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Serving San Luis Obispo, CA and surrounding areas. (805) 329-7188
Air leaks in your attic, crawl space, and walls can account for a large share of your energy bill. We find the gaps, seal them, and test before and after so you can see the improvement in numbers.
Air sealing services in San Luis Obispo locate and close the hidden gaps, cracks, and penetrations where conditioned air escapes and outside air sneaks in - most residential jobs are completed in a single day with workers operating primarily in the attic and crawl space.
San Luis Obispo sits in a Mediterranean climate with temperature swings of 20 to 30 degrees between afternoon and evening. A leaky home fights that swing constantly, and older SLO homes - especially those built before 1990 - were constructed without the air sealing practices that are standard today. If your home has also had additions, converted spaces, or rental-era modifications, the chances of significant hidden gaps are even higher.
Air sealing works best when paired with proper insulation. If you are also considering basement insulation, combining both services in a single visit is usually the most cost-effective approach and gives the strongest improvement to your home's overall comfort.
A cool breeze near your baseboards, around electrical outlets on exterior walls, or in the corner of a room on a windy day is outside air coming in through gaps in your home's structure. In San Luis Obispo, the afternoon marine layer and evening winds off the Pacific make these drafts especially noticeable in spring and fall.
San Luis Obispo's weather is genuinely mild compared to most of California, so if your heating or cooling bills feel too high, air leakage is often the culprit. A home that cannot hold its temperature forces your HVAC system to run longer and more often than it should. If neighbors in similar-sized homes are paying noticeably less, it is worth having someone assess how much air your home is losing.
If one bedroom is always stuffy in summer while another is cold in winter, uneven air leakage is a likely cause. Gaps in the attic above certain rooms, or missing sealing around a particular wall penetration, create hot and cold spots that no amount of thermostat adjustment will fix. Air sealing addresses the root cause.
Many San Luis Obispo homes near Cal Poly have been modified over the years - added walls, new plumbing runs, converted garages - in ways that left hidden gaps. Every time a wall was opened and closed, or a pipe was run through a floor, there was an opportunity for a gap to be left unsealed. The age and history of the home is often enough reason to have it assessed.
We approach air sealing as a whole-home assessment, not a spot treatment. Using foam, caulk, and weatherstripping, we seal the most common problem areas: attic floors, crawl space ceilings, around recessed light fixtures, and wherever pipes or wires pass through walls and floors. For the attic specifically, we offer targeted attic air sealing as a standalone service - since the attic floor is often the single biggest source of leakage in an older SLO home, it is sometimes the highest-return place to start.
For homes with unfinished or underinsulated lower levels, combining air sealing with basement insulation addresses both the thermal layer and the air barrier at the same time. We use a blower door test before and after every job so you have a real number showing exactly how much improvement was made - not just a contractor's promise.
Best for older homes where multiple penetration points are leaking across the attic, walls, and crawl space.
Targeted for homeowners whose biggest comfort complaints are in rooms directly below the attic.
Ideal for homes with cold floors in winter or moisture problems under the subfloor.
Designed for homes that have had additions, conversions, or informal modifications leaving hidden gaps behind.
SLO's daily temperature swings - sometimes 30 degrees between afternoon and evening - mean your home is constantly working to hold a stable temperature. A large share of the city's housing was built in the 1950s through 1980s without air sealing practices, and decades of settling, remodeling, and deferred maintenance have added more gaps over time. Homes near Cal Poly have an added wrinkle: many were converted, subdivided, or informally modified over the years to accommodate rental use, leaving hidden penetrations through floors and ceilings that were never properly sealed. The U.S. Department of Energy estimates air leaks account for a significant share of heating and cooling energy in a typical home - and SLO homes in this age range tend to be on the leakier end of the spectrum.
PG&E, which serves most of San Luis Obispo, offers rebates for qualifying air sealing work. We also serve homeowners in Morro Bay and Atascadero, where older housing stock and different microclimates create their own air sealing challenges. Whether coastal moisture is the concern or wide inland temperature swings, the same systematic approach applies.
We ask a few basic questions about your home's age, size, and what is prompting your interest. Most callbacks happen the same day. No commitment required to schedule a visit.
A contractor walks through your attic, crawl space, and utility areas and may use a blower door test to measure exactly how much air your home is losing before any work starts. This one- to two-hour visit gives you a real picture of the problem - not a guess.
On the work day, the crew uses foam, caulk, and weatherstripping to close the gaps identified during the assessment. Workers spend most of their time in areas you rarely go - attic and crawl space - with minimal disruption to living spaces.
After sealing is complete, we run the blower door test again. We share the before-and-after numbers with you so you can see exactly what changed. Your home is fully usable when the crew leaves - no curing period required.
We measure before and after every job so you know exactly what improved - no guessing, no vague promises.
(805) 329-7188We measure your home's air leakage before we start and again when we finish. You leave with a real number showing the improvement - not just a contractor's assurance that the work was done well. This is the standard that the Building Performance Institute recommends for professional air sealing work.
Homes near Cal Poly with a history of rental use or informal renovation often have gaps that a standard attic-and-crawl-space checklist misses. We factor your home's full history into the assessment and check the areas where those modifications were made, not just the obvious spots.
PG&E offers rebates for qualifying energy efficiency work in San Luis Obispo, but the documentation and eligibility requirements are easy to get wrong. We know the process and provide the paperwork you need to claim any available incentive - so you get the savings without the back-and-forth.
We are a licensed contractor serving San Luis Obispo County homeowners, not a regional franchise sending out unfamiliar crews. Our team knows the housing stock in this area - the stucco construction, the older framing, the crawl space configurations common in SLO neighborhoods - and that local knowledge shows up in the quality of the work.
Every air sealing job we do is documented from start to finish. You know what we found, what we sealed, and exactly how much your home improved - before we send an invoice.
For guidance on air sealing techniques and standards, the U.S. Department of Energy and Building Performance Institute are reliable references for understanding what good work looks like.
Insulate and seal your basement or subfloor to stop cold air from rising into living spaces.
Learn moreTargeted sealing of the attic floor - the single biggest source of air leakage in most SLO homes.
Learn moreMost San Luis Obispo air sealing jobs are done in a single day - contact us now and get a free estimate with before-and-after testing included.