Lynden Siding Aldergrove's Weather Is Hard on Roofs
Aldergrove sits close enough to the Salish Sea and the Fraser Valley lowlands that its roofs deal with a specific combination of punishment: salt-laden air moving in off the water, long stretches of driving rain, and a moss season that barely lets up between October and May. None of that is unusual for this stretch of the border region, but it adds up faster than most homeowners expect. A roof that would show only light wear after ten years in a dry inland climate can show real deterioration here in half that time if it isn't maintained and repaired properly.
Storm damage doesn't always announce itself with a hole in the roof. More often it shows up as a handful of shingles pulled loose in a windstorm, a section of flashing that worked itself open during a hard rain, or granule loss that's been quietly accelerating because moss has been holding moisture against the shingle mat. By the time a homeowner notices a stain on a ceiling, the damage underneath has usually been building for a while.
What Counts as Storm Damage
"Storm damage" covers more than the aftermath of one dramatic windstorm. On roofs in this area, we typically see damage that falls into a few categories:
- Wind-lifted or torn-off shingles, especially along ridges, edges, and any section facing the prevailing wind
- Granule loss from wind-driven rain, which leaves the asphalt mat exposed to UV and moisture
- Flashing that's been bent, lifted, or pulled away from chimneys, skylights, and roof-to-wall joints
- Punctures or dents from wind-blown branches and debris
- Water intrusion at valleys and low-slope sections where wind-driven rain finds the smallest gap
- Moss-related deterioration that a storm exposes rather than causes — the moss loosened the shingles, and the storm finished the job
That last category matters more here than in drier parts of the state. Moss doesn't just sit on top of a roof looking untidy. Its root structure lifts shingle edges and holds water against the roofing material, which weakens the seal and the shingle itself well before any storm arrives. A lot of what looks like "storm damage" is really moss damage that a windstorm exposed.
How We Handle a Storm Damage Repair Call
The First Visit
We start with a full roof inspection, not just a look at the spot the homeowner is worried about. Wind and rain rarely damage only one area — if shingles lifted on one slope, it's worth checking the ridge, the flashing, and the opposite slope too, since the same storm likely stressed the whole roof. We check the attic or roof deck from underneath where access allows, since interior staining and deck softness tell us things the surface alone won't.
If the roof has active leaks or exposed decking, we address that first — a tarp or temporary seal to stop water intrusion while we plan the permanent repair. Storm damage doesn't wait for a convenient repair schedule, and a few days of exposed decking during a wet stretch can turn a shingle repair into a decking replacement.
The Permanent Repair
Once the roof is stable, we do the actual repair: replacing damaged shingles with matching material where we can source it, resealing or replacing flashing, correcting any underlayment that got wet, and checking that valleys and penetrations are properly sealed. We don't patch over a problem we can see is going to recur — if the underlying cause is a flashing detail that was never installed correctly, we fix that detail, not just the symptom.
We also clean up after ourselves. Storm repair work generates debris — old shingles, nails, cut flashing — and we don't leave that scattered across the yard or gutters.
Common Repairs We Make on Roofs in This Area
Asphalt Shingle Roofs
Most homes here have asphalt shingle roofs, and most of our storm calls involve them. Wind uplift at the edges and ridge is the most common failure point, followed by granule loss on slopes that catch the worst of the driving rain. Repairs usually mean replacing individual shingles or a full course, resealing tabs, and checking that the ridge cap is intact.
Metal Roofing
Metal roofs handle wind well but are more sensitive to fastener and seam failures. A storm can work fasteners loose or open a seam just enough to let water in, and the fix is usually straightforward once we find the exact spot — which on a metal roof isn't always obvious from the ground.
Flashing, Valleys, and Low-Slope Sections
These are the parts of a roof most likely to leak after a storm, and they're also the parts most likely to be installed with shortcuts on a home that's had prior work done by someone unfamiliar with the local climate. Valleys and low-slope sections need flashing details built for sustained rain, not just occasional showers — and that's exactly the kind of detail that gets skipped by crews who don't normally work in a marine climate like this one.
Repair or Replace? What Actually Decides It
Not every storm-damaged roof needs a repair — and not every roof with a repairable problem should be repaired. The honest answer depends on the roof's age, how widespread the damage is, and what condition the rest of the roofing system is in.
| Factor | Leans toward repair | Leans toward replacement |
|---|---|---|
| Roof age | Under 10-12 years | Nearing or past its expected service life |
| Extent of damage | Isolated to one area or slope | Spread across multiple slopes or the whole roof |
| Underlying moss/moisture history | Minor, recently addressed | Long-term, with visible deck softness |
| Shingle match availability | Matching shingles still obtainable | Discontinued or badly weathered surrounding shingles |
| Number of prior repairs | First or second repair on this roof | Roof has a history of repeated patch jobs |
We'll tell you plainly which side of that line your roof falls on. A repair that's going to need another repair in two years isn't a favor to anyone — it just delays a decision and adds cost along the way.
Insurance and Storm Claims
Wind and storm damage is often covered under homeowners insurance, but coverage details vary by policy and by how the damage is documented. We photograph and describe the damage as we find it, which gives homeowners something concrete to work with when filing a claim. We're not an insurance adjuster and we won't tell you what your policy covers — that's between you and your insurer — but we can make sure the documentation on the roofing side is thorough and accurate.
- Take photos of visible damage from the ground before any repair work begins, if it's safe to do so
- Note the date of the storm event, since claims are often tied to a specific weather date
- Keep any repair estimate or invoice — insurers generally want an itemized description, not just a total
- Ask your insurer whether they require an inspection before repairs start, so temporary tarping doesn't complicate the claim
Moss, Salt Air, and Keeping the Next Storm From Doing the Same Damage
A repair that ignores why the roof was vulnerable in the first place is only a temporary fix. In this part of Whatcom County, that usually means dealing with moss and staying ahead of the moisture it holds against the roof surface.
- Keep gutters clear so water isn't backing up under the shingle edges during heavy rain
- Trim back overhanging branches that shade the roof and keep moss growth going year-round
- Have moss physically removed rather than just treated, since dead moss still holds moisture
- Check flashing and sealant at penetrations annually — these are the first places a marine climate finds a way in
- Address small granule loss or lifted shingles promptly, before the next windstorm turns a small problem into a bigger one
Why a Crew That Already Works This Border Area Matters
Aldergrove sits right up against the Whatcom County line, and a lot of roofing crews simply don't work this stretch regularly — it's a bit of an in-between area for contractors based further from the border. That gap shows up in the quality of past repairs we're sometimes called out to fix: flashing details that would hold up fine in a drier climate but weren't built for the amount of driving rain and moss pressure this area actually gets.
Working this border region regularly means we're not guessing at what the climate does to a roof here — we're seeing it on every call. That familiarity shapes how we flash a valley, what we check first on an inspection, and how seriously we take moss that might look cosmetic to an out-of-area crew but that we know is already undermining the shingles beneath it.
Getting an Estimate
If a recent windstorm left your roof looking rough, or you're just not sure whether what you're seeing is cosmetic or something that needs attention now, we're happy to take a look. We'll give you a straight answer about what's actually wrong, what it'll take to fix it, and whether repair or replacement makes more sense for your roof. Reach out for a free, no-pressure estimate using the form below.