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Your attic floor is full of small gaps that silently drain heated air all winter and let attic heat push into your home all summer. We find and close every one of them - and prove it with a blower door test.
Attic air sealing in Twin Falls means finding and plugging every gap in your attic floor where heated or cooled air escapes from your living space - most jobs on a single-family home are done in one day, with before-and-after testing included. These gaps sit around light fixtures, plumbing pipes, electrical wires, and the tops of interior walls. They are invisible from below, but together they can account for a significant share of your home's total heat loss. The U.S. Department of Energy estimates that sealing air leaks can cut heating and cooling costs by up to 20 percent for a typical home.
Most Twin Falls homeowners discover that insulation alone was not enough. Insulation slows heat from moving through solid material, but it does almost nothing to stop air from flowing freely through openings. Air sealing closes those openings first, so whatever insulation you have can finally do its job. Many homeowners who add retrofit insulation to the attic get the best results when they combine it with air sealing in the same project - the two steps work together in a way that neither alone can match.
Homes built in Twin Falls before about 1990 were constructed without modern air sealing practices. The attic floor was simply left open around every pipe, wire, and wall top, and those gaps have been losing energy every month since the house was built. If yours is from that era, a single day of attic air sealing can deliver a more immediate impact on comfort and energy bills than most other single upgrades available.
Twin Falls winters push January temperatures into the single digits, and a leaky attic forces your furnace to replace heat that is constantly escaping upward. If your gas or electric bill climbs sharply from November through February with no change in habits, air escaping through attic gaps is one of the most common causes. The longer it goes unaddressed, the more you spend each heating season.
Twin Falls sits on an open high-desert plain and sees persistent wind, especially in spring and fall. Wind pressure actively pushes outdoor air through attic bypasses and down into your living space. If you feel a chill near recessed lights, ceiling fans, or upstairs outlets when the wind picks up, that is air moving through gaps in your attic floor - not a quirk of your house.
Many homeowners assume that visible attic insulation means the job is done. But insulation slows heat from moving through solid material - it does almost nothing to stop air from flowing through gaps. If your home still feels uneven or drafty despite having insulation overhead, the missing piece is almost always air sealing, not more insulation.
If you peek into your attic and notice dirty-looking patches or dark streaks on the insulation near wall tops or around ceiling fixtures, that discoloration is caused by airflow carrying dust through those spots over years. It is one of the most visible physical signs that air sealing work is overdue, and it marks exactly where the leaks are.
We provide comprehensive attic air sealing that covers every gap in your attic floor - wall tops, pipe penetrations, wire chases, attic hatches, and recessed light fixtures. Every job starts with a blower door diagnostic that measures exactly how much air is escaping from your home before work begins. The crew then moves systematically through the attic, applying spray foam, caulk, or rigid blocking to seal each opening. A second blower door test at the end gives you a measurable result, not just a contractor's promise.
Attic air sealing pairs naturally with whole-home air sealing for homeowners who want to address every part of the building envelope in one visit. We can also assess your attic insulation levels at the same time and recommend whether adding blown-in material on top of the sealed attic floor would further improve your home's performance. Every project includes a written estimate that lays out the full scope and cost before any work begins.
Comprehensive sealing of every gap in your attic floor - wall tops, pipe penetrations, wire chases, recessed lights, and the attic hatch.
Before-and-after diagnostic testing that gives you a real, measurable number showing how much tighter your home is when the work is complete.
Targets one of the most common and overlooked leak points in homes built before 2000, where open-air recessed fixtures connect your ceiling directly to the attic.
Seals the pull-down stair or access panel that is often completely ungasketed in older Twin Falls homes, letting conditioned air escape freely.
Twin Falls sits at roughly 3,700 feet on the Snake River Plain and sees a genuinely demanding climate. January lows regularly drop into the single digits, and summer temperatures push into the high 90s. That wide swing means your heating and cooling systems are working hard for most of the year - and an unsealed attic makes both seasons worse. In winter, warm air escapes upward through gaps before it can heat your living space. In summer, attic heat pushes down through the same openings and forces your air conditioner to run longer. The Snake River Plain also sees persistent wind with few natural breaks, and wind pressure actively drives outdoor air through attic bypasses into your home. For Kimberly and Filer homeowners on the open plain, this wind factor is especially significant.
A large share of Twin Falls homes were built in the 1960s through 1980s, when air sealing was not a standard construction practice. Builders simply did not think about sealing around pipes, wires, and wall tops in the attic. If your home is from that era, the gaps that have been slowly draining energy every month have never been addressed. The good news is that homes from this period respond well to air sealing - the improvement in comfort and energy costs is often dramatic because the starting point is so leaky. Idaho Power serves most of Twin Falls and has offered rebate programs for qualifying air sealing improvements, which can meaningfully reduce the upfront cost of the project.
Let us know your home's age, approximate size, and what you have been noticing - high bills, cold spots, drafts near the ceiling. We reply within 1 business day and schedule an in-home visit, typically within a few days of your call. No pressure, no commitment required.
A technician inspects the attic in person - checking existing insulation, locating visible gaps, and running a blower door test to quantify how much air is escaping. The test takes about 30 minutes and gives us a real number to work from. You get a written estimate with a full scope of work before anything begins.
The crew works from inside the attic applying spray foam, caulk, or rigid blocking to every gap they find - around pipes, wires, wall tops, and ceiling fixtures. The work is methodical and takes most of a day for a typical home. Your living space stays clean and undisturbed throughout.
After sealing, we run the blower door test again and compare results to the baseline. You see a measurable improvement in plain numbers. If you are applying for an Idaho Power rebate or a federal tax credit, we provide the documentation you need at this step so you do not have to chase it later.
Free estimate, no pressure. We will inspect your attic and give you a clear written quote - including what Idaho Power rebates may apply to your project.
(208) 544-9799We run a blower door test before and after every attic air sealing job. You receive a real number showing exactly how much tighter your home is when we are done - not just a contractor's word for it. That accountability is part of how we work, not an add-on.
Idaho requires insulation and weatherization contractors to hold a valid state license through the Division of Building Safety. Every job we complete in Twin Falls is performed by a licensed, insured contractor. You can verify any contractor's license status directly through the state.
We are familiar with Idaho Power's current rebate programs and help you capture available savings before they run out. Rebate funds are limited each year, and the documentation has to be done correctly from the start. We handle that process with you so nothing slips through.
We serve Twin Falls, Jerome, Burley, Kimberly, Filer, Gooding, Wendell, and the surrounding region. When you call, you reach someone local who knows the housing stock - from the older neighborhoods near CSI to the newer subdivisions on the north side of town.
The combination of before-and-after testing, Idaho licensing, and local rebate knowledge means you know exactly what you are getting before the job starts and exactly what was accomplished when it ends. That kind of accountability is rare in this trade - and it is the standard we hold every attic air sealing job to. ENERGY STAR and the Building Performance Institute both recognize blower door testing as the standard for verifying air sealing quality - we follow those standards on every project.
Add insulation to your existing attic, walls, or crawl space without a major renovation - the natural follow-up to attic air sealing.
Learn moreA whole-home air sealing treatment that extends beyond the attic to rim joists, crawl spaces, and every major penetration in your building envelope.
Learn moreEvery month without sealing is money lost through your ceiling - call now or submit a request online and we will get back to you within 1 business day.