Closed-cell foam insulation in Petaluma CA - a sealed, dry space that holds its heat
Cold floors, a damp-smelling crawl space or a drafty room over the garage? Dense foam seals the air out and holds your heat.
Have me look before you pick a foam
Call (707) 238-6044 or use the form, because the right foam depends on what's actually up in your attic or down in your crawl space, and that's easiest to judge in person.
Is closed-cell spray foam worth it for your Petaluma house?
Closed-cell foam insulation is a dense spray foam that hardens in place, seals air while it insulates and won't soak up water, and here in Petaluma, CA we put it where those traits earn the higher price. Most jobs also mean planning some time out of the house, which I'll walk you through.
Most closed-cell calls I get start with a crawl space that smells damp, a bedroom over the garage that's freezing, or an older house that stays drafty no matter what you do with the thermostat. The price moves with how many square feet we're covering, how thick the foam goes on and how much cleanup and sealing the space needs first, while the schedule turns on how easy the space is to reach and when your household can be away. Sometimes crawl space insulation with a different material is the better answer, and I'll say so. Your own figure comes from the estimate when I come out and look. We're based in Petaluma and work in the cities around it, from Windsor and Santa Rosa down to Mill Valley and over to Sonoma and Napa.
Why Petaluma homeowners call Evergreen Petaluma Spray Foam Insulation for closed-cell foam
You talk to the owner first
I come out myself to look at the space and write the estimate. You hear what I see in plain words, from the same person who checks the finished work with you.
Licensed and fully insured, every job
We're licensed and fully insured, so the risk of a crew in your attic isn't yours. California's Contractors State License Board lists a C-2 class for insulation work, so ask anyone you call what they hold.
Taught the order in Petaluma attics
I grew up handing my dad tools in Petaluma attics and started this business on his lessons in 2017. His biggest one was doing things in the right order, because that's what makes insulation pay off.
On closed-cell, the right call starts with whether your space actually needs it, so tell us about yours and I'll come take a look.
How we install closed-cell foam insulation
Before I plan anything, I ask whether anyone at home has asthma or allergies, because that can change whether foam is right for you at all, as the FAQ below explains. Then I'm upfront that closed-cell costs more than open-cell, and we work out together whether that space needs it. For a plain attic floor, sealing the gaps and topping up blown-in insulation, loose fill blown through a hose, usually wins, but when the ductwork lives up there or the space sits over damp ground, foam earns its keep because it seals the air while it insulates. If we go ahead, our crew does the insulation removal first wherever the old stuff is soaked or full of droppings, seals around pipes, wiring, can lights and the hatch, keeps the eave vents open where the attic needs to breathe, and sprays evenly so the edges get as much foam as the middle.
If the space stays dry and you mainly want warmth and quiet, open-cell foam insulation is softer and costs less for the same space, and I'll tell you when it's the smarter buy. Property managers with a rental, shop or office building can call us for commercial insulation, where the same order of work applies on a bigger footprint.
Rim joists and crawl spaces
The rim joist, the band of framing that sits on top of your foundation, is a common draft spot, and spray foam seals and insulates it in one step. Closed-cell needs less thickness than open-cell to count as an air barrier, and at normal thickness it's also a vapor retarder, a layer that lets almost no moisture through, which suits the damp air under a house.
Open walls during a remodel
When the walls are open, closed-cell can go into the framing bays, and a Department of Energy guide reports it substantially increases how well frame walls resist racking, the side-to-side push that bends a wall out of square. The guide counts that as an advantage where earthquakes are a concern, so it's worth weighing if you're opening walls anyway.
How do you know your house could use closed-cell foam?
Cold floors every morning
If your floors feel cold all winter, heat is usually slipping down into a crawl space with little or nothing under the floor. Waiting just means the furnace runs longer every night.
A musty smell from below
A damp smell or sagging, wet batts under the house usually mean moisture is getting in and the old insulation has given up. Leave it, and the framing stays damp right along with it.
The room over the garage
If that bedroom bakes in summer and freezes in winter, its floor is usually barely insulated and leaking air. It won't fix itself, and you'll keep seeing it on the power bill.
Drafts along outside walls
Cold air along the baseboards of an older house often comes from bare framing where the walls meet the foundation. That draft runs all year until someone seals it.
What happens after you call us about closed-cell foam?
Set a time to look
We set a time for me to come out and look in the attic or crawl space. I talk through what I see in plain words, then write your estimate.
Plan your time away, then spray
Our crew lead and installers prep the space and spray while your household is out. We settle the re-entry time, when it's okay to come back in, before work starts.
Walk the finished job together
When the crew's done and cleaned up, I check the work with you before we call it finished. You see the coverage at the edges, not just the middle.
Closed-cell foam questions we hear
These are the questions Petaluma homeowners ask me most about closed-cell foam. If yours isn't here, call or send the form and I'll answer it for your house.
How much does closed-cell spray foam insulation cost in Petaluma?
Closed-cell spray foam for 1,000 square feet at 3 inches thick usually runs about $3,600 to $5,400 per job, going by 2022 San Francisco prices. That's one sample job size from a different city, so your own figure comes from the estimate once I've seen your space and how much prep it needs.
Why does closed-cell foam cost more than open-cell?
Closed-cell costs more mainly because it uses more material to fill the same space. You're paying for that density, so it's worth it where the foam has to stand up to moisture, and over a dry attic floor it often isn't.
How long do I have to stay out of the house after spray foam insulation?
Plan to be out while we spray and until the foam's maker says it's okay to return, which some makers put at 24 hours, though it varies by product. EPA's guidance is that anyone not doing the work leaves during spraying, on a schedule agreed with the contractor, so line up a place for the family and the pets, and I'll give you the maker's wait for the foam we're using.
Is spray foam insulation safe if someone in my family has asthma?
Foam may not be the best fit, because EPA guidance says anyone with asthma, respiratory allergies, skin conditions or a past reaction to isocyanates, a chemical in spray foam, should review the product information carefully. EPA adds that those households may want to consider other insulation, so we settle this before choosing a foam, and loose fill with air sealing is usually a good fallback.
How do I plan spray foam around a gas furnace or water heater?
Talk it through with an HVAC design professional as part of the plan, because an EPA checklist says a tighter house can limit fresh air, and spaces with combustion appliances, anything that burns gas, oil or wood, may need added air exchange so combustion gases don't build up. Tell me at the estimate what burns fuel in your house and where it sits, so that conversation happens before we spray.
Who do I call in Petaluma with questions about insulating an attic?
Petaluma's Building Division takes questions at (707) 778-4301 or building@cityofpetaluma.org. California's energy standards also have a section for insulation going into existing attics, and we find out what the city wants for each job, asking the Building Division before we start if I'm not sure.
Get a closed-cell foam estimate for your house
Tell us what you want insulated, rough square footage, any asthma or allergies at home and your gas appliances. We reply within one business day to set a time for my free on-site estimate, no obligation.
Closed-cell foam, up close
Other insulation work we do
Open-cell foam insulation
If the space stays dry and you mostly want a quieter, warmer room, softer open-cell foam can do the job for less money.
Learn moreCommercial insulation
Managing a rental, shop or office building? We bring the same order of work and plain answers to bigger spaces with more people to plan around.
Learn more