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Serving Rapid City, SD and surrounding areas. (605) 646-9056
Your furnace is losing the battle with gaps you cannot see. Air sealing closes those leaks in your attic, crawl space, and walls so your home holds its temperature through Rapid City winters - and you stop paying to heat the outdoors.
Air sealing services in Rapid City find and close the hidden gaps in your home where outside air gets in and conditioned air escapes - most jobs on a single-family home are complete in one full day. These gaps are not visible during a regular walkthrough. They hide in the attic floor, around electrical boxes on exterior walls, where pipes pass through framing, and along the rim joists at the top of your foundation. Contractors use a blower door test to pressurize the home and expose every leak, then seal them with foam, caulk, or weatherstripping.
Air sealing is one of the most cost-effective energy upgrades available to Rapid City homeowners. It addresses a problem that insulation alone cannot fully solve - because even the best insulation cannot stop air movement through gaps in your home's frame. For that reason, we often combine air sealing with basement insulation or attic work when we are already inside those spaces, since treating them together in one visit produces better results than scheduling separately.
The work happens in spaces you rarely visit - the attic, the crawl space, the perimeter of the basement - and it does not require any disruptive demolition. Most homeowners can stay home during the job, and the results are noticeable from the first heating or cooling cycle after the work is done.
Rapid City homeowners are familiar with the way chinook winds arrive suddenly and push air pressure against the sides of homes. If your furnace runs almost constantly during windy stretches - even when temperatures outside are not that extreme - wind pressure is likely forcing outside air through gaps in your home's frame. Air sealing reduces how much those pressure changes affect your indoor temperature.
If one bedroom is always noticeably colder than the rest of the house in winter, or one room feels stuffy and warm in summer no matter what you do with the vents, uneven air leakage is often the cause. Leaky areas let conditioned air escape and outside air enter unevenly, creating temperature differences that your heating and cooling system cannot fully compensate for.
Homes built in Rapid City before 1980 were built before modern energy codes existed and were never designed to be airtight. Decades of settling, wood shrinkage, and repeated freeze-thaw cycles in the Black Hills climate have likely opened up additional gaps over time. If your home has never had an energy audit or air sealing work done, there is a strong chance you are losing significant amounts of heated and cooled air every day.
If you notice frost forming on the inside of your attic hatch in winter, or condensation on interior walls near the ceiling, warm moist air from inside your home is escaping into cold spaces where it does not belong. Left unaddressed, that air leakage can lead to moisture damage and ice dams at your roofline over time - a much more expensive repair than the air sealing that would have prevented it.
Rapid City Insulation Company performs whole-home air sealing that covers the areas responsible for the most air movement: the attic floor and attic hatch, the rim joists along the top of your foundation walls, plumbing and electrical penetrations throughout the home, and the crawl space perimeter. We use a blower door test before the work begins to establish a baseline measurement of your home's air leakage, and many jobs include a follow-up test after the work is complete so you can see the improvement in actual numbers. When gaps are found around recessed lights or HVAC ducts, we address those as part of the same job.
Air sealing is most effective when it is paired with insulation in the same spaces. If your attic floor has gaps that need sealing, adding insulation over the sealed areas while we are already up there produces a significantly better outcome than addressing each layer on separate visits. We also offer attic air sealing as a focused service for homeowners whose primary concern is heat loss and moisture movement through the attic plane specifically. For homes where the basement perimeter is a major source of leakage, basement insulation and rim joist sealing can be combined in the same visit.
Comprehensive treatment covering attic, rim joists, crawl space, and penetrations - best for homes that have never had energy work done.
Before-and-after measurement of your home's air leakage rate so you can see the actual improvement in numbers.
Focused sealing of the attic floor plane - effective as a standalone service for homes where the attic is the primary leak source.
Targets the framing at the top of your foundation walls - one of the most overlooked and most impactful areas in Rapid City homes.
Rapid City sits at the eastern edge of the Black Hills and experiences some of the most dramatic temperature swings in the country. Winter lows regularly drop below zero, summer highs can push past 100 degrees, and chinook winds can shift temperatures by 40 degrees or more in a single afternoon. Every gap in your home's shell is working against you in both directions - not just in winter - which makes air sealing a year-round return on investment, not a seasonal fix. Many of Rapid City's established neighborhoods contain homes built in the 1950s through 1970s, before modern energy codes existed. Those homes were never designed to be airtight, and decades of freeze-thaw cycling in the Black Hills climate have opened up additional gaps that were not there when the home was built. The ENERGY STAR Seal and Insulate program and federal tax credits through the 25C energy efficiency tax credit can help offset the cost for qualifying homeowners.
Black Hills Energy, the primary utility serving Rapid City, also offers rebates for qualifying air sealing and insulation work - and the rebate amounts and eligibility rules can change from year to year, which is why getting work done sooner rather than later makes financial sense. We serve homeowners throughout the Black Hills region, including Sturgis and Spearfish, where homes share the same mid-century construction characteristics and face the same Black Hills climate conditions as Rapid City.
We ask a few basic questions: the age of your home, whether you have an accessible attic and crawl space, and what is prompting the call - drafts, high bills, or something else. We respond within one business day and schedule a free in-home assessment at your convenience.
A technician walks through your home - including the attic, basement or crawl space, and living areas - to identify where air is leaking. Many assessments include a blower door test, which depressurizes the house and makes every leak easy to detect. This step usually takes one to two hours.
You receive a written estimate outlining exactly which areas will be addressed and the total cost - with no surprises on installation day. We also confirm at this point whether your project qualifies for Black Hills Energy rebates and what documentation you will need after the work is complete.
The crew works methodically through the attic, rim joists, crawl space, and penetrations identified in the assessment. Most jobs are complete in one full day. Before we leave, we walk through what was done and provide any paperwork needed for rebate or tax credit filings.
Free in-home assessment. Written estimate. We respond within one business day.
(605) 646-9056A contractor who skips the blower door test and just sprays foam in obvious spots is not doing a complete job. We use blower door testing to find every leak and, when the job is done, to show you the measurable improvement. You are not taking our word for it - you can see the before-and-after numbers. The Building Performance Institute sets the standards for this kind of testing, and we follow them.
The majority of air sealing work we do in Rapid City is on homes built between the 1940s and 1970s - homes where air leakage was never addressed because the concept simply was not part of construction at the time. We know what those homes look like on the inside, where the gaps typically are, and how to address them efficiently without causing disruption to the rest of the house.
Rebates for air sealing and insulation work are available from Black Hills Energy right now, but the documentation requirements are specific, and many homeowners lose out by not capturing the paperwork on the day of the job. We walk through the rebate process with you before work begins, confirm eligibility, and make sure you leave with everything you need to file your claim before the program details change.
Sealing a home tightly means ventilation needs to become intentional rather than accidental. If your home has gas appliances, a wood-burning fireplace, or a tight crawl space, those situations require assessment before and after sealing. We include this check as a standard part of every air sealing job - not as an add-on - so you never end up with a tighter home that also has an unaddressed ventilation concern.
Air sealing is one of the few home improvements that pays for itself over time through lower energy bills while also making your home more comfortable every single day. We build our work to last so you do not have to revisit it.
Focused sealing of the attic floor plane - where heat loss and moisture movement are most concentrated in Rapid City homes.
Learn moreCombine rim joist air sealing with basement wall insulation in one visit to address the perimeter of your home's foundation in a single project.
Learn moreGet a free written estimate this week and lock in your fall schedule before slots fill up. One call gets you on the calendar.