J&S Vacaville Insulation ServicesJ&S Vacaville Insulation Services(707) 452-3285

Air sealing services in Vacaville CA - fewer drafts and appliances that still breathe

Drafty rooms or a hot upstairs usually mean air leaks. We check your appliances first, then seal the gaps so the rooms stay comfortable.

Worker in protective coveralls applies spray foam along the lower wall of a concrete enclosure with a hose-fed gun.

Why does my house still feel drafty with insulation in the attic?

Air sealing services in Vacaville close the cracks, holes and gaps where air leaks in and out of your house, mostly through the attic floor, so rooms stop feeling drafty and the house holds the heat or cool you're paying for.

Insulation slows heat, but air slips right past it through gaps around can lights, pipes, wiring and the attic hatch. That's why the upstairs stays hot, the room over the garage never feels right and the floors run cold even when there's plenty of insulation up there.

The price moves with how many leaks there are, how deep they're buried, how easy the attic is to crawl through and whether you're adding insulation in the same visit. The schedule turns on those same things plus any permit your job needs, and the written estimate I send after seeing your attic gives you the figure for your house.

  • We seal around can lights, plumbing and wiring holes, wall tops and the attic hatch.
  • Gaps around the chimney or flue get metal and high-temperature sealant, not ordinary foam.
  • Crawl space openings under the floor get sealed too when cold floors are the complaint.

What happens when you call us about air sealing in Vacaville?

From your first call to the final walk-through, you deal with me and our installers. Here's how an air sealing job runs, start to finish.

  1. Call us or send the form

    Call (707) 452-3285 or use the form, and we'll set a time for me to come out. Have your house's age handy, plus whether the attic already has insulation and which appliances burn gas or wood.

  2. I check the attic myself

    I come out myself, get into the attic or under the house, and look for anything that has to be dealt with before sealing, like old knob and tube wiring, vermiculite, a bath fan venting into the attic or a roof leak. Before I leave I tell you what I'd do first and why, even when it's the smaller job, and the written estimate follows.

  3. Our installers seal the house

    Our installers do the work on the day we set, sealing the leaks we went over with you at the estimate. If your job needs a permit, we apply for it and set up the inspection ourselves.

  4. We walk the job together

    I look over the finished work with you before we call it done, including the spots that were buried under old insulation. You'll see what got sealed and what got left open on purpose.

How we do air sealing, and why the order matters

Before we seal a single gap, I work out how much fresh air your house needs and how your furnace, water heater and fireplace get their air, because a tighter house leaves less for anything that burns fuel, and an appliance short on air runs poorly and can put carbon monoxide into your home. Once that's settled, our crew closes the leaks in the attic floor and anywhere else we found them, and leaves soffit, ridge and gable vents and combustion air ducts open, since those are meant to move air. When you're adding attic insulation too, the sealing goes first so the new layer isn't sitting on top of a draft.

Air sealing often leads into other work. Where the drafts come from a lower level, basement insulation usually follows once we've sealed the gaps where the walls meet the foundation, and where ductwork runs through the attic, closed-cell foam insulation, a dense foam that blocks moisture, seals and insulates in one pass.

  • Sealing on its own

    This suits a house that already has a decent layer of insulation but still feels drafty. It's usually the smallest job that fixes the real problem, and it's where I'd start if that's all your attic needs.

  • Sealing plus a loose-fill top-up

    For most attics with thin or settled insulation, we seal the gaps and then add blown-in insulation, loose fill blown through a hose, built up at the edges where it usually runs thin. It costs less than foam and does the job when the attic is just open framing and storage.

  • Spray foam where the ducts run

    Foam costs more, but it seals and insulates at once, which earns its price when your ductwork lives in the attic. Outside of that, I'd usually point you to sealing and loose fill.

A written air sealing estimate after I've been in your attic

Send the form or call (707) 452-3285 and you'll hear back within one business day to set a time. I come out for a free on-site estimate, and the written price comes with no pressure and no obligation.

(707) 452-3285

Questions Vacaville homeowners ask about air sealing

These are the questions we hear most about air sealing in Vacaville, from cost to testing. If yours isn't here, ask me when I'm up in your attic.

Is air sealing worth it for a house in Vacaville?

For most drafty houses, yes, because leaks left open make rooms uncomfortable, push your heating and cooling to work harder and run up the power bill. They also let in moisture that can damage the wood framing and lead to mold, which costs far more to fix than the gaps did.

Can I air seal my attic myself?

You can caulk the easy gaps, but do-it-yourself sealing tends to miss the small, hard-to-find leaks, especially in an older attic where layers of insulation cover them. If your attic already has insulation in it, that's where a pro who knows where to dig pays off, along with the appliance check we do first.

What is the best way to air seal an attic that already has old insulation?

If the old insulation is dry and clean, we move it aside, seal the leaks underneath and put it back or top it up. If it's soaked or full of droppings, it has to come out first with insulation removal, because new material over a bad layer just keeps the problem.

How do I get ready for a blower door test?

Close your windows and outside doors and turn off the dryer and any bathroom fans, because that's what you may be asked to do, and the tester may need to get into the attic or crawl space. A blower door test measures how tight your house is, so ask whether your job includes one. Depending on the work, state rules may also require HERS testing, a Home Energy Rating System check, which properly permitted work triggers when it's needed.

How much does air sealing cost in Vacaville?

I give you a price only after I've been in your attic, because the number of leaks and how deep they're buried change the job more than the size of the house does. Sealing on its own usually comes in below sealing with a top-up or foam, and Solano County's energy page points residents to BayREN for rebates on home insulation, heating and cooling, so check what's offered before you book.

Does a small air sealing job need a licensed contractor in California?

If the job is over $1,000 or needs a permit, yes, because the state licensing board only lets an unlicensed person do minor work up to $1,000 when it needs no permit and they have no one working for them on it. We're licensed and insured, so the size of your job doesn't change who can do it.

Air sealing services in Vacaville and nearby cities

The City of Vacaville's express permit list names attic insulation and HVAC, not air sealing, so we'll check at the estimate whether your job needs one and apply if it does. Houses in Fairfield and Dixon hide the same leaks.

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