Lynden Exterior Custer's Weather Is Harder on Siding Than Most Homeowners Realize
Custer sits out toward the water side of Whatcom County, closer to Puget Sound and the Strait of Georgia than most of Lynden proper. That location matters more than it looks like on a map. Homes here catch more salt-laden air off the water, more sustained wind-driven rain rolling in off the coast, and a longer, damper moss season than properties further inland. Siding that would hold up fine in a drier part of the county can start showing problems years earlier out here.
Salt air is corrosive to fasteners and hard on paint films. Driving rain doesn't just wet the surface of siding — it gets pushed sideways and upward under laps, trim, and butt joints if those details weren't built or repaired correctly the first time. And moss doesn't just look bad; it holds moisture against the siding surface for weeks at a stretch, which is exactly the condition that accelerates rot, paint failure, and delamination in lower-quality siding products.
None of this means Custer homes need constant repair. It means repairs need to be done to a higher standard than a quick patch, because the climate here doesn't give a bad repair much time to fail.
Signs a Custer Home Needs Siding Repair
Most siding problems we get called out for in this area fall into a few recognizable patterns. If you're seeing any of these, it's worth having it looked at before the next wet season:
- Soft, spongy, or visibly swollen siding, especially near the bottom courses, around windows, or at outside corners
- Paint that's bubbling, peeling, or chalking heavily in specific areas rather than evenly across the whole house
- Persistent moss or dark streaking in the same spots year after year, even after cleaning
- Gaps opening up at butt joints, trim, or corner boards where caulking has failed
- Visible cracking or chipping, particularly at impact points near grade, decks, or walkways
- Staining on interior walls or ceilings near exterior walls, which often points to a siding or flashing failure rather than a roof leak
The common thread is water getting somewhere it shouldn't and staying there. In a climate with as much driving rain and moss as Custer sees, small gaps and failed joints don't stay small for long.
What a Correct Siding Repair Actually Involves
A siding repair that actually solves the problem is more than swapping out a damaged board. Done right, it includes:
Finding the real cause, not just the symptom
If a section of siding is soft or stained, we want to know why water got in before we close it back up — a missing kick-out flashing, a caulked joint that should have been left to drain, a butt joint with no proper overlap, or trim that's trapping moisture against the wall. Replacing the board without fixing the cause just buys you a few more years before the same spot fails again.
Checking what's behind the siding
Once a section is open, we look at the water-resistive barrier, sheathing, and framing underneath. Sometimes the siding is the only casualty. Sometimes there's sheathing damage that needs to be addressed before new siding goes back on — that's a conversation we have with you before proceeding, not after.
Matching material and finish
Patchwork that doesn't match in profile, reveal, or color sticks out and often performs worse than the original because of how it ties into existing flashing and joints. We match products and, where possible, factory finish so the repair blends in and functions the way the original installation was designed to.
Correct flashing and joint details
This is where a lot of repairs succeed or fail. Every seam, corner, and penetration needs a path for water to get out, not just a bead of caulk to keep water from getting in. Caulk is a backup, not a strategy.
Repair vs. Replacement: How We Decide
Not every problem area means the whole house needs new siding, and not every homeowner who calls about "a repair" actually has a repair-sized problem. We tell you honestly which situation you're in.
| Situation | Usually a Repair | Usually Points to Replacement |
|---|---|---|
| Damage location | Isolated to one wall, corner, or a handful of boards | Spread across multiple elevations |
| Underlying sheathing | Sound, dry, structurally fine | Soft, delaminated, or rotted in more than one area |
| Cause | A single identifiable failure point (flashing, joint, impact damage) | Systemic issue — original product or install method failing broadly |
| Siding age and condition elsewhere | Rest of the siding is sound and not near end of service life | Rest of the siding is old, chalking, or was a lower-durability product to begin with |
| Product on the house | Existing material can be matched or is still performing | Existing material is a product we'd recommend against reinstalling (see below) |
If we open a section and find the damage is more extensive than expected, or that it's really a symptom of a house-wide siding or moisture-management problem, we'll tell you that plainly rather than keep patching a house that needs a real fix.
Why We Repair — and Replace — with James Hardie Fiber Cement Only
Lynden Exterior Co. installs one siding system: James Hardie fiber cement. That applies to repairs the same as full replacements. We don't patch a Hardie wall with vinyl or a composite product, and if a home currently has vinyl, LP SmartSide, or another fiber cement brand and needs more than a minor patch, we'll talk with you honestly about what that product can and can't do long-term in this climate rather than just matching what's already there.
Vinyl siding can crack in cold snaps, warp under heat and reflected sunlight, and gives water an easy path behind it once a seam or fastener fails — and it can't be feathered or blended the way fiber cement can, so repairs are more visibly a repair. LP SmartSide and similar engineered wood products perform well when installed and maintained exactly to spec, but they're wood-based, meaning any moisture intrusion — the exact risk Custer's rain and moss create — has more consequences than it does with a cement-based product. Other fiber cement brands aren't necessarily bad products, but we've standardized on Hardie because of how consistently it performs in this specific climate, the strength of its factory ColorPlus finish, and the clarity of its warranty coverage.
James Hardie fiber cement is non-combustible, dimensionally stable in wet-dry cycling, and available in HZ5 formulations engineered for cold, wet regions like ours. When we repair a section of Hardie siding, we're working with a material we know inside and out, backed by a manufacturer warranty that's actually transferable to a future owner — which matters if you're thinking about resale down the road.
How Our Process Works for a Custer Repair Call
- Initial look and conversation. We come out, look at the affected area and the rest of the exterior, and ask what you've noticed — when it started, whether it tracks with a particular storm or season.
- Opening it up. If needed, we remove the affected section to see what's underneath before quoting anything. Guessing at scope from the outside leads to bad estimates.
- Honest scope and pricing. You get a clear explanation of what we found, what caused it, and what it'll take to fix — repair, or a recommendation to consider a larger project if that's genuinely what the house needs.
- The repair itself. Correct flashing and drainage details first, then matched Hardie material, then finish work so the repair reads as part of the house, not a patch.
- Walkthrough. We show you what was done and what to keep an eye on going forward.
Why Local Experience in Custer Specifically Matters
A contractor who mostly works drier, more sheltered parts of Whatcom County can still do fine work — but they may not be tuned to how much more aggressive Custer's exposure is compared to a mile or two inland. We work this area regularly enough to know which elevations tend to take the worst of the driving rain, where moss builds up fastest, and which original construction details tend to fail first in this specific microclimate. That shows up in how we flash a repair and where we tell you to keep an eye going forward, not just in the work itself.
After the Repair: Keeping Custer Siding in Good Shape
- Rinse moss and algae off siding surfaces at least once a year, more often on shaded or north-facing walls
- Keep gutters clear so overflow isn't running down the siding face
- Trim back vegetation and landscaping so walls get airflow and sun exposure to dry out between rains
- Walk the exterior after major storms and check caulked joints, trim, and corners for new gaps
- Address small paint or caulk failures early — they're cheap to fix now and expensive to ignore for a few winters
Get an Honest Look Before It Gets Worse
If you're seeing soft spots, staining, persistent moss, or failing joints on a Custer home, it's worth having someone look before another wet season passes. We'll give you a straight answer on whether it's a repair or something bigger, with no pressure either way. Use the form below to request a free estimate.