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Serving San Luis Obispo, CA and surrounding areas. (805) 329-7188
Hidden gaps in your attic floor let conditioned air escape all year long. We find every leak, seal it properly, and leave you with a home that actually holds its temperature.
Attic air sealing in San Luis Obispo means finding and plugging every gap, crack, and penetration in the attic floor so conditioned air stops escaping and outside air stops getting in - most jobs on a standard single-story home are completed in one day with no disruption to your living space.
The gaps are not always obvious. They hide around recessed light fixtures, pipe and wire penetrations, the tops of interior walls, and the attic hatch itself. In San Luis Obispo, where a large share of the housing stock was built in the 1950s through 1980s without any air sealing, these openings have often been there since the day the house was built. If your home has never been assessed, there is a strong chance the attic has significant leakage you cannot see.
Attic air sealing is often the first step before adding retrofit insulation. Sealing first means any insulation added on top performs at its full rated value - skipping this step is the most common reason insulation upgrades underperform.
San Luis Obispo's weather is temperate enough that a well-sealed home should not need constant heating or cooling. If your monthly gas or electric bill consistently surprises you, air leaking through the attic floor is one of the most common culprits. A leaky attic forces your system to run far more than the climate actually demands.
When air moves freely between your attic and your living space, temperature balance breaks down. You might notice one room that runs warmer than the rest, or a draft near a ceiling light fixture on a still day. Both are signs that air is moving through gaps between your attic and living area - gaps that sealing will close.
A large share of San Luis Obispo's older neighborhoods - including many homes near downtown and in the Laguna Lake area - were built without any air sealing at all. If you have never had a professional assess your attic's air barrier, the odds are good that significant gaps have been there since the house was built.
When air is pulled through gaps in the attic floor, it carries dust and particles from the attic space into your rooms. If ceiling fan blades, recessed lights, or the area around vents get dusty faster than you would expect, that is often air - and everything it carries - moving through openings that should be sealed.
We work through the attic systematically - not just the obvious spots. Every pipe and wire penetration gets sealed, every recessed light fixture gets addressed, and the tops of interior walls (the most commonly missed area) are closed off with foam or rigid blocking. For homes where the attic floor has existing insulation, we move what is needed to reach the penetrations, seal them properly, and replace the insulation when done. When the job is finished, you will know exactly what was sealed and where.
For many San Luis Obispo homes, attic air sealing is best paired with whole-home air sealing services that address the crawl space and wall penetrations at the same time. If your attic also needs more depth, we can follow up with a retrofit insulation installation once the air barrier is in place - doing both in the right order gives you the full benefit of each.
Best for most SLO homes - closes every penetration in the attic floor before or after insulation is added.
Ideal for homes with older can lights that open directly into the attic and create a direct pathway for air loss.
Addresses the top of interior walls - the single most commonly missed location in older homes without proper air barriers.
For homes where the hatch is a significant source of air leakage, especially in older homes with original wood-framed hatches.
SLO sits in a Mediterranean climate where summer afternoons can push into the 90s while coastal fog keeps mornings cool, and winter nights regularly dip into the 40s. That daily temperature swing is exactly the condition where a leaky attic quietly drains energy all year - your heating or cooling system is constantly playing catch-up. Homeowners here often underestimate their energy loss because the climate never feels extreme, but the bills tell a different story. A significant share of the city's housing was built before California adopted its current energy efficiency standards, and homes of that era were rarely air sealed at all. The U.S. Department of Energy identifies attic air leakage as one of the largest single sources of energy loss in a home, and older SLO homes tend to be on the leaky end of the spectrum.
SoCalGas - which serves San Luis Obispo for natural gas - offers rebate programs for qualifying home energy improvements including attic air sealing, which can reduce your net cost meaningfully. We also serve homeowners in Paso Robles and Atascadero, where the same older housing stock and wide daily temperature swings create similar air sealing needs. The approach is the same: assess the attic, seal every penetration, and leave you with documentation of what was done.
Call or submit a request online and we will reply within one business day. We will ask a few questions about your home's age and whether you have had any prior insulation work, so we come prepared with the right materials and a realistic estimate.
A technician visits your home, accesses the attic, and assesses what they are working with - existing insulation, visible penetrations, and ventilation. You receive a written estimate that breaks down exactly what will be done and why, before you agree to anything.
The crew works through the attic systematically - foam, caulk, or rigid blocking at every gap they find. This is detailed work and a thorough job on an average SLO home typically takes most of a day. Your living space is not disrupted and you can be home throughout.
Once sealing is complete, the contractor does a final walkthrough and replaces any insulation that was temporarily moved. Before they leave, they provide the written documentation you need to submit a SoCalGas rebate claim if the project qualifies.
Free written estimate. SoCalGas rebate documentation included. No pressure to decide on the spot.
(805) 329-7188Most missed locations in attic air sealing are the tops of interior walls and the areas around recessed lights. We work from a consistent checklist of locations on every job so nothing gets skipped. You can ask to see that list before the work begins.
San Luis Obispo has hundreds of homes built in the 1950s through 1980s that have never been air sealed. We have worked in this type of construction enough to know where the gaps hide and what materials hold up in this climate's humidity swings.
San Luis Obispo is served by SoCalGas, and qualifying air sealing work can be eligible for rebates. We provide the documentation you need to submit a claim so you are not navigating the paperwork alone. According to the Building Performance Institute, certified contractors are trained to document improvements to the standard required for rebate eligibility.
Every job starts with a written estimate after we have actually seen your attic - not a phone quote based on square footage alone. You know exactly what is being done, why, and what it costs before we pick up a can of foam.
Attic air sealing is one of the few home improvements you do once and benefit from for decades. We treat it that way - methodical, documented, and done to a standard we are willing to stand behind.
Add insulation to your existing home without tearing out walls - ideal when air sealing reveals under-insulated areas.
Learn moreWhole-home air sealing that addresses every leakage zone from the crawl space to the attic in one visit.
Learn moreMost jobs are finished in a single day - call now to get on the schedule before the next season arrives.