Open-cell foam insulation in Torrance CA - an attic sealed with the ducts inside
Hot upstairs and a power bill that climbs each summer? We foam the underside of your roof so the attic ducts sit inside the house.

- Licensed and insured.
- Free quotes on site.
- Expect a reply within 1 business day.
Is open-cell spray foam worth it for a Torrance attic?
Open-cell foam insulation in Torrance gets sprayed onto the underside of your roof deck, where it insulates and seals air leaks around rafters and awkward framing better than batts or loose fill can, so the attic stops cooking the rest of the house.
Most people call because upstairs is hot, the ducts live in the attic, or the framing up there is too chopped up for batts. The price turns on how much roof there is to cover, how complicated the framing is, and whether anything has to be fixed or pulled out first, like a leak or old insulation that needs insulation removal. The schedule mostly waits on those fixes and on when your household can be out of the house, and the estimate lays out what gets fixed first, what gets sealed and what goes in.
How do you know your attic could use spray foam?
Hot rooms upstairs
The bedrooms upstairs stay warm long after the sun goes down, and the room over the garage is worse. That usually means attic heat is coming straight through the ceiling, and every summer you wait it shows up on the power bill.
Ducts in a baking attic
If your ducts or AC unit sit in the attic, the cool air travels through the hottest room in the house before it reaches you. Waiting means the system runs longer to keep up, which wears it out sooner.
Framing batts won't fit
Sloped ceilings, hips, valleys and tight corners leave gaps that batts and loose fill can't close, so those rooms feel drafty and uneven. Left alone, those gaps keep leaking air no matter how much you pile on the attic floor.
Work that often goes with foam
Commercial insulation
If you own or manage an office, shop or rental building, this is the same careful look and install on a bigger roof.
Crawl space vapor barrier
When the floors feel cold or the crawl space smells damp, a barrier over the ground keeps that moisture out of the house.
How we install open-cell foam insulation
I start by checking the roof deck, the wiring and the ducts, because leaks, damp spots and old wiring get dealt with before any foam goes on. Then the crew covers what needs covering in the house, closes the attic off from outside and sprays open-cell foam along the underside of the roof deck, working it into the corners and around the odd framing where batts never fit. Open-cell lets water vapor pass through it, so a sealed attic needs a way to handle moisture, and we build that into the plan from the start instead of hoping the attic sorts it out on its own. When the foam's in, the crew cleans up and I go up and check it.
Some jobs reach past the attic. If your house sits over a crawl space, a crawl space vapor barrier keeps damp ground from feeding moisture into the house while the attic gets sealed above it. Building owners and property managers can call us for commercial insulation too, and I'll look at the building the same way before quoting it.
Foam under the roof deck
This suits houses with ducts or the AC unit in the attic, because sealing the roof side brings all of it inside the house where it belongs. It costs more than loose fill, and it's the option I'd pick when the ductwork lives up there.
Air sealing and loose fill instead
If the attic has no ducts or equipment, sealing the gaps around lights, pipes and the hatch and then topping up with blown-in insulation, loose fill blown through a hose, usually gets you more for the money. I'll tell you when that's the better job, even though it's the smaller one.
Get a free estimate for open-cell foam in your attic
Send this and we'll reply within one business day to set a time. I'll come out, look at your attic and give you a free, no-obligation estimate on site. Calling (424) 318-3075 works too.
Call (424) 318-3075Why Torrance homeowners call SealPro Torrance Insulation Company for open-cell foam
I write every estimate myself
I come out to every job and look at the space before anything goes on paper. If there's a leak or tired wiring where the foam would go, you hear about it first, because foam can't fix what it covers.
In business since 2017
We've been insulating homes since 2017, and a crew I trained does every install. I check their work before we leave, because foam is a lot harder to redo than to get right.
Licensed and insured in California
We're licensed and insured. The Contractors State License Board treats insulation as its own contractor trade, covering any material put in to control heat or sound, so it's fair to ask anyone spraying your attic about their license.
Planned for Torrance's climate zone
The state's building climate zone list uses Torrance as the reference city for its zone, and California's energy rules for a home's outer shell depend on that zone, for improvements to existing homes as well as new ones. We're based in Torrance and work in the cities around it, so the plan for your attic starts from the rules that apply here.
Get the roof and the moisture plan right and the foam does its job. Tell us about your attic and I'll come take a look.
What happens when you call about open-cell foam in Torrance?
Call or send a request
Call (424) 318-3075 or use the form, and we'll get back to you to set a time for me to come out. Let us know if the ducts or AC unit are in the attic, since that shapes what I'll look at.
I look and write the estimate
I go up into the attic, check the roof deck, wiring and ducts, and write an estimate that lists what gets fixed first, what gets sealed and what goes in, so you see what the money's for before you decide. Whether the job needs a permit is up to the office that covers your address, so we check with them before we start.
We spray, clean up, check
The crew does the install while your household is out, then cleans up after itself. I check the work before we call it finished.
Common questions
Does spray foam under the roof deck help if my ducts are in the attic?
Yes, usually, because foam under the roof deck brings the attic and the ducts and equipment in it inside your home's insulated shell. Heat loss from the ducts stays low, and any air that leaks out of them still ends up heating or cooling the house instead of the attic.
How do I prepare my roof before spray foam insulation in Torrance?
Any roof leaks get fixed and the damage repaired before foam goes under the deck. If your roof is at or near the end of its life, replacing it first is often worth it so the roof over the foam keeps water out, and I check the deck from inside during the estimate.
How long do we have to leave the house after spray foam insulation?
Plan on at least 24 hours away. Federal consumer safety staff advise homeowners to leave during the install and for at least 24 hours after, so line up a place to stay for everyone, kids and pets included, and anyone sensitive to fumes. Ask your contractor to walk you through their safety steps, and we go over ours with you before the job.
Is open-cell spray foam safe if someone in my house has asthma?
It may not be the right choice for them. An older EPA page advises people with asthma, respiratory allergies, skin conditions or a past reaction to isocyanates, chemicals used to make spray foam, to review the product information carefully, and some may want to consider other insulation. Tell me at the estimate and we'll look at options like air sealing and loose fill.
Does spray foam in my attic need to be covered?
Sometimes. Spray foam may need a thermal or ignition barrier, a coating or drywall layer over the foam, depending on the foam's properties and what the code requires, so we work that out as part of your plan.
How much does insulation cost in Torrance and the Los Angeles area?
Added or replaced insulation in the Los Angeles area usually costs about $1,500 to $4,900 per job. That's the general range for insulation work, not a quote for open-cell foam on your roof, which turns on the roof size, the framing and any repairs that come first. Your own number comes from the estimate after I've seen the attic.
Have your attic checked for open-cell foam
Have your roof's age, any past leaks and whether the ducts or AC sit in the attic handy when you call (424) 318-3075, because those three answers shape the plan.




