Closed-cell foam insulation in Ceres CA - one layer that seals out air and damp
Cold floors, drafts or a damp crawl space? Closed-cell foam seals the leaks and insulates in one layer, and it won't soak up water.

- Licensed and insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
Is closed-cell foam worth it for your Ceres house?
Closed-cell foam insulation is a dense spray foam, the kind that blocks moisture, and in a Ceres house it insulates and stops air leaks in the same layer. We use it where water or drafts are the problem, like a damp crawl space or the rim joists, the wood band that runs around the edge of your floor frame.
Most people who call about it have cold floors, a musty crawl space or a room over the garage that never feels right, and they've heard foam is the fix. Sometimes it is. The price moves with how much foam the space takes, which is the area times the thickness, how hard the space is to get into, and how much has to be fixed first, like wet old insulation, a leak or bad wiring. The schedule turns on that same prep, on any permit, and on when your household can be out of the house, so you'll get your own number and plan once I've seen the space.
What signs point to closed-cell foam in your house?
Cold floors near the walls
If the floor feels coldest along the outside walls, air is usually slipping in at the rim joists, where the floor frame sits on the foundation. Left alone, that draft keeps the room uncomfortable and your heater and AC running longer than they should.
A musty, damp crawl space
A damp smell or insulation sagging under the floor usually means moisture is getting in, and fiberglass holds that water against the wood. The longer it sits, the more the framing soaks up, and all of it has to be fixed before anything new goes in.
Hot rooms under attic ducts
When the upstairs or the room over the garage stays hot and your ductwork runs through the attic, the cool air is picking up heat before it reaches you. That's where foam at the roofline usually earns its cost, and waiting means paying for cooling you don't feel.
Other foam and building work
Open-cell foam insulation
A softer, lighter foam for dry walls and attics when you want the air seal without the closed-cell price.
Commercial insulation
Insulation for shops, offices and rental buildings, planned around the people who use them.
How we install closed-cell foam insulation
I start by looking over the space and writing down what I find, because foam hides whatever it covers. Leaks, old wiring and moisture get fixed first, and wet or dirty insulation comes out so the foam goes onto clean, dry wood. Our crew masks off the rest of the house, sprays the foam in passes until it reaches the depth on your estimate, and cleans up. You'll need to be out while it's sprayed and while the house airs out, so we help you plan a place to stay before the day is set. I'll be straight about cost too. Closed-cell runs more than other insulation, so I suggest it where moisture or rim joists make it worth the money, and in an ordinary attic, sealing the gaps and topping up loose fill usually wins unless your ductwork lives up there.
Closed-cell isn't the only foam we spray. If the space stays dry and you want an air seal for less, open-cell foam insulation is the softer foam and often the better buy. Landlords and property managers with shops, offices or larger rentals can look at our commercial insulation work, where we check the space first the same way.
Rim joists only
Best for drafty floors along the outside walls, because a layer of foam seals and insulates the edge of the floor frame without redoing the whole house. It's often the smallest foam job that makes a difference you can feel.
Crawl space walls and framing
Suits a crawl space that runs damp, since the foam sheds water once the source of the moisture is fixed. We sort out the water problem first, because foam over a wet spot just hides it.
Attic roofline with ducts
Makes sense when your ductwork runs through a hot attic, because foaming the underside of the roof keeps the ducts in a cooler space. Without ducts up there, sealing gaps and blowing in loose fill usually costs less and does the job.
Get a written estimate for closed-cell foam
Send the form and we'll reply within one business day to set up a free visit at your house, with no pressure to book. Calling (209) 225-2797 works just as well.
Call (209) 225-2797Why Ceres homeowners call Precision Ceres Insulation Services for foam
I look before I price
I'm usually the one who comes out, and I take notes and photos of the space before I put a number on anything. We've worked that way since 2017, so you see what I saw and why the estimate says what it says.
Problems fixed before foam goes on
Before I started this business, I spent years doing upkeep for a property management company, going back to attics and crawl spaces that had been covered over leaks and bad wiring. That's why the problems underneath get sorted first, so your foam isn't sealing trouble in.
Based in Ceres, permits handled
We're based in Ceres and work the cities around it, and here the city's Building Official issues permits for almost anything done to a structure beyond cosmetic work, with applications going through the county's online portal. If your job needs one, we file it, set up the inspection with the Ceres Building Division and go over it with you at the estimate, and you can read the rules on the city's building permits page.
Insured, with safety talked through
Licensed and insured, and I'll go over how the crew handles safety on your job before anything is sprayed, which is what federal product safety staff tell homeowners to ask a contractor about. Satisfaction guaranteed.
Closed-cell foam only pays off when what's under it is dry and sound, so the first step is a look at the space. Request an estimate or call (209) 225-2797.
What happens after you call about closed-cell foam in Ceres?
Call or send a request
Call (209) 225-2797 or use the form, and we'll get back to you to set a time for me to come out. It helps to tell us which space you're thinking about, like the crawl space or the room over the garage.
I look over the space
I check the area, take notes and photos, and measure what the foam would cover. You get a written estimate that lists what has to be fixed first apart from the insulation work, so you can see what each part costs before you decide.
Permit and prep get done
Once you say go, we take care of any permit and fix whatever the estimate lists first, like a leak or wet old insulation. We set the spray day with you so your household has somewhere to be.
Spray, clean up, walk through
Our install crew sprays the foam and cleans up, and once the house has aired out I walk the finished space with you. What you see should match the estimate line for line.
Common questions
How much does closed-cell spray foam insulation cost in the Modesto area?
Closed-cell spray foam in the Modesto area usually costs about $1 to $1.50 per board foot, which is one square foot of foam an inch thick. Your total depends on how much area gets foamed, how thick it goes and how much prep comes first, so two houses the same size can price very differently. The estimate is where your own number comes from.
How long does it take before we can go back in the house after spray foam?
Federal product safety staff advise leaving the home during the spraying and for at least 24 hours after, so plan a place to stay for at least that long. Federal guidance also says to wait until the foam has finished curing and the house has been aired out and thoroughly cleaned, and that goes for kids and pets too. We'll tell you when your house has reached that point.
Is closed-cell foam a good choice for a hot, dry place like Ceres?
Yes, a U.S. Department of Energy guide rates closed-cell foam as highly effective in hot-dry climates, at full thickness or paired with other insulation. The foam already slows moisture on its own, so the same guide says not to add a separate moisture-slowing layer on the inside.
Who is licensed to install insulation in California?
California's Contractors State License Board licenses insulation contractors, the trade that installs any insulating material for heat or sound control. Before you hire anyone for spray foam, check their license with the Contractors State License Board, us included.
How do I know if spray foam is safe for someone in my house with asthma or allergies?
Product safety staff say anyone with asthma, respiratory allergies, a skin condition or an earlier reaction to isocyanates, chemicals used in spray foam, should go over the product information carefully and can choose another type of insulation if needed. Tell me about it at the estimate, and we'll look at the product details together or talk about a different insulation for that space.
What's the difference between closed-cell and open-cell spray foam?
Closed-cell is the rigid, dense one, rated at R-6 per inch on R-value, the measure of how well insulation slows heat, and it repels water instead of soaking it up. It also takes a thinner layer than open-cell to stop air leaks, which is why it fits tight spots like rim joists. Like other insulation, it needs no upkeep once it's in.
Get your closed-cell foam job looked at
Call (209) 225-2797 or use the form, and tell us which space you want foamed and whether anyone at home has asthma, allergies or skin trouble, so I can plan the right product from the first visit.




