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Insulation slows heat. Air sealing stops it. If your home has hidden gaps in the attic or walls, your AC is fighting hot air that sneaks past your insulation entirely. We find and close those gaps.
Air sealing services in San Jacinto find and close the hidden gaps, cracks, and openings where hot outdoor air sneaks into your home and conditioned air escapes - most jobs are complete in one day, starting with a blower door test that measures exactly how leaky your home is before any sealing begins. It is one of the most effective improvements you can make to a home in the San Jacinto Valley.
Most air leaks are not in obvious places like windows or doors. The biggest culprits are usually the attic floor, around recessed lights, and where pipes and wires pass through walls and ceilings. Homes built in San Jacinto before 2000 were constructed without today's air tightness requirements, which means large unsealed gaps in the attic are extremely common in this area. You may never have noticed them, but they have been letting in heat - and driving up your SCE bill - every summer since the house was built.
Air sealing and attic air sealing are different in scope: whole-home air sealing addresses gaps throughout the building envelope, while attic-focused work targets the most heat-intensive zone. We assess both and recommend the right approach based on what we actually find in your home, not a package you did not ask for.
If your air conditioner runs for long stretches but rooms stay stuffy and warm, hot outdoor air is likely finding its way in faster than your system can remove it. In San Jacinto's summer heat, this is one of the clearest signs of significant air leaks - usually in the attic or around recessed lights in the ceiling. The AC is not the problem; the building envelope is.
San Jacinto sits in a valley that gets hit by Santa Ana winds and general valley dust throughout the year. If you find yourself wiping down surfaces every few days, or notice fine grit settling on furniture after a windy stretch, uncontrolled air leaks are pulling that outdoor dust directly into your home through gaps you cannot see.
If your electricity bill jumps dramatically from May through September - well beyond what you would expect just from running the AC - air leaks are likely a major contributor. Every gap in your attic floor lets the extreme heat from that space pour down into your living areas, forcing your cooling system to work much harder than it should.
Walk from your living room to a back bedroom on a hot afternoon. If one room is noticeably hotter or stuffier than another, that room likely has more air leaks nearby - around electrical outlets on exterior walls, ceiling fixtures, or gaps in the attic above. Uneven temperatures throughout a home are a reliable sign that air is moving through the structure where it should not be.
Every job starts with a blower door test - a temporary fan mounted in your doorframe that depressurizes the house and reveals exactly where air is escaping. This is not guesswork. The test gives us a real number for how leaky your home is, and after we seal, we run it again to prove the improvement. We then work systematically through your attic and crawl space, applying foam and caulk to all identified gaps. For homes that also need basement insulation or crawl space work, we coordinate that alongside the sealing so you are not scheduling separate crews for related jobs.
Air sealing pairs directly with attic air sealing - the most heat-intensive zone in most San Jacinto homes. When we address both the attic-specific gaps and the broader building envelope in one project, the result is more effective than either task done separately. We handle rebate documentation as part of the job, so you have what you need for Southern California Edison programs and federal tax credits before we leave. The ENERGY STAR air sealing guidelines define the standard we follow on every job.
Best for any home before sealing begins - gives you an accurate before-and-after measurement of airtightness.
Best for pre-2000 San Jacinto homes where the attic is the primary source of heat infiltration into living spaces.
Best for homes with a raised foundation where cold or damp air enters from below during cooler months.
Best for homeowners who want a comprehensive improvement addressing all major leak points throughout the home.
San Jacinto summers are extreme. Temperatures regularly exceed 105 degrees, and that means the air trying to push into your home through gaps is not just warm - it is scorching. Every unsealed opening in your attic floor is a path for that air to pour directly into your living space, making it nearly impossible for your AC to keep up during the hottest parts of the afternoon. Homeowners in the valley deal with this all summer, and most never connect the problem to something that is fixable in a single day of work. The Santa Ana winds that roll through the Inland Empire each fall compound the problem, blowing dusty outdoor air through those same gaps and into your home.
A significant portion of San Jacinto homes were built in the 1970s through 1990s without any of the air tightness requirements that apply to construction today. Those homes have had decades of unsealed gaps letting heat and dust in. We serve homeowners throughout the valley, including Hemet and Perris, where the same combination of older housing stock, intense heat, and valley dust creates the same air infiltration problems we see every day in San Jacinto.
We ask a few basic questions about your home's age, comfort issues, and whether you have had any prior energy work done. We reply within 1 business day and schedule a free assessment visit - we do not quote air sealing by phone.
On assessment day, we run a blower door test that takes about an hour. You get a concrete number showing how leaky your home is - and we identify the highest-priority gaps so your money goes to work that actually makes a difference.
We walk you through what we found in plain language - where the biggest leaks are, what sealing them involves, and the total cost. This is also the time to discuss current rebates from Southern California Edison and SoCalGas.
The crew seals all identified gaps, then runs the blower door again. You get two numbers showing exactly how much tighter your home became. Before we leave, we provide the documentation you need for any rebate or tax credit applications.
We respond within 1 business day - no obligation to move forward. After you submit, someone from our office will call to schedule a free assessment at a time that works for you.
(951) 910-7091We run a blower door test before and after every air sealing job. That gives you two real measurements showing how much tighter your home became - not a promise, a documented result. If a contractor cannot show you those numbers, they are guessing.
We work throughout the San Jacinto Valley and the broader Inland Empire - 12 service areas in total. That means we know the housing stock here: which neighborhoods have the most common gap patterns and what to look for in homes from each era.
Our work follows standards set by recognized building performance organizations including the{' '}{' '}Building Performance Institute. That means a structured diagnostic process - not just spraying foam in likely spots and hoping for the best.
We provide the documentation you need for Southern California Edison rebates and federal tax credits before we leave. Most homeowners are eligible for meaningful incentives - we make sure you actually capture them, not just hear about them.
Every air sealing job we do ends with a real measurement, not a handshake. You will know exactly what your home tested at before we started and after we finished - and you will have the paperwork to show for it if you apply for rebates or sell your home.
Learn more about air sealing best practices from the U.S. Department of Energy Air Sealing guide. Federal tax credit information is available at ENERGY STAR Federal Tax Credits.
Seal and insulate below your living space to eliminate cold floors and uncontrolled moisture pathways from below.
Learn moreTarget the attic floor specifically - where most heat enters San Jacinto homes during triple-digit summer days.
Learn moreCall today or request a free estimate - we schedule blower door assessments quickly, and summer heat season is not waiting for you to get around to it.