What a Canyon Windstorm Does to a Salt Lake Roof, Gust by Gust

The National Weather Service has clocked canyon winds along the Wasatch Front at over 80 mph, strong enough to flip trailers on I-80 and strip shingles off a roof that looked perfectly fine the day before. Most asphalt shingles carry a wind rating of 110 or 130 mph on paper, but that number assumes a flawless nailing job and sealed tabs. A Salt Lake roof that has baked under high-altitude UV for ten summers does not behave like the lab sample.

October is prime wind season here. The jet stream dips, east canyon winds rip down off the benches, and the gusts arrive before the snow does. That timing matters: wind damage you miss this month becomes a leak once the snow sits on it. Here is how to read the damage by how hard it actually blew.

Under 40 MPH: The Everyday Gusts

Winds in the 25 to 40 mph range feel dramatic from the kitchen window, but they rarely do structural harm on their own. What they do is expose shingles that were already loose or near the end of their life. Think of these gusts as a free stress test.

After a run-of-the-mill fall blow, walk the perimeter from the ground and check:

• Loose debris on the lawn or driveway that clearly came from the roof: shingle granules, bits of ridge cap, chunks of plastic from a vent.
• Shingles that look slightly out of line along the field, like a deck of cards nudged sideways.
• Lifted tabs that did not lay back down once the wind died. A tab that stays curled has lost its seal.
• Flapping or peeling drip edge along the eaves and rakes.

None of this is an emergency. But it is a to-do list before winter, because an unsealed tab is an open door for wind-driven snow.

40 to 60 MPH: When Shingles Start to Lift

This is the band where a tired Salt Lake roof starts giving up shingles. The adhesive strip that bonds each tab to the one below softens in summer heat and gets brittle with age. Once a gust gets under the leading edge, it works the shingle like a lever.

Say a homeowner in the Avenues has a 14-year-old architectural roof and a 55 mph gust sweeps down off the hillside. A realistic outcome is three or four shingles torn clean off a west-facing slope, plus a dozen more with broken seals you cannot see from the yard. The missing ones are obvious. The broken seals are the sneaky part.

Check for:

• Bare patches showing the black underlayment or a lighter, un-weathered shingle beneath.
• Creased shingles, where a tab folded back and cracked across the middle. That crease is a permanent weak line even if it looks fine lying flat again.
• Exposed nail heads on shingles that shifted. Each one is a future rust spot and leak path.
• Granule piles at the downspouts, which point to abrasion as shingles rubbed against each other in the wind.

If you spot any of this, it is worth getting eyes on the roof. Our rundown of catching wind and hail damage early covers what a closer look turns up.

60 MPH and Up: Canyon-Wind Territory

When the east winds really let loose, usually in the foothill neighborhoods from the University area down through Holladay, the damage jumps from “a few shingles” to “sections of the roof.” At this speed the wind stops picking at edges and starts peeling whole courses.

A realistic example: a 70 mph canyon event strips a four-foot-wide band of shingles off the windward slope of a Cottonwood Heights home, tears the ridge cap loose, and bends a furnace vent cap sideways. The roofer would likely find the underlayment torn too, which means water can reach the decking directly.

After a serious blow, look for:

• Large exposed sections, not just scattered gaps.
• Displaced or missing ridge and hip caps, the shingles that sit along the peaks.
• Lifted flashing at chimneys, sidewalls, and skylights, where wind can pry the metal away from the seal.
• Torn or missing underlayment visible under gone shingles.
• Debris impact damage, like gouges from a branch or a neighbor’s loose patio furniture.

This is the point to call for a free inspection sooner rather than later. A roof open to the sky before snow is a winter leak waiting to happen, and a quick patch now beats a ceiling stain in January. If repairs are needed, our guide to what common fixes actually run gives a realistic picture of scope.

What to Do Once the Wind Dies Down

No matter the gust speed, the sequence is the same. Walk the ground perimeter first and photograph anything you find, including the debris. Check interior ceilings and the attic for fresh water stains or daylight. Then get a professional set of eyes on the roof itself, because the worst wind damage, broken seals and lifted flashing, hides from the ground. Homeowners across the Salt Lake City valley can get matched with an independent local roofer for a look before the first snow settles in.

Frequently Asked Questions

My shingles all look flat again after the wind. Doesn’t that mean they’re fine? Not necessarily. A tab can flap in a gust, break its adhesive seal, then settle back down looking normal. The seal is what keeps wind and blowing snow out, and once it is broken the shingle will lift again in the next storm. A hands-on check is the only way to know which tabs are still bonded.

It was only one windy afternoon. Is an inspection really worth it? If you saw gusts strong enough to toss patio furniture or you found shingle pieces in the yard, yes. Inspections are free, and the cost of a missed broken seal is a leak after it snows, which does far more damage inside the house than the original wind did.

Won’t insurance just cover wind damage whenever I get to it? Wind is a covered peril on most Utah policies, but claims go smoother when you document the damage promptly and connect the loss to a specific storm date. Waiting until spring makes it harder to show the damage came from this fall’s wind and not from neglect. A timely inspection gives you dated photos and a written assessment to work from.