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Serving Cedar City, UT and surrounding areas. (435) 592-8002
Cedar City winters are cold and your heating dollars are escaping through gaps above your ceiling. We find every one and seal it permanently, with blower door proof before and after.
Attic air sealing in Cedar City finds and closes the gaps in your attic floor that let heated or cooled air escape from your living space - most jobs take two to six hours and deliver a measurable improvement on the same day the crew leaves. These gaps form around light fixtures, plumbing pipes, wiring runs, and wall framing. They are invisible from below but allow a significant amount of the air your heating and cooling system produces to escape before it can do its job.
Cedar City sits at nearly 5,800 feet elevation in Climate Zone 5, with winters that drop well below 10 degrees and summers that push attic temperatures past 130 degrees. Your heating and cooling system runs hard in both directions. A leaky attic floor is the single biggest reason those systems work harder than they should - and the most cost-effective place to start addressing your home comfort and energy bill at the same time.
Attic air sealing pairs well with retrofit insulation for maximum results. Sealing first and then adding insulation on top is the correct sequence - doing it the other way around buries the gaps and leaves most of the air leakage problem unsolved.
Cedar City winters regularly push overnight lows into the single digits from December through February. If your heating bill climbs sharply each season even though you keep the thermostat steady, your attic is almost certainly letting warm air escape. Heat rises, and an unsealed attic floor is the most direct path out of your home.
If certain rooms are always colder in winter or stuffier in summer than the rest of the house, conditioned air is likely escaping through the attic above those areas. This is especially common in Cedar City homes built in the 1970s and 1980s where insulation has settled and shifted over the years, leaving gaps exposed.
Cedar City is in the high desert, and wind-blown dust is a constant seasonal presence. If your surfaces collect dust quickly, especially after windy spring days, air is being pulled into your home through gaps in the attic floor. Those gaps do not just let air through - they let everything that is in that air through too.
If you look into your attic and can see the wood framing between the insulation, your home is under-insulated and almost certainly unsealed. Visible joists are a reliable indicator that heat is escaping through both missing insulation and unsealed gaps. Attic air sealing should always happen before new insulation is added.
We start every attic air sealing project with a blower door test - a large fan mounted in your front door that depressurizes the house and measures exactly how leaky it is before any work begins. That number tells us where to focus and gives you a concrete before-and-after comparison when we finish. The sealing work covers every gap we find in the attic floor: light fixture boxes, plumbing and wiring penetrations, wall top plates, and any other pathway between your living space and the unconditioned attic above. Materials are matched to the size and location of each gap - foam for larger openings, caulk for cracks, and rigid blocking for the biggest areas.
Attic air sealing is not an isolated fix. We often discuss it in combination with retrofit insulation for homes that have both insufficient insulation depth and unsealed gaps, and with broader air sealing services that cover the rim joist and crawl space as well. The combination addresses the full thermal envelope instead of just one section of it.
Closes gaps around light fixtures, plumbing stacks, wiring, and wall tops - the primary air leakage plane in most Cedar City homes.
Best for homeowners who want a measured before-and-after result rather than a visual estimate.
Older Cedar City homes with many can lights lose significant heat through those fixtures - we cap and seal each one.
Ideal for homes with multiple stories where air moves from floor to floor through wall cavities and framing gaps.
Cedar City is in IECC Climate Zone 5 - a category that includes genuinely cold winters, hot summers, and significant UV exposure at high elevation. The city averages around 30 inches of snow per year, and January overnight lows regularly fall into the single digits. That temperature range puts a real load on your heating system, and a leaky attic floor is the most direct reason that system runs longer and costs more than it should. Many Cedar City homes built in the 1960s through the 1980s were never designed with air sealing in mind, which means they have been leaking heat through the same gaps for decades. The U.S. Department of Energy estimates that sealing air leaks can cut heating and cooling costs by up to 20 percent. In Cedar City, where your system runs hard for most of the year, that is a meaningful return.
The dry, dusty climate adds another layer of urgency. Cedar City gets wind-driven desert dust in spring and wildfire smoke from surrounding southern Utah forests in summer. Every gap in your attic floor is a pathway for that outdoor air to be pulled into your living space. Homeowners in neighborhoods like Parowan and throughout the Cedar City area who have had their attics sealed consistently report cleaner indoor air and less dust accumulation on surfaces. The Building Performance Institute recommends a blower door test as the baseline diagnostic for any home performance project - it is the only way to know for certain where your leaks actually are.
When you reach out, we ask about your home age, any comfort issues you have noticed, and whether you have easy attic access. We respond within 1 business day to schedule your in-home assessment at a time that works for you.
We walk your home and run a blower door test to measure how much air is leaking before we touch anything. That measurement tells us where the biggest leaks are and gives you a baseline to compare against after the work is done.
You get a written estimate that breaks down exactly what will be sealed and what it costs. We will also walk you through the Rocky Mountain Power Wattsmart rebate and the federal tax credit so you know what you can recover before you decide.
The crew works methodically across your attic floor, sealing every gap with foam, caulk, or rigid blocking depending on the size of the opening. A second blower door test at the end confirms the leakage was reduced and gives you documented before-and-after numbers.
Free written estimate. No obligation. We respond within 1 business day.
(435) 592-8002We do not guess at where your leaks are. A blower door test measures the actual air leakage before we start and again when we finish. You leave with a documented improvement - not just a promise that the work was done.
At nearly 5,800 feet in the high desert, Cedar City puts homes through more temperature stress than most Utah cities. We know which gaps matter most in this climate, which sealing materials hold up through freeze-thaw cycles, and how to keep your attic ventilation correct after sealing.
The federal 30 percent tax credit and Rocky Mountain Power Wattsmart rebates can take a significant amount off your total cost. We handle the documentation as part of the job so you have everything you need to file both claims without scrambling afterward.
We have worked on homes all across Cedar City - from older neighborhoods near Southern Utah University to newer subdivisions on the west side of town. We know the construction patterns here and have seen the same air leakage problems in home after home across Iron County.
Attic air sealing is one of the highest-return upgrades a Cedar City homeowner can make - but only when it is done thoroughly and verified with diagnostic testing. We combine local knowledge, proper equipment, and honest documentation so you know exactly what you paid for and have the paperwork to back it up.
Air sealing and retrofit insulation are the most effective pairing for Cedar City homes built before the mid-1990s.
Learn moreWhole-home air sealing covers the attic, rim joist, crawl space, and walls in a single coordinated project.
Learn moreCedar City winters start early - lock in your appointment before the cold arrives and your heating bill climbs again.