Spray foam insulation
Spray foam suits rooms over the garage and attics where the ductwork lives, because it seals air and insulates in one pass, though it costs more than loose fill.
Insulation Contractor in Santa Rosa, CA - Even Comfort from Attic to Crawl Space
T&S Rohnert Park Spray Foam Insulation is an insulation contractor working in Santa Rosa, CA. We seal attic gaps, top up or replace tired insulation, spray foam where it pays, and insulate crawl spaces under cold floors.
T&S Rohnert Park Spray Foam Insulation handles attic insulation, air sealing, crawl space work and spray foam for Santa Rosa homeowners. Most calls start with a hot room upstairs, a drafty hallway, cold floors or a power bill that keeps creeping up, and we trace it to the attic or crawl space before picking a fix.
Santa Rosa homes and what we find up top
As an insulation contractor based in Rohnert Park, we're a short drive from Santa Rosa, so it's some of the closest work we do, along with Rohnert Park itself and Petaluma to the south. The houses here run from older places with a few tired inches of insulation to newer and rebuilt homes, and each one asks for something different.
The calls sound alike at first. A bedroom that's hot upstairs, the room over the garage that never feels right, a drafty hallway, floors that are cold underfoot. The cause varies a lot, so I climb into the attic and look under the house before suggesting anything, because the fix for a thin attic isn't the fix for a leaky one.
- Based in
- Rohnert Park, CA 94928
- Hours
- Mon–Fri: 6 AM–10 PM, Sat–Sun: 8 AM–10 PM
Insulation work we do in Santa Rosa
Attic insulation
Hot upstairs bedrooms usually point to a thin attic. We check how many inches are already up there and bring the edges up as deep as the middle.
Blown-in insulation
Blown-in insulation, loose fill blown through a hose, is the usual way we top up an older attic once the gaps underneath have been sealed.
Home insulation
When several rooms feel off, we look at the attic, walls and crawl space together so you fix the biggest leak first instead of guessing.
Insulation removal
If the old material is soaked, flattened or full of droppings, we pull it out first, because new insulation over a mess just hides the problem.
Crawl space insulation
Cold floors usually mean the insulation under the house has sagged or fallen. We replace it and fasten it so it stays up against the subfloor.
Wall insulation
Some older walls are empty or close to it. We can fill them through small openings, so a drafty room warms up without tearing out drywall.
Air sealing services
Air sealing, closing the gaps where indoor air slips out, often does more for a drafty room than extra insulation, and it belongs first in line.
Basement insulation
If your house has a basement or below-grade room, we insulate the walls and rim joists, where the floor framing meets the foundation, so it stops feeling clammy.
Closed-cell foam insulation
Closed-cell foam, a dense foam that also blocks moisture, fits crawl space walls and rim joists where damp air is as much the problem as cold.
Open-cell foam insulation
Open-cell foam is softer and lighter than closed-cell and fills odd shapes well, like vaulted ceilings and rooflines where batts never sat right.
Commercial insulation
Offices and small commercial buildings get the same order of work we use in homes, sealing first and insulating second, scheduled around your hours.
Crawl space vapor barrier
A crawl space vapor barrier is a plastic sheet over the dirt under your house that keeps ground moisture away from the framing and the insulation.
Vapor barrier installation
Beyond crawl spaces, we put vapor barriers where moisture would otherwise reach insulation, so it keeps working instead of going damp and flat.
Attic air sealing
Before anything gets blown in, we seal around can lights, pipes, wiring holes and the attic hatch, so the new insulation isn't fighting a draft.
Retrofit insulation
Retrofit work adds insulation to a finished house without opening it up much, which suits older Santa Rosa homes that got by with very little.
Get a free attic and crawl space estimate in Santa Rosa
We reply within one business day to set a time, and I come out to your Santa Rosa home myself to look at the attic and crawl space. The estimate is free, done on site, and there's no obligation to hire us.
(707) 576-6028Permits, licenses and pricing for Santa Rosa jobs
Inside Santa Rosa city limits, the city's Building Division reviews building permit applications and inspects the work, so when an insulation job needs a permit, that review and the inspection visits set the pace more than our crew does. Before you hire anyone, ask for two things, a California license from the Contractors State License Board and an active City of Santa Rosa business license, which the city requires of contractors working inside its limits.
We're licensed and insured. When a job needs a permit, we apply for it, keep you posted and set up the inspections with the city, and if it isn't clear whether one is needed, I check with the Building Division before anyone climbs into your attic. It's the same way we handle jobs in Windsor and the other cities around us.
