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

Insulation contractor in Davis, CA - attics sealed first, then insulated

J&S Vacaville Insulation Services is an insulation contractor based in Vacaville that works in Davis, CA. We insulate attics, walls and crawl spaces, seal the gaps that make rooms drafty, and pull out old insulation when it has to go.

Get an estimate(707) 452-3285
Loose white blown-in insulation covers an attic floor beneath a network of exposed wooden rafters.

How Davis houses look from the attic hatch

Davis is its own city with its own government, and we drive over from Vacaville the same way we head to Dixon or Woodland. The calls sound familiar. An upstairs that won't cool down on a summer evening, a room over the garage nobody wants to sleep in, a power bill that keeps climbing. We hear from homeowners and from property managers who look after rentals, and plenty of the houses sit near the parks and greenbelts people here walk every day.

Our crew works across the area, from Davis down to Suisun City, and the houses vary more than people expect. Older homes often have thin, settled insulation and open gaps around pipes and lights, while newer ones usually need sealing more than depth. What's in your attic and how easy it is to reach shape the job more than anything else.

Insulation services we offer in Davis

We bring the same services to Davis that we offer across the area, from attic sealing and blown-in insulation to foam, crawl space work and removing old material. Every job starts with me in your attic or crawl space, looking at what's there and what's causing the complaint. Then I write up what to fix first, which is usually sealing the gaps before adding anything, and our installers do the work in that order.

  • Spray foam insulation

    When ducts run through a hot attic or a room over the garage won't hold its temperature, spray foam can seal and insulate in one pass. It costs more than loose fill, so I only recommend it where the space really calls for it.

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  • Attic insulation

    Most calls we get from Davis start with an upstairs that stays hot well into a summer evening. We check how many inches are already up there, seal the gaps, then bring the coverage up evenly all the way to the edges.

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  • Blown-in insulation

    Blown-in insulation, loose fill sent through a hose, is how we top up most attics with thin or settled coverage. We set baffles, short channels that hold the airway open, so the insulation stays off the eave vents and the attic still breathes.

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  • Home insulation

    Some houses need more than one fix, like a drafty attic plus cold floors over a crawl space. We look at the whole house at the estimate and tell you which part to do first and which can wait.

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  • Insulation removal

    Older attic insulation can be packed down, water-stained or full of droppings, and new material laid on top just buries the problem. We vacuum it out, clean up and start over on a clean ceiling.

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  • Crawl space insulation

    Cold floors in winter usually trace back to a crawl space where the insulation under the floor has sagged or fallen. We replace what's down and fasten it so it stays tight against the subfloor.

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  • Wall insulation

    Exterior walls in older homes are sometimes empty, which is why one room feels colder than the rest of the house. We fill them through small holes and patch them, so you don't have to open the walls up.

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  • Air sealing services

    Drafty rooms usually come from dozens of small gaps around pipes, wires and outlets on outside walls rather than one big hole. Air sealing, closing those gaps before any insulation goes in, is what actually stops the draft.

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  • Basement insulation

    Most homes we see around here sit on a slab or a crawl space, but when a house has a basement, the walls and the rim joist are usually where the cold gets in. We insulate those and keep the space dry and usable.

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  • Closed-cell foam insulation

    Closed-cell foam, a dense foam that also blocks moisture, fits spots like a damp crawl space wall or a rim joist. It costs more than other options, so we save it for places where moisture is part of the problem.

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  • Open-cell foam insulation

    Open-cell foam is lighter and softer, and it works well on an attic roofline when the ductwork and furnace live up there. It fills odd shapes and seals air as it goes, though you'll be out of the house while it's sprayed.

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  • Commercial insulation

    Property managers call us about rentals, offices and small buildings where tenants complain about hot or cold rooms. We plan the work around who's in the building so tenants are disturbed as little as we can manage.

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  • Crawl space vapor barrier

    Bare dirt under a house lets moisture rise into the crawl space and the floor above it. We lay a vapor barrier, a heavy plastic sheet over the ground, and overlap and tape the seams so it stays put.

