Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
A hot upstairs, winter drips on a dry day, ice dams, and a denied warranty claim are four symptoms of one problem above your ceiling.
Four different problems send Utah homeowners looking for four different contractors. A bedroom that will not cool down. Water dripping in winter on a dry day. Ice hanging over the front door. A warranty claim that gets denied. They are usually the same problem, and it is not your roof.
· About a 12 minute read
Nine out of ten Utah attics quietly fail a code number that nobody ever measures. Yours can be checked with a thermometer.
Mattie Tueller, Master Roofing
These four complaints arrive separately, in different seasons, and usually send people to different contractors. They are normally one problem.
The air conditioner runs all day. The top floor stays hot well after sundown. An HVAC tech comes out and finds nothing wrong with the unit, because nothing is.
It has not rained in two weeks and the ceiling is wet. In bad cases every nail in the roof deck overhead is dripping, with frost on the tips.
A ridge of ice builds at the eave every January, and water starts backing up under the shingles behind it. Someone offers to chip it off again next year.
The shingles are curling at year ten. The paperwork is in a drawer. Then somebody goes in the attic and the coverage turns out not to apply.
One cause sits behind all four. The attic is not breathing, and it has not been since the day the roof went on.
Because the odds are better than even that it is your house. About 90 of every 100 Utah attics we open up are not moving the air the code calls for.
And because it is cheap to fix relative to what it costs to ignore. This is one of the most fixable problems in roofing. It just has to be found first, and nothing in your house is going to announce it.
Almost everybody knows attics have vents. Far fewer know that the system only works if air can get in as well as out.
Air comes in low, warms, rises, and leaves high. That movement is what carries the day's heat back out of your attic, and it is what carries moisture out in winter.
Take away the intake and the whole thing stops. Exhaust vents with nothing feeding them cannot pull air out of a sealed box. The attic just sits there, holding whatever the day gave it. Intake is the half most Utah roofs are missing.
Three plain reasons, and none of them involve anybody being dishonest.
An asphalt shingle is protected on two sides. The granules on top block the sun. Airflow underneath carries heat away from below.
Lose the airflow and the shingle bakes from underneath every day of its life. That is why ventilation belongs in a conversation about roofing rather than in one about heating and cooling.
Here is the part that explains how this became normal across an entire state.
Attic ventilation is not a judgment call or an upgrade. The residential code sets a ratio, and Utah adopted the 2021 International Residential Code.
That last number is the one that matters. A city inspector verifies that the permitted work happened. Nobody runs the intake and exhaust math against your attic's square footage.
So an under-ventilated roof passes inspection every day of the week. Homeowners who did everything right, pulled the permit, and got the sign-off are told years later that their attic fails the one ratio the code actually spells out. Both things are true at once.
Code is the bare minimum for standing up a structure. It is not the same as the right way to do it. And in this case, even the bare minimum goes unmeasured.
Only the company you hire, and only if they choose to. To be fair to the crews who did not, Utah licensing never required anyone to learn this. Nobody was taught that the ratio is a code number rather than a rule of thumb. No inspector was ever going to stop them.
But you are the one living under the result for the next twenty years. So the question has to come from you.
Ask any bidder three things in writing. What intake do I have now. What does the ratio require for my attic. What are you adding to get there.
The signature symptom is not that the upstairs gets hot. It is that it stays hot after dark.
An under-ventilated attic cooks your house like a phone book left in the oven. The heat soaks in all day and keeps radiating out long after the source is gone. Your bedrooms are directly underneath it.
The hottest attic ever measured on one of our assessments was 180 degrees. No air conditioner on earth wins against that from below.
This sorts itself in one afternoon and costs nothing.
Why families spend a whole summer on the wrong thing. The symptom is a hot bedroom and a struggling air conditioner, so everyone stares at the machine. Thermostat wars, window units in the kids' rooms, an HVAC tech out twice who found nothing wrong. He was right. The unit is fine. Nobody thinks to look up.
The discomfort is the part you feel. The wear is the part you pay for later.
Every one of those hot days is aging the shingles from underneath while Utah's sun ages them from above. A roof over a properly vented attic reaches the slow end of its lifespan. A roof over a hot one does not, no matter which shingle you bought.
That is why a mid-range shingle over a vented attic will outlast a premium one over a hot attic. It is also why budgeting the ventilation before the material upgrade is the better order to spend in.
Winter turns the identical problem inside out. Now it is moisture instead of heat, and it comes from inside your own house.
Warm, moist air rises out of your living space. It hits the cold underside of the roof deck and condenses there. The water forms inside the attic rather than coming in from outside.
In bad cases every nail overhead is dripping, with frost on the tips, while the sky outside is bone dry.
How to tell condensation from a real leak. Condensation appears evenly across the underside of the roof deck and at nail points. A genuine leak follows a single path from one failure. The difference changes who you should call and what it should cost.
