Attic Air Sealing
Focused sealing of the attic floor, where most homes lose the most air, paired with attic insulation for maximum impact.
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Hidden gaps in your home's envelope let desert heat pour in all summer and drain your AC around the clock. We find and seal those leaks so your insulation can finally do its job.
Air sealing in Las Cruces means finding and closing the small gaps, cracks, and openings where outside air sneaks in and your conditioned air leaks out, most jobs on a single-family home take between four and eight hours and produce measurable results you can see in before-and-after test numbers.
Insulation slows heat transfer through solid materials, but it cannot stop air from flowing through gaps. In a home with air leaks, hot desert air bypasses your insulation entirely, entering through openings around electrical outlets, attic hatches, recessed lights, and plumbing penetrations. Your AC works overtime to compensate, and the rooms farthest from the thermostat never quite reach the set temperature.
Air sealing and attic air sealing work together as a system. Sealing the attic floor stops the biggest leaks in most homes, while whole-home air sealing addresses every remaining gap in the envelope. Pairing both with basement insulation or wall insulation gives you a fully sealed and insulated building envelope.
These warning signs are ones Las Cruces homeowners can spot themselves before picking up the phone.
If your cooling costs jump sharply from May through September without any change in your habits, your home is likely working harder than it should. In Las Cruces, where summer temperatures regularly exceed 100 degrees, a leaky home forces your air conditioner to run almost constantly to compensate. That extra runtime shows up directly on your El Paso Electric bill every month.
If one bedroom or corner of your living room always feels warmer than the rest of the house, that area likely has more air leaks than others. This is especially common in Las Cruces homes with west- or south-facing rooms that take the full afternoon sun and have gaps around windows or in the ceiling above. The thermostat may read 76 degrees, but that room feels like 82.
Hold your hand near an electrical outlet on an exterior wall on a hot afternoon. If you feel warm air coming through, that outlet connects to the outside through gaps in the wall cavity. This is one of the most common and overlooked air leak locations in any home, and it is a check you can do yourself in five minutes without any tools.
Las Cruces sits at the edge of the Chihuahuan Desert, and dust infiltration is a real problem for homes with gaps in the envelope. If you are wiping surfaces every few days and still finding a thin layer of fine grit, outside air is finding its way in through cracks. Air sealing will not eliminate all dust, but it meaningfully reduces how much enters your home each day.
We start every air sealing job with a diagnostic step rather than guessing. A blower door test measures how much air is currently leaking out of your home and helps pinpoint where the biggest leaks are hiding. That data drives the work, so we are targeting the highest-impact areas first rather than applying foam and caulk at random.
The bulk of the sealing work happens in your attic and crawl space, where most homes have their largest leaks. Gaps around recessed light fixtures, attic hatch frames, plumbing and electrical penetrations, and wall top plates are sealed with foam or caulk. We also address attic air sealing as a dedicated scope if your attic is the primary source of infiltration, particularly in single-story Las Cruces ranch homes where the entire ceiling is directly below the attic.
After the work is complete, we run a second blower door test to confirm the home is measurably tighter than before. You get actual before-and-after numbers. We also discuss whether basement insulation or wall insulation would complement the sealing work, and we walk through ENERGY STAR's seal and insulate guidance to help you understand which upgrades will have the greatest impact for your specific home.
Best for homes where comfort problems or high bills affect multiple rooms or the entire house; includes diagnostic testing and sealing across all major leak locations.
Ideal for homes where the attic is the primary source of infiltration; focused scope that addresses the highest-impact leaks first and pairs naturally with attic insulation work.
Las Cruces regularly sees summer highs above 100 degrees, and air conditioning runs from late spring through early fall. That means any gap in your home's envelope is not just a minor inconvenience, it is a direct drain on your electric bill for five or six months straight. Air sealing has a faster payback here than in milder climates because the demand on your cooling system is so intense and so prolonged.
The Chihuahuan Desert also sends wind-driven dust, pollen from desert plants, and fine particulate matter through every gap it can find in your home's exterior. Homeowners in Las Cruces with allergies or respiratory sensitivities often find that air sealing makes a noticeable difference in how clean and breathable their indoor air feels, since the same gaps that admit hot air also admit desert dust. Homeowners in Sunland Park and El Paso face the same desert climate conditions and benefit from the same approach.
A significant share of Las Cruces homes were built with adobe or stucco-over-frame construction, which ages differently than wood-frame homes in wetter climates. Over time, the joints between adobe blocks, around window frames, and where stucco meets wood trim develop small cracks that let hot air in. These homes often benefit enormously from air sealing, but the work requires a contractor familiar with how these materials move and settle in the desert heat. The Building Performance Institute sets the training standards contractors should meet to do this work correctly.
Here is how the process works from your first call through to a verified, tighter home.
We reply within one business day. We will ask a few basic questions about your home's age, construction type, and which comfort or cost issues you have noticed so we can prepare for the assessment visit.
Before any work begins, we walk through your home and run a blower door test to measure your home's air leakage rate and pinpoint where the biggest gaps are. You do not need to prepare anything beyond giving us access to your attic hatch and any crawl space entry.
After the assessment, we present a written estimate that spells out what will be sealed, what materials will be used, and the total cost. This is also where we discuss whether the work qualifies for El Paso Electric rebates or federal tax credits, so you know the real out-of-pocket number before committing.
The crew seals the identified gaps, primarily in your attic and crawl space, in four to eight hours. We run a second blower door test when finished and share the before-and-after results with you directly so you can see exactly what improved. You can stay in your home throughout.
No obligation. We test your home first, show you the numbers, and give you a written quote before any work begins.
(575) 222-9399We run a blower door test before the work starts and again when it is done. You get actual before-and-after numbers so you can verify the job made a measurable difference, not just a promise that it did. That is a standard we hold ourselves to on every air sealing project.
We work throughout Las Cruces, El Paso, Sunland Park, and nine other communities across southern New Mexico and west Texas. That regional coverage means we have worked on the range of housing types in this area, from older adobe homes near downtown to newer stucco subdivisions on the east mesa.
Older adobe and stucco homes have different leak patterns than wood-frame construction, and the desert climate affects how sealing materials perform. We know where to look in Las Cruces homes and what materials hold up best in the heat and temperature swings of the Chihuahuan Desert.
We are licensed through the New Mexico Regulation and Licensing Department and familiar with El Paso Electric's rebate submission process. We help you understand what your project qualifies for before the work begins, not after the invoice is paid.
Air sealing is one of the highest-impact energy improvements you can make in a Las Cruces home, and the results are verifiable. We build that verification into every job so you are never taking our word for it.
Focused sealing of the attic floor, where most homes lose the most air, paired with attic insulation for maximum impact.
Learn moreInsulating basement walls and rim joists rounds out the building envelope after air sealing is complete.
Learn moreSchedule your free air sealing estimate now, before the cooling season arrives and every day of delay costs you money on your El Paso Electric bill.