Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
One of these rules only matters the day you replace your roof. The other one can raise your fees and change your insurance right now, whether you touch your roof or not.
Two Utah wildfire rules changed at once, and people keep mixing them up. One decides what you are allowed to put on your roof when you replace it. The other decides what you pay in fees and how your insurance company rates your house. Here is which one applies to you, and how to find out in an afternoon.
· About a 12 minute read
Embers do not land in the middle of your roof. They land at the eave, the vent, and the gutter. That is exactly where most Utah roofs are still built the old way.
Mattie Tueller, Master Roofing
Utah changed two wildfire rules at almost the same time. People mix them up constantly. They are not the same thing. They use different maps. They are handled by different offices. And only one of them says anything about your roof.
Its full name is the Wildland-Urban Interface code. That just means the places where neighborhoods meet wild land. Cities and counties had to adopt it by January 1, 2026. This is the one that covers your roof, your vents, and the brush around your house.
A law passed in 2025. It drew a statewide high-risk map. If you are on that map, you pay a yearly fee. Your insurance company also has to use that map. It says nothing at all about roofing materials.
So there are four places you could land. You might be inside your city's fire area. You might be on the state's high-risk map. You might be on both. You might be on neither. Each one is a different phone call.
This matters most when someone is bidding your roof. If a salesman tells you "the state made Class A the law," he has mixed the two rules together. He also got the roof part wrong. Here is what the roof part actually says.
Roofs get fire-tested and sorted into three grades. Class A resists fire best. Class B is next. Then Class C. Utah's fire areas require Class A or Class B. That little word "or" changes what you have to buy.
Utah County's rule is a good example. It is written plainly enough to read yourself:
"Roof coverings shall be constructed of UL listed Class A or B materials in accordance with the International Building Code, or shall be constructed of an approved non-combustible roof covering. No wood roof coverings are permitted in the Urban Interface."
Three things come out of that one sentence. All three get reported wrong.
Your city or county can ask for more than the minimum. Many do. That is why the real answer lives at your building department and nowhere else.
Here is the most common way a roof looks fine and still fails. Somebody checked the shingle instead of the whole roof.
A roof earns its fire grade as a system. The shingle is one part. The underlayment under it is another part. Sometimes the wood deck counts too. Swap the underlayment for something cheaper and the same shingle can drop a grade.
"It's rated" is not an answer. A real answer has two parts. Anyone who does this work can give you both on the spot:
Ask for both in writing before you sign. It costs an honest bidder nothing. It tells you a lot about the rest.
There is one more detail in the code that almost never comes up in a sales visit. Some roofs leave a small gap between the covering and the wood underneath. Tile does this. So do most metal panels. The code says that gap has to be sealed at the eave, so flames and embers cannot crawl in under the roof. It is real work with a real cost. You cannot see it from the driveway once it is done. That makes it easy to leave out of a cheap bid.
Read the fire code all the way through and something jumps out. Roof coverings get one short paragraph. Eaves, gutters, vents, and windows get much more.
That is on purpose. It is how houses actually burn.
Most homes lost in a wildfire are not hit by a wall of flame. They are hit by embers. Embers blow ahead of the fire, land on the house, and look for a way in. The middle of a Class A roof is a bad landing spot for an ember. A plastic gutter packed with dry pine needles is a great one. So is a small vent that opens straight into a dry attic.
This is the part worth remembering. Meeting the wildfire code is not something you buy. It is how the edge of your roof gets built. And the edge is the part you cannot see from the ground, cannot check yourself, and will never be shown a photo of.
The code is very specific about the edges. These numbers are worth knowing before anyone quotes you:
Two more rules at the edge. Both are easy to miss and cheap to get wrong.
Gutters and downspouts cannot burn. That rules out the vinyl gutter you see on Utah houses every day. And exposed rafter tails are not allowed unless they are heavy timber. That changes the look of a lot of mountain homes. Settle it when you take bids, not on the day the crew shows up.
This is the conflict almost nobody warns you about. Fixing one problem can quietly create another.
The fire code says attic vents cannot go in soffits or eave overhangs. Soffits are the flat panels under the edge of your roof, where it hangs past the wall.