Utah's dry climate does not protect you here, because the moisture is not coming from the weather. A winter's worth of showers, cooking, and laundry gets pushed upward into an attic that cannot breathe it out.
People assume mold is a Gulf Coast problem. Then you open a Utah attic hatch in January and find sheathing black with growth and insulation damp to the touch. The house made that weather all by itself.
Mold can start growing on wet material within 24 to 48 hours. Wood that never fully dries in a closed attic keeps feeding it.
Heat escaping into the attic melts the snowpack from underneath, where it touches the shingles. That meltwater runs down to the eave, which is cold because there is no attic under it, and refreezes.
The ridge of ice backs standing water up under the shingles, and shingles were never built to hold water back uphill.
So the ice hanging over your door was not made by the weather. It was made by the heat leaving your house. Until that stops, the roof keeps producing meltwater every time the sun comes out.
This is the cost that stays completely invisible until the exact moment you need the coverage.
Shingle manufacturers exclude damage caused by inadequate ventilation. It is not hidden. The GAF Roofing System Limited Warranty names it directly in what it does not cover.
The exclusion does not cancel your whole warranty. It removes coverage for exactly the failures that under-ventilation causes, which are the failures you are most likely to have.
The timing is what makes this brutal. Homeowners find out at claim time, years after the roof was installed and paid for. The roof is a decade old, the shingles are curling, and the paperwork is in a drawer. Everyone is certain they are covered. Then someone goes in the attic.
The manufacturer printed the exclusion right there in the document nobody reads. The crew that never learned the ratio is a code number was not setting out to strip your coverage. It is a gap that everyone walks past.
Which means a Utah homeowner can buy the best shingle on the market and still get caught. The warranty will not cover the way that roof is actually going to fail.
On the day you sign for a new roof, ask for your attic's ventilation numbers in writing. Your intake, your exhaust, your attic square footage, and the ratio they produce.
Keep that page with the warranty. Nobody can reconstruct it years later, which is exactly why it is worth having on day one.
You are not out of options. Get the attic assessed and get the numbers now. Adding intake, balancing exhaust, and clearing buried vents is real work but it is a fraction of a new roof. Documented afterward, it also puts you back on the right side of the exclusion going forward.
Here is the most common way a Utah attic gets worse, and it usually starts with someone trying to make their house better.
A homeowner pays for blown attic insulation. The house gets less comfortable. They assume they were sold something that did not work.
The insulation usually worked fine. It just landed on top of the intake vents at the eaves. The attic quietly lost the airflow that was carrying the day's heat back out.
Insulation and ventilation do two different jobs. Insulation slows heat moving into your living space. Ventilation removes heat from the attic. One cannot substitute for the other, and in a Utah summer the airflow was often doing the harder job.
A baffle is an inexpensive channel that holds an air path open at the eave so insulation cannot block it. They are cheap, they are standard, and insulation crews do not always install them.
To be fair, this is a gap between two trades rather than anybody cutting corners. The insulation crew is scoped to insulate. The roofing crew was there years earlier. The space between those two scopes sits in your eaves, and no one owns it.
Go to the edge of the attic where the roof meets the outside wall, and look down toward the eave. You are looking for a clear air path and for daylight at the vents. Insulation packed right up against the underside of the roof deck at the eave is the problem.
Ask one question before the crew starts. How are you keeping the intake vents clear, and are you installing baffles?
If the answer is uncertain, get the ventilation looked at first. It is a cheap question now and an expensive discovery later. And if you are doing a new roof and new insulation in the same season, tell each crew what the other one is doing.
You do not need a contractor to find out whether this is your problem. You need a flashlight, a thermometer, and one trip up the hatch.
Compare the attic to the outside air. Within about twenty degrees is healthy. Far past that is your answer, and it is the single most useful measurement in this whole guide.
Go to where the roof meets the outside wall and look down toward the eave. You want a clear air path and light coming through the vents. Insulation packed against the roof deck there means the intake is buried.
Look at the nails poking through the roof deck. Frost or moisture on the nail tips, or damp insulation, means household moisture is condensing up there instead of leaving.
What intake do I have now, what does the ratio require, and what are you adding? Get it in writing. A company that cannot answer has not measured it, which tells you what the bid is missing.
The ventilation numbers from installation day are the only practical protection against a ventilation exclusion later. Nobody can reconstruct them years afterward.
One more thing while you are up there. Check where your bathroom and kitchen fans discharge. A fan venting into the attic instead of outside is pumping moist air straight into the space you are trying to dry out.
Ten minutes, twice a year. That is the whole habit, and it is the cheapest thing in roofing.
By the time I get called about a hot upstairs, the family has usually spent a whole summer fighting it. Thermostat wars, window units in the kids' rooms, an air conditioning tech out twice who found nothing wrong.
He was right. The unit is fine. Everyone is staring at the machine, and the attic is running the whole show.
