Open-cell foam insulation in San Luis AZ - a sealed attic with your ducts out of the heat
Hot rooms and a summer power bill that keeps climbing? We foam under the roof so attic ducts sit in cooled air.
- Services
- 16
- Service areas
- 3
Get an estimate for your attic foam
We look in the attic, check where the ducts run and measure the roof deck.
Request an estimateShould I put open-cell spray foam in my attic?
Open-cell foam insulation is spray foam we put on the underside of your roof deck in San Luis. It seals the attic and makes it part of the insulated house, so it stops acting like an oven over your ceiling. It's usually worth doing when your ducts run through the attic.
Most calls start with a hot room, a power bill that won't come down, or an air handler sitting in an attic that bakes all summer. The price comes down to how much roof we're covering, how thick the foam goes, whether the product needs a coating over it, and whether old material has to come out first through insulation removal. The schedule depends less on the spraying than on clearing the attic and planning your family's time away from the house. You get your own figure on the written estimate after we've been up there and gone over what the house needs.
How we install open-cell foam insulation
We start by finding where the ducts and air handler run, what shape the old insulation is in, and whether anything up there burns gas and needs air, because those safety checks come before anybody seals a house up tight. Next we settle how moisture will get out of the attic once it's closed up. On spray day the crew covers what's below, closes off the old roof vents and sprays the underside of the roof deck in even passes. They work all the way out to the edges where the roof meets the walls, because thin edges are where foam jobs usually come up short. Then we clean up and haul out what we brought in.
Property managers call us for commercial insulation when a shop or office has the same hot-roof problem. If the house sits over a crawl space, we look at a crawl space vapor barrier too, because a tighter house holds onto whatever damp air comes up from the dirt.
What open-cell foam insulation is up against in San Luis
The city's building code plans cooling around 109 degrees outside and 75 inside. An attic under a San Luis roof runs hotter than that outdoor number, so ducts up there are working in the worst air on the property. San Luis has adopted the International Energy Conservation Code with its own city amendments, and the city's Building Safety Division enforces the building code. Before work starts, we check with that office on what applies to your house.
Plenty of houses we get into here have the air handler and ducts in the attic, with thin, dusty insulation on the floor and eave vents half buried. We're based in San Luis and see the same setup on jobs in Somerton and Yuma, and in the cities around them.
Why call us for open-cell foam
The owner writes your estimate
I come out myself, look over the attic and write up the estimate, so the person pricing the job is the one who answers for it. A crew lead runs the install with the crew, and I check the work at the end.
In business since 2021
I worked on insulation crews when I was young, spent years in other work, then came back and started this business in 2021. Coming back with fresh eyes made me strict about doing every step in order, and that order is what keeps a sealed attic from turning into a moisture problem.
Licensed and insured, ask to see it
We're licensed and insured. Federal safety guidance tells homeowners to check a foam contractor's insurance and licenses, so ask us for both and hold every other bid to the same standard.
Foam only when it pays off
Foam costs more than loose fill, and if your ducts aren't in the attic, sealing the gaps and topping up with blown-in insulation, loose fill sprayed through a hose, usually does the job for less. I'll tell you that at the estimate, because I'd rather talk you out of work you don't need than sell it to you.
- Phone
- (928) 550-6036
- Hours
- Mon–Sun: 7 AM–10 PM
- Location
- San Luis, AZ 85349
On this job, the moisture plan and your day away from home matter as much as the foam. Set up a visit, and have the rough size of the attic, where your ducts run and who lives in the house ready.
Get a written estimate for open-cell foam in your attic
Send the form and we'll reply within one business day to set up a free on-site estimate, with no pressure and no obligation. I come out, look at the attic and where the ducts run, and go over what your house needs. Then I write it up so you can decide.
- Phone
- (928) 550-6036
- Location
- San Luis, AZ 85349
- Hours
- Mon–Sun: 7 AM–10 PM
- Credentials
- Licensed and insured.
Frequently asked questions
How much does open-cell spray foam insulation cost in San Luis, AZ?
Across the US, open-cell spray foam usually costs about $0.45 to $0.65 per board foot, which is one square foot of foam one inch thick. Your total depends on how much roof deck we cover and how thick the foam goes, plus any coating or old insulation that has to come out. We measure all of that at the estimate and put your figure in writing.
How do I keep moisture from building up in an attic sealed with open-cell foam?
You plan a way to remove moisture from the attic, because national guidance says every sealed, unvented attic needs one. At typical thickness, open-cell foam blocks air well enough to count as airtight, but water vapor still passes through it, so it stops drafts without stopping vapor. That's why we settle where moisture goes before the crew sprays.
How long do I have to stay out of my house after spray foam insulation?
Plan on at least 24 hours, because Consumer Product Safety Commission staff advise residents to leave the house for at least that long after spray foam goes in. That wait, called re-entry time, also depends on the product, the type of home and whether children or older relatives live there. We tell you what the product we're using calls for before we book the day, so you can line up where the kids and pets will stay.
Why does spray foam under the roof help ducts in the attic?
It puts your ducts inside the home's insulated shell instead of out in a hot attic. The ducts lose less to the attic air, and any air that leaks from them still helps cool the house instead of the attic.
Does open-cell spray foam have to be covered after it's installed?
Sometimes, and the foam product decides it. National guidance says to cover spray foam with a thermal or ignition barrier, a protective coating or drywall over the foam, when the foam's properties or the code call for it, and not every foam needs one. We check what the maker requires for the product we're using and include any covering in your estimate.
Do I need to remove old insulation from my attic before spray foam?
Usually not if it's dry and clean, because the foam goes on the roof deck above it. If the old insulation is soaked or full of droppings, we pull it out first, since leaving it in a sealed attic keeps the smell and the mess inside your house.
Related insulation work
Commercial insulation
Shops, offices and rental buildings lose cooling through the roof like houses do, so we plan around business hours and the time the space has to sit empty.
Crawl space vapor barrier
A plastic sheet laid over bare crawl space dirt stops ground damp from working up into the floor framing, a good match for a house we've just sealed.