Now think about how a normal Utah roof breathes. Air comes in low, through vents in the soffit. It rises through the attic. It goes out high, at the peak. Soffit vents are how nearly every house in this state takes in air. The fire code takes that away.
That is a bigger deal here than it would be elsewhere, because Utah attics are already short on air. Around nine out of ten homes we open up are not moving the air the code calls for. You feel it in both seasons. In summer the attic bakes and the upstairs will not cool down after dark. In winter you get condensation, and every nail in the roof deck drips. Poor venting also voids most shingle warranties, which you find out at the worst possible time.
You can do both. You just cannot do both by accident, and you cannot do it with the same package the crew puts on every house.
One more thing. An insulation crew can undo all of this in an afternoon by blowing insulation over the intake vents. If you are doing a new roof and new insulation in the same season, tell each crew what the other one is doing.
If your roof is in good shape, none of this forces you to touch it. The rule follows the work, not the age of your roof. An older roof that does not meet the code is allowed to stay.
Replacing it is what starts the clock. Utah County puts it this way: "when one-half or more of an existing non-conforming roof covering needs to be replaced, the entire roof shall be brought into compliance with this code." Some cities word it as half or more within any 12 months. Check how yours says it. Either way the idea is the same. A small repair does not pull you in. A real roof replacement does.
So the timing matters. The day you decide to replace your roof is the day this becomes yours. Handle it first, not halfway through:
House Bill 48 is the one you feel in your wallet. It is not a building code. It will not tell you what roof to buy.
What it does is draw a statewide high-risk map. The Utah Division of Forestry, Fire and State Lands keeps that map. If your property is on it, three things follow.
That last one is why you should check the state map even if your city has no fire code. Your insurer is working from a real, published map now. Finding out which side of it you are on is free. It is much better to know before you spend five figures on a roof than after.
If a new roof is coming, call your insurance agent the same month you call roofers. What you build and what you pay to insure it are tied together now in a way they were not two years ago.
All of this comes down to a short list you can finish in one afternoon. You do not have to hire anyone. You do not have to take a roofer's word for any of it.
Give them your address. Ask three things. Did you adopt the wildfire code? Is my property in the mapped area? What roof grade do you require here? Their answer is the one your permit gets judged against.
Ask for the code section, or just an email you can forward. Cities change the rules a little when they adopt them, and that is what makes one address different from another. Send it to every bidder so they all quote the same job.
This is the other map, the House Bill 48 one. It is the map your insurance company has to use. It controls fees and premiums, not roofing. You can be on it even if the building code does not apply to you.
Fire departments usually hold the maps everything else is built on, and they are generous with their time. They will also tell you what to clear around the house. That has nothing to do with the roof and everything to do with whether it survives.
Then get your bids. Four phone calls before the quotes will do more for your roof than any amount of comparing quotes after.
Our whole state has been on fire. At one point there were five wildfires within thirty minutes of my house. That is the world I read this code in. It did not show up here early. If anything it showed up late.
What I keep running into is that the conversation stops at the shingle. Somebody gets told they need Class A. They buy Class A. They think the fire question is handled. Meanwhile the gutters are plastic. The metal roof is open at the eaves. The attic is breathing through soffit vents the code does not allow. The expensive part got done right and the cheap parts did not. That is backwards.
To be fair, this is genuinely hard to keep straight. Two rules landed at once. They use two maps. One of them changes city by city. A company working across five counties can honestly lose track of which rules land where. Nobody made the industry read this, and it came fast.
So Master Roofing tracks it county by county across the parts of Utah we work in. When the soffit vents come off the table, we redraw the venting plan instead of quietly dropping it. Even then, I would rather you not take my word for it. Call your building department, give them your address, and ask what they require. Ten minutes, and it is settled before anybody quotes you. A roof you can check on is worth more than a roof somebody promised you.
If you take one thing from this, take this. The covering is the easy part. Class A or Class B, no wood, rated as a whole system. Once you know what your city requires, that part mostly takes care of itself.
The parts that decide whether your roof holds up are at the edges. The sealed gap at the eave. Gutters that will not burn. Soffits closed in. Vents that are the right size, screened, and moved off the eave without starving your attic of air. Those are choices a crew makes on a day you are probably at work. And you will never see any of them once the job is done.
