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Serving Eureka, CA and surrounding areas. (707) 572-3718
Gaps in your home's shell let Eureka's damp coastal air in year-round. We find them, seal them, and prove it worked with a before-and-after blower door test.
Air sealing services in Eureka means finding every gap, crack, and opening in your home's outer shell and closing them so outside air cannot sneak in - most whole-home jobs are completed in one to two days and include blower door testing before and after to measure exactly how much improvement was achieved.
Eureka's coastal fog rolls off Humboldt Bay nearly every day of the year, and that moist air finds its way into homes through the same gaps that also let heat escape. The result is a home that never quite feels dry or comfortable no matter how long the heat runs. Air sealing addresses the actual cause rather than masking it. It also works best when paired with attic air sealing, which targets the largest single source of air leakage in most homes.
Homes built before 1980 - which represent a large share of Eureka's housing stock - were never built with air sealing in mind. Decades of settling, plumbing updates, and electrical work have added even more gaps over time. An assessment will tell you clearly where your home stands and what it will take to fix it.
Eureka's coastal fog is relentless, and if your home has significant air leaks, that moist outside air is constantly seeping in. A persistent musty smell, condensation on interior windows, or a general clamminess that does not go away even when the heat is on are all signs that air is moving through your home's shell in ways it should not be.
Eureka winters are mild compared to most of the country, so if your heating costs feel out of proportion to the actual temperatures, leaky air is likely the culprit. Heat escapes through gaps faster than most homeowners realize, and in a damp climate cold drafts feel worse than the thermometer suggests.
Hold your hand near an electrical outlet on an exterior wall on a cool foggy Eureka morning. A faint cool draft means outside air is moving through the wall cavity into your living space. The same test works near attic hatches, fireplace dampers, and the base of exterior walls - these are easy-to-spot signs that your home has gaps worth sealing.
If your upstairs bedrooms or the room directly below your attic are noticeably colder in winter or stuffier in summer than the rest of the house, warm air is escaping through the attic floor. In Eureka's damp climate this also means moisture is moving into the attic, which can lead to mold on the underside of the roof sheathing over time.
We start every job with a blower door test that measures your home's total air leakage before any work begins. This gives us a clear map of where the biggest gaps are and a baseline number we can compare against when the job is done. Most leaks cluster in the attic floor, around recessed lights, where plumbing and wiring pass through framing, and in the crawl space rim area - we work systematically through each zone using spray foam, caulk, and weatherstripping suited to each gap type. For homeowners who also want to address the attic specifically, attic air sealing can be done as a standalone service or combined with whole-home work for a more complete result.
After sealing, we run the blower door test again and share the before-and-after numbers with you directly. You will know exactly what changed - not because we say so, but because the test proves it. Many homeowners combine air sealing with basement insulation to address both the air barrier and the thermal barrier in the lowest part of the house in one visit. We will also walk you through any PG&E rebate paperwork before we leave so you do not have to figure that out on your own.
Best for older Eureka homes with multiple sources of air leakage - covers attic floor, crawl space, and wall penetrations in a single project with before-and-after testing.
Suited to homeowners who have identified specific problem areas and want focused work on the attic, crawl space rim, or a particular zone rather than a whole-home project.
Ideal for homeowners who want to understand how leaky their home is before committing to any work - the test provides a clear baseline and helps prioritize where sealing will make the biggest difference.
Designed for Eureka's Victorian and Craftsman homes where original finishes and historic character need to be preserved while still addressing the significant air leakage common in pre-1940 construction.
Eureka is one of the foggiest cities on the West Coast. Thick marine fog rolls in off the Pacific and Humboldt Bay for much of the year, and surfaces rarely get a chance to fully dry out between weather events. When a home has significant air leaks, that moisture-laden air moves through gaps in the shell continuously, raising indoor humidity, feeding mold, and contributing to the persistent damp feeling that many Eureka homeowners accept as unavoidable. It is not. Air sealing stops the moisture at the source. Homeowners in Bayside and Humboldt Hill face the same conditions and see the same improvement after sealing work is done right.
A large share of Eureka's homes were built before the 1970s, many in the Victorian and Craftsman eras that define the city's neighborhoods. Those homes were built without any thought given to air sealing - gaps around old plumbing chases, knob-and-tube wiring runs, and original wood framing are all common. Eureka's heating season also runs most of the year, so every bit of heat that escapes through those gaps costs money over a long, cool season rather than a short winter spike. Sealing those gaps pays off every month, not just in January.
The U.S. Department of Energy Energy Saver guide on air sealing and the Building Performance Institute both publish clear standards for what a properly executed air sealing job looks like, including what testing requirements should be met.
We reply within one business day. Tell us your home's age and what you have been noticing, and we will schedule an in-person visit with the right equipment. There is no cost to get a quote.
A technician visits, walks the attic and crawl space, and runs a blower door test to measure total air leakage and pinpoint the worst gaps. The test takes about an hour and causes no damage to your home.
You receive a clear written estimate and an explanation of what PG&E rebates may apply. A good contractor enrolls you in the right program before the work starts - not after - so you do not miss out on savings.
The crew seals attic, crawl space, and wall gaps systematically over one to two days. A second blower door test confirms the improvement. We share the before-and-after numbers with you before leaving.
Free estimate, no obligation. We test first, seal second, and prove the improvement with real numbers before we leave.
(707) 572-3718We measure your home's air leakage before we start and again when the work is done. You receive the actual numbers - not a contractor's word that things improved. This is the only way to know whether air sealing actually worked, and we make it standard on every job.
We have worked on Victorian, Craftsman, and other pre-war homes throughout Eureka and Humboldt County. We know where the hidden gaps live in older construction and how to seal them without disturbing original finishes, plaster walls, or historic trim.
Pacific Gas and Electric offers rebates for qualifying air sealing work, and the timing of the assessment matters for eligibility. We walk you through the enrollment process before the job starts - not after - so you do not miss rebates you are entitled to. ENERGY STAR also publishes federal tax credit guidance.
The vast majority of air sealing work happens in the attic and crawl space. We do not need to touch your trim, walls, or original finishes to do this effectively. When the crew leaves, your home should look exactly as it did when they arrived - just perform dramatically better.
These are not promises we make to win a bid - they reflect how we have been working in Eureka homes for years. When you hire us for air sealing, you get real measurements, honest recommendations, and a finished job you can verify.
Focused sealing of the attic floor - the single largest source of air leakage in most Eureka homes and the most impactful place to start.
Learn MoreInsulate and seal the lower level of your home to stop cold air and ground moisture from entering from below.
Learn MoreEureka's foggy season is long - seal your home now and feel the difference before the wettest months arrive. Spots fill up fast, so reach out today.