Blown-Off Shingles After a Skagit Windstorm

Updated August 2026 · Alpine Exteriors · WA contractor license ALPINI751OW

When a strong system moves through the Skagit flats or funnels down the Strait of Juan de Fuca toward Whidbey and Camano Island, asphalt shingles are usually the first thing on a house to show it. A gust doesn't need to be dramatic to lift a shingle tab that's already lost some of its seal — and once one goes, the ones around it are more exposed to the next blow. If you've found shingles in the yard, in the gutter, or missing from a slope you can see from the driveway in Mount Vernon, Burlington, Anacortes, or Sedro-Woolley, here's how to size up what actually happened and what to do about it.

Symptoms and identification

Some wind damage is obvious — a shingle sitting in the flower bed, a bare rectangle of felt paper showing on the roof deck. Other damage is easy to miss from the ground and only shows up once water starts finding its way in. Things worth checking after any windstorm:

• Shingles that are visibly missing, or ones that are creased, torn, or folded back on themselves
• Tabs that lift when you look at the roofline from an angle in low sun — the shadow line gives it away even when the shingle is still attached
• A sudden increase in granules collecting in gutters or at downspout outlets (some granule loss is normal over time; a fresh pile after one storm is not)
• Exposed black underlayment or bare wood decking in a patch on the roof
• Nail heads popped up through the shingle surface, sometimes with a small ring of exposed metal
• Ridge cap shingles that look loose or crooked along the peak
• Fresh water stains on an interior ceiling or in the attic, especially near a wall or valley, showing up a day or two after the storm rather than during it

That last one matters because leaks from wind-lifted shingles don't always announce themselves right away. Water can travel sideways along the underlayment or a rafter before it drips somewhere visible, so a dry-looking ceiling the day after a storm doesn't rule out damage above it.

What causes it here

This part of Washington gets a particular combination of conditions that asphalt shingles have to survive year after year. None of it is hurricane-force wind, but it adds up:

The Skagit Valley acts like a funnel between the Cascades and the water, and gusts that build up over the open flats between Burlington and La Conner can hit roofs with more force than the forecast wind speed alone suggests. On the islands — Camano and the Whidbey side near Anacortes — salt-laden air off the Strait accelerates the breakdown of the asphalt and the adhesive strip that seals one shingle course to the next, so shingles there tend to lose their grip a little earlier in their life than the same product would inland. Add in our heavy winter rain, which keeps roofs saturated for long stretches, and a shingle mat that's already softened by moisture has less holding power when a gust catches the tab.

Moss is a factor too, particularly on north-facing or heavily shaded roofs common around Sedro-Woolley and Bellingham, where tree cover and damp shade let it establish. Moss doesn't blow shingles off directly, but it grows under the tab edges and lifts them slightly, which is exactly the kind of gap wind needs to get underneath and start peeling. Older installations where shingles were hand-nailed with a wide nailing pattern, or where the factory sealant strip never fully activated because the roof was installed during a cold snap, are also more vulnerable — the shingle is essentially never fully bonded down in the first place.

Occasional ice and light snow load in the foothill areas toward Lake McMurray and up toward the Cascade foothills can compound this, since a shingle that's been stiffened by cold is more brittle and more likely to crack or tear rather than flex when the wind catches it.

Is it urgent

Generally, yes — but with some nuance. A roof with bare underlayment or exposed decking exposed to our rain pattern needs a tarp or repair within days, not weeks. Underlayment is a secondary barrier, not a roofing surface, and it degrades quickly once it's the only thing between the house and the weather. If a storm is out of the way but more rain is in the forecast (which, in this region, it usually is), that timeline gets shorter.

A handful of missing shingles on an otherwise sound, well-maintained roof is less urgent in the sense that it probably won't cause a leak overnight, but it shouldn't sit unaddressed for a full season either — every additional storm is another chance for the exposed area to grow. We'd also flag one thing plainly: don't get up on a wet or moss-covered roof yourself to check it. Roof pitches on many homes here are steep enough, and moss and moisture make asphalt shingles slick even for people who do this for a living. A pair of binoculars from the ground, or a call to a licensed roofer, is the safer first step.

