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Serving Rochester, MN and surrounding areas. (507) 738-1270
Drafty rooms, ice dams, and climbing heating bills often come from air leaks you've never seen. We find them all, seal them, and test the results.
Air sealing services in Rochester find and plug the gaps, cracks, and penetrations where outside air sneaks into your home and conditioned air leaks out, most jobs for a single-family home are completed in one full day including before-and-after blower door testing to verify the results.
Insulation slows heat transfer, but it doesn't stop air movement. Gaps around electrical outlets on exterior walls, where pipes and wires pass through framing, and along the tops of interior walls in the attic floor let outside air bypass your insulation entirely. Rochester's extreme winter temperatures mean those gaps cost you real money every month from November through March. Many homes that have had attic air sealing done separately still have significant leakage at the basement rim joists and in wall cavities.
A thorough air sealing job starts with a diagnostic blower door test so we know exactly where your home is losing air before we touch anything. Call (507) 738-1270 or use the contact form to schedule an assessment.
Four signs Rochester homeowners commonly notice before they have this work done.
If your gas or electric bill climbs sharply from November through March and never reflects what neighbors with similar homes pay, air leakage is one of the most common causes. Rochester winters are long enough that even moderate leakage adds up to real money over a heating season.
Hold your hand near an electrical outlet on an exterior wall on a cold day. If you feel cool air moving, that outlet is connected to a gap that runs to the outside. Drafts near baseboards, window frames, or where walls meet the ceiling are direct signs of air leakage you can detect without any equipment.
Thick ridges of ice building up along the edge of your roof after snowfall are a strong signal that warm air is escaping through your attic floor and heating the roof unevenly. This is a very common problem in Rochester given the freeze-thaw cycles from November through March, and it's one that attic air sealing directly addresses.
If one bedroom is always cold in winter or a corner of the house never warms up, that unevenness often points to localized air leakage rather than a heating system problem. Older Rochester homes with additions or converted spaces are especially prone to this because transitions between original and added construction tend to have more gaps.
A complete air sealing job covers the three zones where homes leak the most: the attic floor, the basement rim joists, and the wall penetrations throughout the house. We start with a blower door test, then work methodically through each zone using a combination of spray foam, caulk, and rigid foam depending on the size and type of gap. Every job ends with a second blower door test so you have a real number showing the improvement.
The biggest leakage in most Rochester homes is in the attic floor, where gaps around light fixtures, plumbing stacks, and the tops of interior walls let warm air escape directly into the attic. Our dedicated attic air sealing service addresses those areas specifically. For homes that need both sealing and thermal protection, we frequently pair air sealing with basement insulation so the rim joist and foundation walls are handled together.
Air sealing and insulation work best as a package. Insulation slows heat transfer through materials; air sealing stops air from bypassing those materials entirely through gaps. The U.S. Department of Energy notes that air leakage accounts for 25 to 40 percent of the energy used for heating and cooling in a typical home. In Rochester's climate, addressing that waste is one of the highest-return improvements you can make.
Measures exactly how much air your home leaks before and after sealing, giving you a real number that proves the work was done well.
Targets the top-plate gaps, plumbing and electrical penetrations, and recessed light openings where the most heat escapes in Rochester homes.
Closes the gap where your home's framing meets the foundation, one of the highest-leakage zones in older Rochester homes.
Rochester regularly sees temperatures drop below zero from January through February, with the temperature difference between indoors and outdoors sometimes exceeding 60 degrees. At that differential, even small gaps become significant pathways for heat to escape. Air leakage that would be a minor nuisance in a moderate climate becomes a major energy cost in Rochester. The city's older neighborhoods, including the IBM-era homes in the southeast and the pre-war properties near downtown, were built before modern energy codes and typically have dozens of unsealed penetrations that have never been addressed.
Ice dams are one of the most visible signs of the problem. Rochester homeowners watch them form every winter along rooflines after heavy snow, and they're a direct symptom of warm air escaping through the attic floor. The freeze-thaw cycles the city experiences from November through March mean those ice dams form repeatedly each season. Sealing the attic air leaks is the fix that stops the cycle at the source. Rochester Public Utilities has offered rebates for this type of work through state energy efficiency programs, and it is worth checking before you schedule.
We serve homeowners throughout the region, including those in Faribault, Northfield, and Owatonna. Every community in this region faces the same cold winters, and we bring the same diagnostic approach and testing standards to every job we do.
A predictable process from first contact to a measurably tighter home.
Call or submit a request and we'll reply within one business day. We'll ask about your home's age, any comfort problems you've noticed, and whether you've had energy work done before — so we arrive prepared.
We run a blower door test that temporarily depressurizes your home, making air leaks detectable. This test takes about an hour and gives us a clear, objective picture of how leaky your home is and where the biggest problems are.
You receive a written quote covering scope, materials, and cost before any work is scheduled. This is the right moment to ask about rebates through Rochester Public Utilities and whether permits apply to your job.
The crew seals gaps using spray foam, caulk, and rigid foam starting in the attic and moving to the basement. Once complete, we run the blower door test again and show you the before-and-after numbers so you can see exactly what improved.
Free diagnostic assessment. Written quote before work begins. Before-and-after testing included. We reply within one business day.
(507) 738-1270We run a blower door test before we start and again when we finish. You get a real number showing how much your home improved — not a verbal assurance. That measurement is the difference between knowing the work was done and guessing.
We work on Rochester's full range of housing stock, from IBM-era ranches in the southeast to older Craftsman homes near downtown. Rochester Public Utilities serves this area, and we can help you navigate available rebate programs before you commit.
Rochester homeowners deal with ice dams regularly during the city's freeze-thaw cycles. We seal the attic floor penetrations that allow warm air to heat the roof unevenly — the fix that actually works, not the workarounds.
Minnesota requires insulation and air sealing contractors to hold a valid state license. We carry ours on every project and leave you with written documentation of what was sealed, where, and what the test results showed.
Every air sealing project we complete includes a blower door test at the start and at the end. That's not a standard practice everywhere, but it's the only honest way to know whether the job made a real difference. We do it because Rochester homeowners deserve to see the result, not just take our word for it. The Building Performance Institute sets standards for this type of diagnostic work, and we follow them on every job.
Insulating basement walls and rim joists alongside air sealing gives you a complete thermal barrier at the lowest level of your home.
Learn moreFocused attic-floor sealing targets the penetrations where the most heat escapes in Rochester homes and stops ice dams from forming.
Learn moreSpots fill up fast in September and October — lock in your date now and head into the cold season with a tighter, warmer home.