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Serving Windsor, CA and surrounding areas. (707) 687-4753
Hidden gaps in your attic floor let conditioned air escape and pull wildfire smoke in. We find and seal every one, then verify the results with a blower door test so you know it worked.
Attic air sealing in Windsor, CA means finding and plugging the gaps, cracks, and holes in your attic floor that let conditioned air escape and outside air sneak in. These openings are often hidden around light fixtures, plumbing pipes, and the tops of interior walls. A contractor uses foam and caulk to close them off, then runs a blower door test to confirm the leakage rate actually dropped. Most jobs are finished in a single day.
Insulation slows heat from moving through solid surfaces, but it cannot stop air from flowing through gaps. That is why attic air sealing always comes before insulation - and why we often pair it with retrofit insulation on the same visit. Sealing first, then insulating, gives you the full benefit of both improvements without disrupting your attic twice.
For Windsor homeowners, attic air sealing addresses two real problems at once: high summer cooling bills and the threat of wildfire smoke entering your home through uncontrolled gaps in your attic floor.
If your second floor or rooms directly below the attic feel significantly warmer than the rest of the house during Windsor's hot summers, heat is moving through gaps in the attic floor. Your air conditioner may run constantly but still struggle. That is an air leakage problem, not a thermostat problem.
If your home smelled smoky during Sonoma County fire events even with windows closed, smoke entered through somewhere. Attic gaps are a common pathway - smoke infiltrates the attic and gets pulled down into living spaces through the same holes that let conditioned air escape. This is a Windsor-specific concern many homeowners do not connect to attic air sealing until a contractor points it out.
Recessed light fixtures and ceiling fan boxes are among the most common places where attic air leaks into living spaces. Hold your hand near one on a warm day - if you feel warm air or notice a dusty smell, air is moving through gaps that should not be there. You can check this yourself in about five minutes.
Windsor grew rapidly during the 1990s, and homes built then were constructed to standards that did not require thorough attic air sealing. Many of those gaps have been there since day one. If your home has never had an energy assessment, a contractor with a blower door test will almost certainly find improvements to make.
Every job starts with a blower door test - a calibrated fan mounted in your front door that pressurizes the house and measures exactly how leaky it is. That baseline number guides where we focus the sealing work and gives you proof of results when we run it again after the job is done. The sealing work itself covers the entire attic floor: gaps around recessed lights, plumbing and wiring penetrations, the tops of interior walls, and framing joints. We use spray foam and caulk to close those openings completely. For homes where the attic is the biggest problem but insulation also needs attention, we coordinate with our retrofit insulation process so both jobs happen in one visit.
We also help Windsor homeowners navigate PG&E rebates and Sonoma Clean Power incentives for qualifying work. Documenting the job correctly is the difference between claiming those rebates and missing them, and we handle that documentation before we leave. For homeowners who want whole-home performance, attic air sealing pairs naturally with our broader air sealing services that address walls, crawl spaces, and the rest of the building envelope.
Measures leakage before and after the work - so results are verifiable, not just visible.
Every gap around lights, pipes, wires, and wall tops is found and sealed, not just the easy spots.
The right material for each opening, applied completely so there are no partial seals.
Both jobs done in one visit when your attic needs new insulation added on top of sealed gaps.
We document the work to PG&E and Sonoma Clean Power standards so you can claim every incentive you qualify for.
Closes the attic entry points that allow smoke to be pulled into living spaces during fire season.
Windsor incorporated in 1992 and saw rapid residential growth through the late 1990s and 2000s. Homes from that era were built to energy standards that did not require thorough attic air sealing - which means many Windsor homes have gaps that have been there since the day they were built. Add in Windsor's long, hot summers, where temperatures regularly push into the 90s, and attic gaps become a direct driver of high PG&E bills. When superheated attic air has pathways into your living space, your AC has to fight against it constantly. Homeowners in Santa Rosa and Healdsburg face the same conditions and have seen real comfort improvements after sealing their attics.
Wildfire smoke is a second reason Windsor homeowners are prioritizing this work. Sonoma County has experienced significant fire events in recent years - including the 2019 Kincade Fire - and smoke infiltration is a genuine seasonal concern. Attic gaps are one of the primary pathways smoke uses to enter homes even when windows and doors are closed. Sealing those gaps does not make your home airtight, but it reduces the uncontrolled entry points that matter most during a smoke event. The U.S. Environmental Protection Agency recognizes indoor air quality as a serious health concern, and reducing smoke infiltration is one of the most practical steps Windsor families can take. For more on why the attic is the priority, see the U.S. Department of Energy guidance on air sealing.
We ask a few basic questions - your home's size, age, and whether any insulation work has been done before. Most Windsor homeowners get a response within one business day and an in-home assessment scheduled within a few days.
A technician walks through your home and spends time in the attic identifying gaps and assessing what is already there. Many assessments include a blower door test at this stage. You receive a written estimate before any work is scheduled - no pressure, no surprises.
The technician works systematically across the attic floor, sealing every gap with foam or caulk. The job is dusty and takes a few hours. You can stay home throughout - just keep pets out of the area, as the foam has a strong smell until it cures.
We run the blower door test again to confirm the leakage rate dropped. We walk you through what was found and what was sealed, provide written documentation, and handle any rebate paperwork before we leave.
Free estimate, written quote, no obligation. We reply within one business day.
(707) 687-4753We measure before we seal. A blower door test before the job gives you a real baseline, and running it again after gives you proof the work made a measurable difference. You are not taking anyone's word for it.
PG&E and Sonoma Clean Power both offer rebates for attic air sealing, but only if the work is documented correctly. We know what the programs require and handle that paperwork before we leave - so you can claim every dollar you are entitled to.
We work regularly in Windsor's 1990s and 2000s subdivisions and know the common gap locations in homes from that era - around can lights, at top plates, and where plumbing chases run. That means we find more and miss less. California Contractors State License Board licensed contractors only. Verify any contractor at cslb.ca.gov before you hire.
Sealing attic gaps is one of the most direct steps Windsor homeowners can take to reduce smoke infiltration during Sonoma County fire season. We prioritize the entry points that matter most for smoke, not just energy efficiency.
Every one of these points reflects how we actually run a job - not marketing language. Windsor homeowners who have worked with us know the difference between a contractor who shows you a number went down and one who just tells you it did.
Add new insulation on top of sealed attic gaps to maximize energy savings in one coordinated project.
Learn MoreExtend air sealing beyond the attic to walls, crawl spaces, and the full building envelope for whole-home performance.
Learn MoreSummer is the longest season in Sonoma County - do not spend another one paying to cool air that is escaping through your attic. Call now or request a free estimate online.