Repair vs replace

Whether a wind event calls for a patch repair or points toward a full re-roof usually comes down to a few honest questions:

• How old is the roof? A five-year-old roof that lost a dozen shingles in one storm is almost always a repair. A 20-year-old roof that lost shingles is often telling you the whole roof is near the end of its service life, and the storm just exposed it first.
• How widespread is it? A few shingles in one section is a straightforward repair. Damage scattered across multiple slopes, or paired with granule loss and brittleness elsewhere on the roof, suggests the underlying material is failing broadly, not just where the wind happened to grab it.
• Can we match the shingle? Asphalt shingle colors and lines get discontinued. On a roof more than a few years old, an exact match isn't always possible, and a visibly different patch is a legitimate drawback worth knowing about before you commit to a repair-only approach.
• What's underneath? If the underlayment or decking has been exposed to rain for more than a day or two, there may be hidden moisture damage that a simple shingle swap won't address.

Cost-wise, a small wind repair — replacing a handful of shingles and re-securing ridge caps — is typically a modest line item, often in the low hundreds of dollars depending on access and pitch. A full tear-off and re-roof is a much larger investment, generally running from the high four figures into five figures depending on square footage, roof complexity, and material choice. We're not going to quote a number here without seeing the roof, but it's worth knowing the two paths are very different financially before you decide which one you're asking for.

One more thing worth factoring in: if a re-roof is on the table, the Washington State Energy Code sets requirements for insulation and ventilation that come into play any time a roof assembly is opened up during replacement. That's not a reason to avoid a needed replacement, but it's part of why a full re-roof costs more than a like-for-like shingle swap, and it's something a licensed contractor should be accounting for in the scope, not treating as an afterthought.

Prevention

You can't stop the wind that comes off the Skagit flats or down the Strait, but you can reduce how vulnerable a roof is to it:

• Ask for a wind-rated shingle product and proper nailing — six nails per shingle in the field, placed correctly, holds up noticeably better than a four-nail pattern in an area that sees regular gusts
• Keep moss under control on shaded roofs with zinc or copper strips near the ridge and periodic gentle cleaning — don't pressure-wash asphalt shingles, it strips granules and does more harm than the moss
• Keep gutters and downspouts clear so water isn't backing up under the shingle edges during heavy winter rain
• Trim back branches that overhang the roof, common on wooded lots around Sedro-Woolley and inland Whatcom County — falling limbs during wind events cause as much damage as the wind itself
• Have the roof looked at after any storm that produced widespread damage in the area, even if nothing looks obviously wrong from the ground
• On island and near-water properties, expect a somewhat shorter shingle lifespan due to salt air and plan inspections a little more often than you would inland

FAQ

How do I know if my roof was damaged if I can't see missing shingles from the ground?

Check the attic for daylight coming through the decking, fresh water stains, or a musty smell after a storm, and look at gutters for an unusual amount of fresh granules. If anything seems off, or if you just want certainty after a significant windstorm, a physical inspection from someone comfortable on the roof is the only way to catch lifted-but-not-missing shingles, which are often the ones that leak first.

Will homeowners insurance cover wind-blown shingles?

Many policies do cover sudden wind damage, though coverage details, deductibles, and how insurers treat a roof's age vary by policy and carrier. We're not in a position to tell you what your specific policy covers — that's a conversation with your insurance agent — but documenting the damage with photos before any repair work starts will help if you do file a claim.

How long can I wait before repairing storm damage?

If decking or underlayment is exposed, treat it as days, not weeks, given how much rain this region gets outside of summer. If the damage is limited to a few shingles on an otherwise intact roof, you have more flexibility, but leaving it through an entire wet season increases the odds of hidden moisture damage that costs more to fix later than the original repair would have.

Can Alpine Exteriors match my existing shingle color and style?

We'll do our best, and for roofs installed in the last several years an exact or very close match is usually possible. For older roofs where the original product line has been discontinued, we'll tell you that upfront and lay out the realistic options — a close match, a different but complementary color, or, if the roof's age warrants it, a conversation about full replacement instead of patching around a mismatch.

Get a Roof Assessment After the Storm

If a recent windstorm left shingles in your yard or gaps you can see on the roofline anywhere from Mount Vernon and Burlington to Anacortes, La Conner, Stanwood, Camano Island, or Bellingham, it's worth getting eyes on it before the next round of rain moves through. Alpine Exteriors is a licensed Washington contractor (ALPINI751OW) doing roofing, window, deck, and gutter work across Skagit, Island, and Whatcom counties, and we can tell you plainly whether you're looking at a straightforward repair or something bigger — no pressure toward the more expensive answer. Reach out to Alpine Exteriors to schedule a look at the roof and get a clear, honest read on what the wind actually did.