What gets me about the warranty version of this is the timing. We meet those homeowners years after anybody could have helped them cheaply. The roof is a decade old, the shingles are curling, the paperwork is in a drawer, and they are certain they are covered. Then someone goes in the attic.
Here is the fair part, and it matters. Nobody in that chain was hiding anything. The manufacturer printed the exclusion right there in a document nobody reads. The crew that left the intake off was never taught that the ratio is a code number rather than a rule of thumb. No inspector was ever going to measure it. It is a gap that everyone walks past, and the homeowner is the one standing under it.
So Master Roofing looks in the attic before recommending anything that goes on top of it. Intake ventilation gets priced to the required ratio on every job.
Even so, the check that matters most is one you can run yourself this week. Take a thermometer into your attic on a hot afternoon. If it is much more than twenty degrees above the outside air, you have found the thing behind all four problems. And you found it without paying anybody.
You can buy the best shingle on the market and still get a short roof. What decides the difference is mostly invisible: whether air moves through the space above your ceiling.
The ratio is a published code number. No inspection measures it. About 90 of every 100 Utah attics do not meet it. And the same gap shows up as summer heat, winter condensation, ice dams, and a warranty that quietly stops applying.
None of that is exotic and none of it is expensive to fix relative to what it costs to leave alone. It just has to be found, and nothing in your house is going to tell you.
So go find out. A thermometer, a flashlight, and ten minutes settles it. Then make every company that bids your roof put the numbers in writing.
Your attic is either working for you every day or working against you every night. Ten minutes tells you which.
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.
Take a thermometer up there on a hot afternoon and compare it with the outside temperature. A healthy attic runs within about twenty degrees of outside. Much hotter than that and the attic is not moving air. Then check the eaves, where the roof meets the outside wall. You want a clear air path and daylight at the vents rather than insulation packed against the roof deck. On a cold morning, look at the nail tips coming through the deck. Frost or moisture there means household air is condensing in the attic instead of leaving it.
The residential code sets a ratio rather than a fixed number of vents. It is roughly 1 square foot of net free vent area for every 150 square feet of attic. That becomes 1 per 300 when the venting is properly balanced between intake at the eaves and exhaust up high. Utah adopted the 2021 International Residential Code, so this applies statewide. The important part is that it is a calculation against your specific attic's square footage. Ask any roofing company to show you that math for your house, in writing, rather than a general assurance.
Because the inspection did not measure it. A city inspector verifies that the permitted scope of work happened. Nobody runs the intake and exhaust math against your attic square footage, so an under-ventilated roof passes inspection routinely. Both things are true at once: you did everything right, and the ratio still was not met. Building code is the bare minimum for standing up a structure rather than a standard of care. In this case even the bare minimum goes unmeasured. The only person who checks is the company you hire, and only if they choose to.
It can remove coverage for the failures it causes, which are the ones you are most likely to have. Shingle manufacturers exclude damage caused by inadequate ventilation, and the GAF limited warranty names it directly in its exclusions. It does not cancel the whole warranty. The problem is the timing. Homeowners discover it at claim time, a decade after the roof was paid for. The protection is one page. On the day you sign, ask for your attic's ventilation numbers in writing and file them with the warranty. Nobody can reconstruct that later.
The insulation almost certainly buried your intake vents. Blown insulation piles up at the eaves, which is exactly where the attic pulls its air in. So you added R-value and removed airflow at the same time, and in a Utah summer the airflow was doing the harder job. Insulation slows heat moving into your living space. Ventilation removes heat from the attic. Neither substitutes for the other. The fix is usually baffles, which are inexpensive channels that hold the air path open at the eave. You rarely need to remove the insulation.
Usually condensation, and the pattern tells you which. Condensation shows up evenly across the underside of the roof deck and at the nail points, often with frost on the nail tips. A genuine leak follows a single path from one failure and tracks with rain or snowmelt. Utah's dry climate does not prevent it, because the moisture comes from inside your house rather than the sky. A winter of showers, cooking, and laundry gets pushed up into an attic that cannot breathe it out. A roofer patching shingles will not fix that.
Three things, and it is far less disruptive than people expect. Adding intake where it is missing or blocked, usually at the eaves. Balancing the exhaust up high so the two halves work together rather than fighting. And clearing vents that insulation has buried, often with baffles. It is real work, but it costs a fraction of a new roof. It can usually be done without touching the roof covering at all. Get the numbers documented afterward, because that paperwork is what protects your warranty position going forward.
In most cases yes, and often noticeably. The reason a top floor stays hot after sundown is that the attic stored the day's heat and keeps radiating it downward. Moving that heat out is exactly what ventilation does. It also takes load off an air conditioner that has been fighting a losing battle from below. Run the thermometer test first, though, so you know which problem you have. If the attic is already within about twenty degrees of outside, ventilation is not your issue and the money belongs with the HVAC company instead.
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.