Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
Utah's sun does age your roof faster, and the altitude does not. Cloudless summer days drive the oils out of the asphalt, and that is real wear. Altitude is not the problem people assume: it stays cooler up high. We see those roofs last a little longer rather than less.
Judge your roof's exposure by how much unshaded afternoon sun it takes, not by your elevation.
Heat and ultraviolet exposure drive asphalt aging. Higher ground in Utah runs cooler rather than hotter.
Look at which roof planes face west and get no afternoon shade.
The sun is worth worrying about on a Utah roof, and the elevation is not.
Mattie Tueller, Master Roofing
Yes, and it is the strongest aging force on a Utah roof. An asphalt shingle is asphalt held together with oils. Ultraviolet light drives those oils out. The shingle grows stiff and brittle as it loses them. Utah gives that process an unusual number of hours to work in.
Utah is one of the driest states in the country, averaging about 13.4 inches of precipitation a year according to NOAA. Dryness itself does not hurt the roof. What comes with it does: dry air means cloudless days. Cloudless days mean the sun works on your shingles from morning to evening with nothing in the way.
The granules on top of the shingle are the shield. The Asphalt Roofing Manufacturers Association describes them as the layer protecting the asphalt from ultraviolet light, moisture, and ozone. While the granules stay put, they take the hit. Once they wash off, the asphalt underneath is exposed and the clock speeds up.
How that aging shows up on your roof is covered in why asphalt shingles do not last as long as they used to.
No, and this is the part most homeowners have backwards. Altitude is not hard on a roof. It stays cooler up there, and in our experience roofs at higher elevation in Utah last a little longer than the same roof in the valley, not less.
Elevation changes plenty about a roof, just not how fast the sun wears it out. The assumption is reasonable: thinner air does mean more ultraviolet reaching the ground. So higher sounds like it should be harder. But temperature does more work than ultraviolet in aging asphalt, and the mountains are cooler.
Air cools at roughly 3.5 degrees Fahrenheit per thousand feet of elevation. So a mountain roof really runs cooler than the same roof down in the valley, every summer afternoon of its life.
What really changes up high is everything else: snow load, ice damming, the grade of ice shield the roof needs, and wildfire exposure. Those are real, and they are expensive to get wrong. They are covered separately in why roofs up in the mountains need something different.
Mostly it bleaches the color out. On asphalt shingles, heavy sun exposure fades the granule color over years. That is a cosmetic change rather than a structural one. The roof is not failing because it looks lighter than it did.
Most homeowners never notice. The ones who do are usually comparing a sunny slope against a shaded one on their own house. That's exactly the comparison that makes fading visible.
On a metal roof, color is a decision you live with for decades. Some colors do not hold up in Utah sun.
Ask for the manufacturer's finish warranty in writing and read what it says about fade specifically. That's because fade coverage and rust coverage are usually separate terms.
It should change two decisions, and neither one is the material. Pick the color knowing it will fade on the sunny planes. Get the ventilation right. That's because heat trapped under the deck ages shingles faster than anything the sun does from above.
Material choice matters less here than most people expect. If you want the comparison for Utah conditions, that is a separate question answered in what roofing material lasts longest in Utah's weather.
Sun exposure is worth understanding, but it is a slow force and a predictable one. It is not usually the thing that decides which roof goes on your house. It is not a reason to replace a roof early.
Homeowners up the canyons ask me this one a lot, usually because someone told them mountain sun is brutal on a roof and they should expect to replace it sooner. At Master Roofing we work both sides of the Wasatch. What we actually see is the opposite. Those roofs tend to last a little longer. It is cooler up there.
It would be easy to let that assumption stand. Nobody would ever check it. But if I tell you the mountain is aging your roof and it is not, then I have spent your attention on the wrong thing. Attention is the one thing a homeowner has a limited amount of when a five-figure decision lands.
The sun is worth worrying about on a Utah roof. The elevation is not. So put your attention where it changes the outcome. Up high that means snow load, the grade of ice shield under your valleys, and fire. Everywhere in Utah it means ventilation and which direction your roof faces. Sun exposure is real, but it is slow. Knowing it is slow is what keeps you from being talked into replacing a roof that has years left.
This article is general information about Utah roofs, not an assessment of yours. Every roof is different, and no article can tell you what is actually happening on your specific house. Have a licensed roofing contractor look at it in person before you act on anything here.
Usually yes. The planes taking direct afternoon sun collect the most ultraviolet exposure and the most heat. So they age ahead of north-facing planes on the same house. It is common to see one slope noticeably more weathered than another on a roof of a single age. That is normal, and it is a good reason to have someone look at all sides rather than one.
The effect is smaller than people hope. A lighter surface reflects more heat, which helps a little. But attic ventilation moves far more heat out of a roof assembly than shingle color reflects away from it. Choose the color you want on your house. Spend the attention on getting the ventilation right, because that is where the real temperature difference is won.
Southern Utah is hotter and takes more intense sun for more of the year. So yes, heat and ultraviolet exposure work harder on a roof down there than they do up here. Master Roofing serves the Wasatch Front and Back rather than the southern part of the state. So treat that as general climate reasoning rather than something we have measured on our own jobs.
Snow cover does block ultraviolet light while it is there. But it brings its own problems that far outweigh the benefit. Standing snow and the meltwater underneath it drive ice damming. Prolonged moisture against a roof causes more trouble in Utah than a few weeks of shaded winter sun ever saves. Nobody should think of snow as roof protection.
For aging asphalt shingles there are rejuvenation treatments that restore some pliability to shingles that have dried out over time. That's a different question from blocking ultraviolet light. Coatings marketed as sun protection for residential shingles are generally not worth the money. Some of them will void the manufacturer's warranty outright. Check what your shingle manufacturer permits before anyone sprays anything up there.
We're here to see what's going on with your roof. A real assessment starts with your history and your attic, not a number from the driveway. You'll get a straight answer about what's up there, what it needs, and what it costs. Sometimes the honest answer is: your roof looks great.