Retrofit insulation
Add insulation to your existing home without tearing out walls - the natural next step after air sealing for maximum comfort and efficiency.
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Serving South Pasadena, CA and surrounding areas. (626) 517-0046
Gaps in your attic floor let superheated air push into your home all summer long. We find and seal every one of them so your air conditioner runs less and your SCE bill drops.
Attic air sealing in South Pasadena means finding and plugging the gaps, cracks, and openings in your attic floor that let conditioned air escape and hot outside air pour in - most jobs are completed in a single day and the work is done entirely from inside the attic.
South Pasadena sits in the San Gabriel Valley, where summer afternoons push attic temperatures well past 140 degrees. Every unsealed gap around a light fixture, plumbing pipe, or wall top lets that heat work directly against your cooling system. Attic air sealing is different from adding insulation - it stops air from physically moving through holes, while insulation slows heat transfer through solid materials. The two work best together, and if your home also needs thicker coverage overhead, pairing this work with our attic insulation service is the most effective combination.
If your home was built before 1980, as many South Pasadena properties were, your attic almost certainly has significant unsealed gaps - not because of poor construction, but because energy standards simply did not require them to be sealed at the time.
If rooms directly under the attic feel noticeably warmer than the rest of your home on a hot South Pasadena afternoon - even with the air conditioning running - hot attic air is likely pushing through gaps in your ceiling. This is one of the most common complaints from homeowners in older San Gabriel Valley properties. Waiting means your cooling system keeps fighting a losing battle all summer.
If you can smell wildfire smoke inside your home during a regional fire event even with windows and doors closed, it is finding its way in through gaps in your building envelope, and the attic is a common entry point. This is both an air quality concern and a clear signal your attic needs attention. South Pasadena homeowners who have had this work done report noticeably cleaner indoor air during smoke season.
If your SCE bill climbs dramatically from June through September even at reasonable thermostat settings, your cooling system may be working overtime to compensate for heat entering through attic gaps. In a poorly sealed home, the air conditioner can cycle almost continuously on a 95-degree day without ever fully winning. Comparing your usage to neighbors with similar homes can reveal whether your home is performing worse than it should.
If you find yourself cleaning ceiling fans, light fixtures, and the areas around recessed can lights more frequently than seems reasonable, air is moving through those fixtures from the attic above. In older South Pasadena homes, recessed lights from the 1970s and 1980s are often completely open to the attic. The dust is a visible sign of the air movement you cannot see - and a sign the gaps should be sealed.
Our technicians enter your attic and work systematically through every penetration - pipes, wires, ducts, recessed lights, and the tops of interior partition walls. We use a combination of spray foam and caulk depending on the size and type of gap. After sealing, many jobs include a blower door test to give you a before-and-after air leakage number, so you can see the improvement in concrete terms rather than just taking our word for it. For homes that also need better overhead coverage, we often pair this service with our air sealing services package, which addresses the full building envelope.
If your home has older wiring - knob-and-tube is still present in many pre-1950 South Pasadena properties - we will assess the situation before any foam is applied around those circuits and discuss the right approach with you. We also coordinate with the retrofit insulation work that often follows air sealing, since adding insulation on top of an unsealed attic is far less effective than doing both in the right order.
Best for homeowners who want to know exactly how much air is leaking before committing to work - we measure the problem first.
Best for homes showing signs of high heat gain, elevated summer bills, or smoke infiltration during regional fire events.
Best for homeowners who want documented, measurable proof that the work reduced air leakage - required for most rebate applications.
Best for South Pasadena homes where both sealing and insulation depth are inadequate - delivers the strongest energy and comfort improvement.
South Pasadena has a high concentration of homes built between 1900 and 1950 - Craftsman bungalows, Spanish Colonial Revival houses, and other period properties that predate modern energy codes by decades. These homes were built without any attention to air sealing, which means their attics are typically full of gaps that have never been addressed: around original plumbing stacks, older wiring chases, and balloon-framed wall cavities that open directly into the attic. The potential energy savings from this work are often larger in these homes than in newer construction, precisely because there is more to seal. California's Title 24 energy code applies to permitted renovation work, so if your project is part of a larger remodel, your contractor will coordinate with South Pasadena's Community Development Department. For standalone air sealing, permits are generally not required. Homeowners in Pasadena, CA face the same pre-war housing challenges.
Beyond energy costs, the San Gabriel Valley's wildfire smoke events have made attic air sealing a meaningful air quality investment for many South Pasadena families. Unsealed attics act as a direct pathway for particulates to enter the home during fire seasons. Southern California Edison serves this area and offers rebates for qualifying energy efficiency work - ask about current programs before your job begins, since they can meaningfully reduce your out-of-pocket cost. Neighbors in San Marino, CA share the same SCE service territory and access to the same rebate programs.
When you call or submit a form, we will ask a few quick questions - the age of your home, any symptoms you have noticed, and whether you have had energy work done before. We respond within one business day and schedule an in-home assessment before quoting anything.
A technician visits your home, inspects the attic, notes every penetration, and ideally runs a blower door test to measure how much air is leaking. This visit typically takes one to two hours and gives you a precise picture of what needs to be done and why.
After the assessment you receive a written estimate covering what will be sealed, what materials will be used, and the total cost. This is the right time to ask about SCE rebates, federal tax credits, and whether a post-job verification test is included. No pressure to sign quickly.
On the job day the crew works in the attic using foam and caulk to close every gap found during the assessment. Most standard jobs finish in one day. A thorough contractor follows up with a second blower door test and walks you through photos of the completed work before leaving.
Free assessment, written estimate, no obligation. We respond within one business day.
(626) 517-0046A large share of our work is in older Craftsman bungalows and Spanish Colonial Revival properties. We understand how balloon-framed walls, original plumbing stacks, and knob-and-tube wiring affect the approach, and we discuss any complicating factors with you before work begins.
We use blower door testing to give you a measurable number showing how much air leakage was reduced - not just a receipt and a handshake. That documentation also supports rebate applications with Southern California Edison and federal tax credit claims. See the Building Performance Institute for standards behind this testing approach.
Southern California Edison offers rebates for qualifying attic air sealing work, but they require proper documentation and in some cases a participating contractor. We walk you through what programs apply to your home before you sign anything, so you do not miss money you are entitled to.
We understand that South Pasadena homeowners care about indoor air quality during fire season, not just energy costs. Our sealing approach prioritizes the gaps most commonly exploited by outdoor smoke - attic hatches, recessed light fixtures, and wall-top openings - giving your family a meaningful layer of protection.
Every job we do in South Pasadena is treated as a long-term investment in the home, not a quick visit. We show our work, document the results, and stay available to answer questions after the job is done.
For more on air sealing and home energy efficiency, the U.S. Department of Energy and ENERGY STAR publish detailed guides on what to expect from professional air sealing work.
Add insulation to your existing home without tearing out walls - the natural next step after air sealing for maximum comfort and efficiency.
Learn MoreWhole-home air sealing that goes beyond the attic, addressing the full building envelope including crawl spaces and basement rim joists.
Learn MoreEvery month your attic goes unsealed, you are paying for cooling that disappears through the ceiling. Call today and get a written estimate within one business day.