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  • Vapor barrier installation

    Where a wall, ceiling or crawl space needs moisture held back, the barrier has to go on the right side for our hot, dry summers. We check that before we install, because a barrier in the wrong place can trap water instead of stopping it.

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  • Attic air sealing

    The attic is where a house leaks most, through the tops of walls, can lights and the hatch. We seal those first, before any insulation goes down, so the new layer isn't fighting a draft.

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  • Retrofit insulation

    Retrofit work means adding insulation to a house that's already finished and lived in, which describes most homes we see. We reach the attic, walls and floors without tearing out ceilings or moving you out for long.

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What insulation work looks like up close

These photos show the kind of work our crew does in attics, walls and crawl spaces. They're examples of the trade, so you can see what sealing, blown-in coverage and foam look like before we start.

  • A worker in protective gear sprays white foam insulation between wall studs.

  • Loose-fill insulation covers an attic floor beneath exposed wooden roof trusses.

  • A crawl space has a white plastic vapor barrier beneath ducts and pink insulation between the joists.

Working in Davis: permits, licenses and what sets the price

Davis has its own city government, and state contractor rules apply to every job here. Here's how permits and licensing work with us, and what changes the price and the schedule before we start.

Permits, licenses and checking who you hire

Some insulation jobs need a permit and some don't, and I won't guess at yours before I've seen it. At the estimate I'll tell you how permits work for your job. When one is needed, we apply for it and set up the inspection ourselves, and the wait for that is one of the things that can move your start date.

You can check us before you sign anything, and I'd rather you did. Contractors in California are licensed by the state licensing board, so look up anyone you're thinking of hiring. For city business licenses, the City of Davis points people to its Finance page, which is where business license questions start.

  • We tell you at the estimate how permits work for your job.
  • When a permit is needed, we apply and book the inspection.
  • Davis business license questions start on the city's Finance page.

What moves the price and the schedule

Price comes down to what's up there now and what has to happen first. Old insulation that's soaked or full of droppings has to come out before anything new goes in. How many gaps need sealing, how much attic you have, how easy the hatch is to reach and whether foam makes sense all change the number.

The schedule turns on the same things, plus the permit when there is one. Blown-in work usually lets you stay home, while foam means clearing out until it's safe to come back. I come out to every job myself and write the estimate, so you'll have the price and the plan in writing before we book the crew.

  • Removing old insulation adds labor, cleanup and disposal to the job.
  • Foam costs more than loose fill and means leaving the house.
  • Your written estimate lays out the work and the price up front.

Get a free written estimate for your Davis home

Send the form or call (707) 452-3285, and we'll reply within one business day to set a time. I'll come out to your Davis home, look at the attic and anything else that's bothering you, and give you the estimate in writing. It's free, and there's no obligation to book.

(707) 452-3285

What we find in Davis attics and crawl spaces

Most houses we work on around Davis have one of a few problems hiding up top or underneath. Here's what we look for first, and why each one matters to the fix.

  • Upstairs rooms that stay hot

    Summer heat soaks into the attic all afternoon and works its way into the rooms below. When an upstairs stays warm into the night, we usually find thin coverage, open gaps or both. We measure how many inches are already there before we say what to add.

  • The room over the garage

    Rooms above a garage lose heat through the floor and through the knee walls, the short walls along the attic side. Those spots are tight to reach, so they often get skipped. We check the floor over the garage and those walls, because that's usually where the trouble is.

  • Old insulation that has to go

    Insulation in older attics can be flattened, stained from an old roof leak or full of droppings. Laying fresh material over it keeps the smell and the damage right where they are. When we find that, we remove it and clean the attic before anything new goes in.

  • Buried eave vents

    The vents along the edges of the roof let the attic breathe. When insulation gets blown over them, moisture can collect and show up in the framing. We keep those vents open and make sure coverage is full at the edges, not just piled deep in the middle.

  • Ductwork living in the attic

    Plenty of homes here run their ducts and furnace through the attic. That's the one case where I'll often point you toward foam on the roofline, because it seals and insulates around the equipment. Otherwise, sealing the gaps and topping up loose fill usually does the job for less.

