installed to Hardie's fastening, clearance, and joint specifications, maintaining manufacturer warranty compliance. |
| Trim, caulking, and cleanup | Finish trim work, sealant at penetrations, and full site cleanup, including old material disposal. |
| Final walkthrough | We review the completed work with you before considering the job done. |
What It Costs — and What Drives the Range
Every Kendall home is different, and we won't quote a number without seeing the property, but these are the real factors that move a siding project's cost up or down:
| Factor | Why It Matters |
|---|---|
| Existing sheathing condition | Hidden rot or moisture damage found during tear-off requires repair before new siding goes on — this is the most common source of cost changes mid-project. |
| Home size and wall complexity | More corners, dormers, and roof lines mean more flashing detail and labor time. |
| Siding profile chosen | Lap siding, panel systems, and shingle-style Hardie products carry different material and labor costs. |
| Trim and accent work | Hardie trim boards, soffit work, and accent details add scope beyond the field siding itself. |
| Access and site conditions | Tree cover, slope, and equipment access on rural Kendall lots can affect labor time. |
Maintenance: What Actually Keeps Hardie Siding Performing
Hardie siding is low-maintenance, not no-maintenance. In a climate with this much moss and mildew pressure, a few habits go a long way:
- Rinse siding annually (garden hose pressure is enough — avoid aggressive pressure washing that can force water behind joints).
- Keep gutters clear so overflow doesn't run down and pool against siding at corners.
- Trim back vegetation and tree limbs that keep walls shaded and damp longer than necessary.
- Watch for moss or algae buildup at north-facing and shaded walls and clean it before it spreads.
- Re-caulk penetrations (hose bibs, vents, fixture mounts) if you notice cracking or gaps.
- Have caulking and joints inspected every few years, especially after severe wind-driven storms.
Why a Crew That Already Works Kendall Matters
Kendall isn't downtown Lynden — it's a more rural, tree-covered part of Whatcom County, and the practical realities of working here are a little different: longer driveways, septic and well locations to work around, more tree cover to manage during tear-off, and homes that were often built or added onto in stages over the years. A crew that already understands these patterns doesn't waste time relearning them on your job. We've installed Hardie siding throughout the Lynden area, and we bring that same standard — full manufacturer specification, no shortcuts on flashing or fastening — to every Kendall property we work on.
If you're weighing a siding replacement or new construction siding in Kendall, we're happy to walk the property, look at what your home is actually dealing with, and give you a straight answer about scope and cost. Reach out for a free, no-pressure estimate using the form below.