Upstairs rooms that won't cool
When the bedrooms under the attic run warmer than the rest of the house, foam under the roof keeps that heat from building up over their ceilings in the first place.
Open-cell foam insulation in Modesto CA - a sealed, quieter attic over your ductwork
Upstairs rooms that won't cool and ducts in a hot attic? We spray foam under the roof so the attic becomes part of the house.
- Licensed and insured.
- Free on-site estimates.
- We respond within 1 business day.
What open-cell foam does in a Modesto attic
Open-cell foam insulation is sprayed in place, and in Modesto we usually put it on the underside of the roof deck, where it stops air leaks, slows heat and quiets the rooms below.
Most calls start with an upstairs that won't stay comfortable, a room over the garage that runs its own weather, or a power bill that keeps climbing, and the furnace and ducts are often up in the attic too. Modesto is home base, and we work in the cities around it in Stanislaus County and over into San Joaquin and Merced counties, so call and ask if you're not sure we come out your way.
The price moves with how much roof deck we cover, how thick the foam goes, whether old insulation has to come out first and whether the product needs a protective coating or drywall over it, which some foams do. The schedule turns on the same things, plus any roof repair that has to happen first and the time your household spends out of the house while we spray. Your own number comes from the estimate, after I've seen the attic.
Foam only when it's worth it
Foam costs more than sealing the gaps and topping up loose fill, and that cheaper route usually wins unless the ducts live in the attic. I'll tell you which one your house needs.
Problems get fixed before foam
Wet spots, old wiring and droppings get dealt with before anything covers them, because once the roof deck is sprayed, nobody sees that problem again until it's worse.
We check what burns fuel
A sealed attic makes the whole house tighter, so we check the furnace, water heater and anything else that burns fuel before we spray, and make sure it still gets the air it needs.
How we spray open-cell foam under the roof
Open-cell does the most good under the roof deck when your furnace or ducts sit in the attic. Spraying the deck pulls them inside the insulated part of the house, so they lose less heat, and whatever air leaks out of the ductwork still ends up heating or cooling your rooms instead of the attic.
The catch is that open-cell lets water vapor pass through, so it can't act as a vapor barrier, and a sealed attic still needs a way to get rid of moisture. We work out how your attic will dry before we spray, as part of the same job, and we look at where the moisture comes from in the first place, which is sometimes a damp crawl space that needs a crawl space vapor barrier.
On spray day, our installers cover what shouldn't get foam on it, spray the deck at an even depth all the way down to the edges, where thin coverage usually hides, and clean up. Then I walk the attic with you. The same foam goes on roof decks over offices and shops, where the quiet is often the point, and that work is on our commercial insulation page.
Where open-cell foam makes sense
The room over the garage
Bonus rooms over a garage often have attic space on two or three sides. Spraying the roof above closes in the whole space instead of chasing every thin spot around it.
Noise you'd rather not hear
Open-cell soaks up sound well, so it suits a home office, a nursery or a bedroom under a roof that picks up rain and road noise from the street.
Rentals between tenants
Landlords call us when a rental sits empty, which is the easy time to spray, because nobody has to find somewhere else to stay and the attic can be looked over properly.
Get an open-cell foam estimate for your attic
Send the form and we'll get back to you within one business day to set a time. I come out, look at the attic myself and write the estimate, free and with no obligation.
Your attic's rough size
The square footage of the house or the attic is plenty. It tells us how much roof deck there is to cover, which is most of what drives the cost.
How old the roof is
A ballpark age is fine. An old roof changes the order of the job, and we'd rather plan for that now than find out halfway through.
Where the furnace and ducts sit
Tell us if the furnace, air handler or ducts are up in the attic. That's usually what decides whether foam is worth it or loose fill will do the job.
Open-cell foam finishes and attic examples
Examples of open-cell foam on roof decks, rafters and around ducts, to help you picture coverage depth and what a finished attic can look like.
Open-cell foam questions from Modesto homeowners
Straight answers on choosing a foam, what it costs here, your roof, permits and when everyone can come back inside.
Is open-cell or closed-cell spray foam better for my Modesto home?
Open-cell is the better pick if price and quieter rooms matter most, and closed-cell is better if you need the most insulation per inch, since it has about twice the insulating power per inch and costs more. Under a roof deck with the ducts in the attic, open-cell is usually the one I'd recommend.
How much does open-cell spray foam insulation cost in Modesto?
One Modesto cost guide puts open-cell spray foam at about $1,800 to $2,700 for 1,000 square feet sprayed 3 inches thick. Your job will differ with how much deck we cover, how thick it goes and what has to happen first, like pulling out old insulation. The on-site estimate gives you a current number for your house.
Can spray foam go under my existing roof without replacing it?
Yes, foam can go under the existing roof deck without new roofing, unless the roof is near the end of its life. The roof still has to keep rain out, with good flashing and water control, because foam won't stop a leak and can hide one. If I see a roof problem, I'll tell you before we spray.
How soon can my family and pets come back inside after spray foam?
Plan on everyone, pets included, being out while we spray, because the EPA's older, archived guidance calls for no occupants or other trades in the house during spraying. Some foam makers recommend waiting 24 hours before going back in, but it varies by product, so we'll tell you what our foam's maker recommends before spray day.
Do I need a permit and a licensed contractor for spray foam in Modesto?
The City of Modesto requires permits for construction so the work meets safety and building codes, and when your job needs one, we pull it with the city or county that has your address and set up the inspection before the foam is covered. We're licensed and insured, and California only lets an unlicensed worker take jobs under $1,000 that need no permit and no employees.
What paperwork should I get after spray foam insulation is installed?
Get a written statement that the insulation meets the state's requirements, because California's Energy Code requires the installer to certify that to you in writing. We hand it over when I walk the finished attic with you, and our work is satisfaction guaranteed.
Other work that pairs with spray foam
Call about your attic any day
We pick up seven days a week from 7 AM to 11 PM, so call (209) 222-5441 or send the form when it suits you.