Why we start with the right fix, not the biggest one

I sold insulation before I installed it, and that changed how I run this business. These are the practices behind every estimate and every job we do, in Davis and everywhere else we work.

We seal first, then we insulate

Insulation slows heat, but it doesn't stop air. If the gaps around pipes, wires, can lights and the attic hatch stay open, air moves right through the new layer and the room stays drafty. So our crew seals those gaps before any insulation goes down. That order is what we're best known for, and it's often what finally fixes the complaint.

I spent a couple of years selling energy upgrades before I joined an install crew, and I saw how easy it is to sell a big job to a house that needed a small one. I'd rather lose the sale than do that. If your attic needs sealing and a top-up, that's what your estimate will say.

  • The owner sees every job

    I come out to look at every job and write the estimate myself. Our installers do the work, and I check it before we call it finished. You deal with the same person at the start and the end, so the plan you agreed to is the plan we follow.

  • Licensed and insured in California

    We're licensed and insured for the insulation work we do. Look us up before you sign, the same way you'd check anyone working on your house. Ask at the estimate and I'll walk you through what to check and where.

  • We handle the permit work

    When a job needs a permit, we apply for it and set up the inspection ourselves, so you're not chasing an office during work hours. At the estimate I'll tell you how permits work for your job and how that affects the start date.

  • In business since 2017

    We opened in Vacaville in 2017 and have been working in attics across this part of the state ever since. Satisfaction guaranteed. Call (707) 452-3285, any day from 7 AM to 10 PM, or send the form, and I'll come take a look.

Questions Davis homeowners ask about insulation

These are the questions we hear most from homeowners in Davis, from licensing to summer heat. If yours isn't here, call or send the form and I'll answer it at the estimate.

Does an insulation contractor in Davis need a California state license?

Yes, a contractor needs a state license for almost any insulation job in Davis. The Contractors State License Board requires one when a job needs a building permit, uses any other workers, or totals $1,000 or more in labor and materials across one or more contracts. A small job only escapes that rule if it meets all three tests, and a bigger project can't be split into pieces under $1,000 to get around it.

How much does attic insulation cost in Davis, CA?

Your price comes in writing after I look at your attic, because what's already up there sets most of the cost. Removal, sealing, attic size and the material all move it, as laid out above under what moves the price. On home improvement work, the state also caps the down payment a contractor can ask for at $1,000, and lower on smaller contracts, so be wary of anyone asking for more up front.

How hot and wet does Davis get, and what does that mean for my attic?

Davis summers are hot and the rain is light. Long-term averages for 1991 through 2020 from a weather station just outside Davis put the hottest month's average high at 93.6°F, the coolest month's at 57.0°F, and the yearly rain at about 19 inches. That heat is the bigger problem for most houses here, so we focus on sealing and even attic coverage that helps keep upstairs rooms cooler.

How long does attic insulation take, and when can we go back inside?

With blown-in insulation you can usually stay home the whole time, and with spray foam you leave until the re-entry time passes. The re-entry time is the wait the foam maker sets before it's safe to come back in, and it applies to everyone, kids and pets included. How long we're in the attic depends on its size and whether old material comes out first, and I'll give you the timing for your job at the estimate.

How do I find out about local building code changes in Davis?

You can look them up on the California Building Standards Commission's list of local amendments, which sorts the local building code changes filed with the commission by year. Insulation work in California follows the statewide building code, and cities can file their own changes on top of it. We plan each job around the rules that apply to your house.

Can I insulate my own attic in Davis without a license?

Usually, yes, because California may exempt owners from licensing when they improve their own property themselves or with their own employees paid in wages. Anyone else you pay to do the work still falls under the license rules above. If you'd rather hand it off, call (707) 452-3285 and I'll come take a look.

Service areas

Davis is one of the cities we work in from our base in Vacaville, along with the ones listed here. If your city isn't on the list, call (707) 452-3285 or send the form and ask.

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(707) 452-3285Get an estimate