Price and schedule both turn mostly on the size of the space, how easy it is to reach, and whether old material has to come out before anything new goes in. Any permit review adds to the schedule side. You get your own number from the estimate at your house.
Why Santa Rosa homeowners call us
I started out hauling bags and crawling through attics on a small crew, and the lead I worked under taught me to look at the whole house before selling anybody anything. I still work that way. I come out for every estimate myself, and I'll tell you when your attic just needs the gaps sealed and a top-up instead of a whole new job.
The part that pays off is the part nobody sees, sealing the gaps before insulation covers them and keeping the eave vents clear so the attic can breathe. Our crew does the work, with me on site or one of our lead installers running the day, and I explain what we did up there in plain words.
I opened the business in Rohnert Park in 2021, and our work comes with satisfaction guaranteed. Call (707) 576-6028 or send the contact form and tell me what's bugging you, a hot room upstairs or cold floors.
Fire, rebuild and flood rules that shape the work
A few things about Santa Rosa change how we plan an insulation job here, from the city's fire history to its rebuild and flood rules, plus what we keep finding in older attics.
Wildfire is a yearly concern
The city says Santa Rosa has been hit or threatened by wildfires in neighboring areas every year since 2017. That makes attic vents matter twice over, because they let the attic breathe and they're one of the openings fire-resistant building rules pay attention to. We keep vents clear of insulation, and we don't change or block one without talking it through with you first.
Rebuilding to the current code
The city's guidance on rebuilding a home says every building has to meet the current California residential code as the city has adopted it. New homes in the Wildland-Urban Interface fire area, the city's mapped wildfire zone, also have to meet the state's fire-resistant construction rules, which cover venting, roofing and siding. On a rebuild, we plan the insulation around what your builder puts in.
Floodplain homes and raised floors
The city's rebuild guidance covers flooding too. The city won't permit structures in a floodway, and homes in the 100-year floodplain need their finished floor above that flood level. A raised floor usually means a crawl space underneath, which is where cold floors start, so we insulate under the floor and lay a vapor barrier over the ground to keep moisture out of the framing.
What older attics usually hide
In older Santa Rosa attics we usually find the same handful of problems. Gaps around can lights and pipes were never sealed, eave vents are buried under loose fill so the attic can't breathe, and the insulation sits deep in the middle and thin at the edges. Sometimes the old material is soaked or full of droppings, and that has to come out before anything new goes in.
Questions Santa Rosa homeowners ask about insulation
Do I need a permit for insulation work in Santa Rosa?
The city requires a building permit for work that alters or repairs a building unless the California Building Code expressly exempts it, so don't assume your insulation job is exempt. We confirm it with the city before work starts and handle the permit when one is needed, as described above.
When does an insulation contractor need a California license?
A contractor needs a state license whenever the project needs a building permit, uses employee labor, or comes to $1,000 or more in labor and materials across one or more contracts. A bigger job can't be split into pieces under $1,000 to get around that, and in Santa Rosa only licensed contractors or owner-builders can pull permits.
How much does attic insulation cost in Santa Rosa?
There's no honest single number until someone looks at your attic, because size, access, old material coming out and the amount of air sealing all move the price. Foam costs more and seals air while it insulates, but sealing the gaps and topping up with loose fill usually wins unless your ductwork runs through the attic.
How do I check if my Santa Rosa address is in the WUI fire area?
Use the city's WUI address lookup, which reflects the updated 2026 map boundary and is meant for city residents. If you live in the county but inside the city's WUI area, the County of Sonoma is the office to contact for the requirements that apply to you.
Do we have to leave the house during spray foam insulation?
Yes, with spray foam you, the kids and the pets stay out until the re-entry time, the point the foam maker says it's fine to come back in, has passed. With blown-in loose fill, most families stay home and just keep clear of the hatch and the rooms we're working through. I go over which applies at the estimate.
How long will an insulation crew be in my attic?
A simple top-up over sealed gaps is a much shorter visit than a job where the old insulation has to come out first. Attic size, how tight the access is and how much sealing it needs set the length, and if the job needs a permit, the inspections add their own stops.
How should I get my house ready for attic insulation?
Clear a path to the attic hatch, move anything stored right around it, and box up what's sitting in the attic if you can, so our crew isn't working around it. Tell us about pets and anything fragile in the rooms below, and we'll lay down covers and clean up when we're done.
Tell us what's going on in your attic
Call (707) 576-6028 any day until 10 PM, or describe your planned work on the contact form, since a few lines about which rooms bother you help me know what to look at first.