Open-cell foam insulation in Santa Rosa CA - an attic sealed against drafts
Hot rooms upstairs and a drafty attic mean air is moving where it shouldn't. Open-cell foam under the roof stops it and insulates.
Is open-cell spray foam right for my attic?
Open-cell foam insulation in Santa Rosa is a soft foam we spray along the underside of your roof sheathing, the boards under the roofing, so the attic gets insulated and sealed against air leaks in one step. Your household is out of the house while it's sprayed and cures, so we plan that day with you.
Most people who call us have a hot room upstairs, a drafty house or a power bill that keeps climbing, and an older attic they aren't sure about. The price moves with the size and shape of the roof, how deep we spray, how easy the attic is to get into and whether old or damaged material has to come out first through insulation removal. The schedule turns on that removal, any repairs I find, a permit and inspection when your job needs one, and the dates you can be away from home. Your own figure comes from the estimate, after I've been up in your attic, because guessing from the driveway is how people end up paying for the wrong job.
How we install open-cell foam insulation
Before anything is sprayed, I go up and look, because foam laid over a slow roof leak, damp sheathing or old insulation full of droppings hides the problem instead of fixing it. Anything that has to come out comes out first, and a leaking roof gets repaired before we start. Since the foam doesn't stop moisture, we work out how your attic will handle it and write that into the plan before install day. Then we cover what needs protecting, spray the underside of the roof deck all the way out to the edges, where coverage usually runs thin, and trim and clean up. We book the date so your time away covers the spraying, the curing and the cleanup, and I'll tell you when the house is ready for you.
Foam in the attic takes care of the top of the house, but cold floors usually start underneath, where a crawl space vapor barrier keeps damp from the ground out of the crawl space. Property managers call us for commercial insulation too, and I run those jobs in the same order, looking first and planning for moisture before anyone sprays.
Why Santa Rosa homeowners call us for open-cell foam
I look at your attic first
I come out to every job myself before we quote, and I'm on site running our install crew when we spray. Most of what goes wrong with foam starts with something nobody checked, so the looking comes before the price.
Licensed and insured, open since 2023
We're licensed and insured. I started this business in 2023 after years on a municipal crew, where every job had to pass an inspector, so we work in order and write things down.
Santa Rosa permits pulled and inspected
In Santa Rosa only licensed contractors or owner-builders can pull a building permit, and the city reviews applications against the codes, energy efficiency included, then inspects the work. When your job needs one, we apply for it, set up the inspections and give you a copy of the paperwork for your records.
If you're watching the budget, Green House Calls puts in free weatherization and energy saving upgrades for residents of Santa Rosa, Windsor, Sebastopol and other nearby cities, so it's worth seeing what the program covers. When you're ready, have your address, the area you want insulated and a few dates you could be away from home, then call (707) 508-4085 or send us your details.
Get a free on-site estimate for open-cell foam
We reply within one business day to set a time, and then I come out to look at your attic or building myself. The estimate is free and done on site, and there's no obligation to book.
Open-cell spray foam up close
Questions before you book open-cell foam
What is the best way to handle moisture with open-cell spray foam?
Plan for it separately, because open-cell foam stops air at the thicknesses usually sprayed but water vapor can still move through it. That's the big difference from closed-cell foam, the denser kind that blocks moisture too, and it's why your attic's moisture plan isn't left to the foam.
Can I put storage or HVAC equipment in my attic after open-cell foam?
Yes, foam sprayed under the roof sheathing makes an unvented, conditioned attic, so HVAC equipment, storage or even living space sits inside the home's insulated shell. A sealed attic like that needs a way to remove moisture, so how it stays conditioned is settled before we spray, not after.
How long do we have to stay out of the house after spray foam insulation?
Plan to be out from the start of spraying until the foam has cured and the house has been aired out and cleaned. Some foam makers recommend 24 hours after a professional two-part application before anyone moves back in, though that re-entry time, when it's safe to come back, can vary by product. Kids, pets and other trades working on the house all wait it out, so it's easiest to keep other projects off those days.
How much does open-cell foam insulation cost in Santa Rosa?
It usually costs more than blown-in insulation because it seals air and insulates at the same time, and your figure comes from an on-site look at your attic. If your ducts and furnace aren't up there, sealing the gaps and topping up the loose fill usually gets you more for the money, and I'll tell you that at the estimate. When the ductwork does live in the attic, foam is usually worth the extra.
How thick should open-cell spray foam be in an attic?
The depth sets how much insulation you get, because typical open-cell foam has an R-value, a measure of how well it slows heat, of about 3.6 per inch. We agree on the depth with you at the estimate and check it across the whole roof deck as we spray, edges included.
Do I need a permit for spray foam insulation in Santa Rosa?
Santa Rosa requires a building permit unless the California Building Code expressly exempts the work, and the city asks owners to know where they stand before a project starts. I check that for your job when I come out, and if it needs one we take care of the application.
Other work that pairs with spray foam
- Commercial insulation
Property managers with offices, shops or rental buildings can get walls, roofs and ceilings insulated on a schedule planned around tenants and the people who work there.
- Crawl space vapor barrier
If the floors over your crawl space feel cold or the space smells damp, a sealed barrier on the ground keeps soil moisture from rising into the framing.