That is why the four phone calls come first. You cannot inspect the edges later. But you can make every bidder tell you in writing what they plan to do there. And you can find out ahead of time what your city will actually check.
You will never see the edge of your finished roof. You can still be the reason it was done right.
Building codes, permit rules, and licensing requirements change over time, and they differ by city and county across Utah. Verify current requirements with your local building department before relying on anything here, and work with a licensed contractor who knows the rules in your jurisdiction.
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.
No. The rule follows the work, not the age of your roof. A roof in good shape is not forced out by the code. What starts the clock is replacing the roof, or replacing half or more of the covering. Until then this is something to plan for, not react to. If a new roof is a few years out, do one thing now. Find out whether your property is in your city's mapped fire area, and write the answer down somewhere you will find it later. That one fact changes what your roof will cost and what it has to be made of. Knowing it early gives you years to save instead of weeks.
Utah's fire areas require a Class A or a Class B roof, or a covering that does not burn at all. Wood roofs are not allowed either way. Class A is the better grade, but it is not automatically required. Cities can ask for more than the minimum, and some do. That is the question to put to your building department. Ask them for the code section instead of just a verbal answer. Then send it to every company bidding your roof. Two good things happen. All the bids start describing the same job. And any bidder who quotes a lower grade has to explain why in writing.
No. The rule is about how the roof performs in a fire test, not about one material. Several roof types pass in the right setup. Metal comes up a lot near the mountains because it does not burn on its own. It already made sense up there for snow and ice reasons. It is a good option in a fire area, not a required one. Wood is the clear exception, and no treatment claim brings it back. If you do choose metal, ask exactly how they are sealing the gap at the eave. Metal panels leave a space underneath, and the code says that space has to be closed.
Because embers blow ahead of a fire looking for a way in. A vent is a hole that leads straight into a dry attic full of wood. That is why the code limits any single vent to 144 square inches. It also requires metal screen that will not rust or burn, with holes no bigger than a quarter inch. And it bans attic vents in soffits and eave overhangs entirely. Ask for ember-resistant vents by name. Those are tested to stop flames and embers, which a plain screened hole is not. One more thing you can do yourself. Clear the pine needles and leaves out of your gutters once a year. A packed gutter sits right against the eave and catches embers.
It can, but only if somebody actually plans it instead of using the standard package. Most Utah homes take in air through vents in the soffit, and the fire code takes that spot away. The amount of air your attic needs does not change with it. Depending on your roof, the intake can move above the fascia board, onto the roof set back from the edge, or into the gable ends. Ask any bidder to write down how much venting your attic needs and how their plan gets there without soffit vents. And if you are adding insulation the same season, tell both crews about each other. Insulation blown over the intake vents undoes the whole plan.
No, it is a different system. The fee comes from House Bill 48, not from the building code. It applies to buildings inside the state's high-risk map. For 2026 and 2027 it is a flat fee based on the square footage of your buildings. Starting in 2028 it also depends on a risk check of your property. The check is not required by law, but skipping it puts you in the highest fee group. You can owe this fee even if your city's roof rule does not apply to you at all. The two systems use different maps, so check both. One answer does not settle the other.
It can. House Bill 48 requires insurance companies to use the state's high-risk map when they rate wildfire risk. So where you sit on that map now affects your premium in a way it did not before. The law also says they have to tell you if your premium goes up more than 20 percent, or if they drop your coverage. You should get a real notice, not a mystery bill. Call your agent and ask where your property falls on the map, especially if a new roof is coming. While you have them, ask one more thing. Does the roof you are planning change anything on their end? Get that answer before you sign a roofing contract.
Ask about the edges, not the shingle. Anybody can say Class A. The questions that sort people out are these. How are you sealing the gap at the eave? What are you doing about the gutters, since they cannot burn? Where is the attic air coming in now that soffit vents are out? And have you pulled a permit for this in my city? A company that has done this work answers all four without stalling, and can name the city. A company that has not will steer you back to the shingle. Or they will tell you the state made Class A the law, which is the tell that they have mixed the two rules together.
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.