Spray foam insulation
Spray foam insulates and seals air in one coat, so it fits rooflines, rim joists and tight spots loose fill can't reach. It costs more, so we use it where it earns that.
Insulation Contractor in Sonoma, CA - Comfortable Rooms in Older Homes
T&S Rohnert Park Spray Foam Insulation is an insulation contractor working in Sonoma, CA. We seal the gaps in your attic and crawl space, then insulate them, so drafty rooms and a hot upstairs finally settle down.
In Sonoma, we handle attic and crawl space insulation, air sealing, insulation removal and spray foam, mostly for homeowners dealing with drafty rooms, cold floors or a power bill that keeps climbing. T&S Rohnert Park Spray Foam Insulation is an insulation contractor in Rohnert Park, CA, and I come out to look at every job myself.
Insulation work we do in Sonoma homes
A lot of the calls we get from Sonoma start the same way. One bedroom never warms up, the room over the garage bakes by afternoon, or the floors feel cold under bare feet. Most of the time the cause is up in the attic or down in the crawl space, where old insulation has settled thin and the gaps around it were never sealed.
First I look at what's up there: how many inches are left, whether it's stained or full of droppings, and whether the eave vents are still open. A lot of attics here are tight, so I crawl out to the edges, where coverage usually runs thinnest. It's the same check we do on attics in Petaluma and Santa Rosa.
- Based in
- Rohnert Park, CA 94928
- Hours
- Mon–Fri: 6 AM–10 PM, Sat–Sun: 8 AM–10 PM
Insulation services for Sonoma houses and businesses
Attic insulation
When the upstairs is hot by afternoon, the attic is usually short on insulation. We seal the gaps first, then bring it up to an even depth, edges included.
Blown-in insulation
Blown-in insulation is loose fill we blow through a hose, so it tops up a thin attic and packs in around wiring and framing. It suits most older attics we open here.
Home insulation
If a few rooms run hot or cold and you're not sure why, we look at the attic, walls and crawl space together and fix them in the right order.
Insulation removal
Old insulation that's been soaked, flattened or full of droppings has to come out before anything new goes in, or the smell and the problem stay under the new layer.
Crawl space insulation
Cold floors in winter usually mean the crawl space under the house has little insulation left. We fit it snug between the floor joists and keep it from sagging.
Wall insulation
Older walls are often empty, which is why an outside wall feels cold to your hand. We can usually fill them without opening up the inside finish.
Air sealing services
Air sealing means closing the gaps where outside air slips in, around pipes, wiring, ducts and the rim of the house. It's often the least expensive fix for a drafty room.
Basement insulation
If your house has a basement or a lower room set into the ground, it's often the chilliest spot you've got. We insulate the walls so you'll actually use it.
Closed-cell foam insulation
Closed-cell foam is a dense foam that blocks moisture as well as air, so we use it where dampness is a worry, like crawl space walls and rim joists.
Open-cell foam insulation
Open-cell foam is softer and lighter, and it fills odd roof cavities and the room over the garage well. It costs less than closed-cell where moisture isn't the issue.
Commercial insulation
Shops, offices and small commercial spaces in Sonoma get the same seal-then-insulate order we use in homes, scheduled so the work gets in your way as little as we can manage.
Crawl space vapor barrier
A torn or missing plastic sheet over the crawl space dirt lets ground moisture rise into the floor framing. We lay a new vapor barrier and seal the seams.
Vapor barrier installation
Where moisture moves into insulated walls or ceilings, a vapor barrier keeps the insulation dry and doing its job. We'll tell you plainly whether your house needs one.
Attic air sealing
Before any insulation goes down, we seal the attic floor around can lights, plumbing vents, wire holes and the hatch, the work nobody sees once it's covered.
Retrofit insulation
Retrofit work adds insulation to a finished house without a remodel, filling the walls, attics and floors you live with every day. It suits homes built with very little.
Get a free on-site insulation estimate in Sonoma
Send us a few details about your Sonoma home and we'll reply within one business day to set a time. I come out myself, look at your attic and crawl space, and give you a free estimate on site with no obligation.
(707) 576-6028What to know before insulation work in Sonoma
Inside Sonoma city limits, permits come from the city's Building Division, where the building official issues them for most construction and repair. The city's handout names electrical, plumbing, mechanical, grading and demolition work among those, so if it's unclear whether your insulation job needs one, we check with the Building Division before we start. When a permit is needed, we apply, keep you posted and set up the inspections, and those dates help set the schedule.
Two licenses are worth checking before you hire anyone for this work: a California contractor license from the state licensing board, and a business license from the city. I've explained when each one applies in the questions below, and it's fair to ask any contractor to show you both.
The price moves with the size of your attic or crawl space, how easy it is to get into, how many inches are already up there, how many gaps need sealing, and whether old insulation has to come out first. Removal and any inspection add steps to the schedule. Your own number comes from the on-site estimate, the same way we price jobs in Rohnert Park and down in Corte Madera.
How we handle your attic, start to finish
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've run this business out of Rohnert Park since 2021, and I still come out for every estimate myself, so the person who looks at your attic is the one answering for it.
Our crew does the work, with me on site or one of our lead installers running the day. We seal the gaps around lights, pipes and the hatch before insulation covers them, keep the eave vents clear so the attic can breathe, and build the depth out to the edges instead of piling it up in the middle.
We're licensed and insured, satisfaction guaranteed, and if something up there isn't worth your money, I'll say so before you spend it. When you're ready, call (707) 576-6028 or send a note through the contact form, and I'll come out and take a look.
Sonoma rules and houses that shape the job
A few city rules and a few things about the houses here change how an insulation job goes in Sonoma. These are the ones we plan around.
Small patches after wall work
When we insulate walls, we sometimes open small sections of drywall or siding to reach the cavities. The city's handout exempts in-kind repair or replacement of less than 32 square feet of drywall, siding, stucco or roofing in any 12-month period, though that work still has to meet state regulations and the city's code. That covers the patch, not the whole job, so we still check the rest.
Planning around a new roof
The city's handout lists a reroof, or a change in roof slope, as work that needs a permit. If you've got a roofer lined up, it's worth having us look at the attic in the same season, so any changes to roof vents still line up with clear eaves below and nobody covers work the other trade needs to see.
Getting answers from the city
The Building Division takes questions by email at Building@sonomacity.org, and its office is open Monday through Thursday, 8 a.m. to 5 p.m., with Fridays by appointment. A question sent late in the week may not get answered until the next one, so when a permit question comes up on your job, we send it early and plan the start around the answer.
Older houses, older attics
Many houses we work on here have decades behind them, and the age of a house tells me a lot before I climb up. Older homes often have packed-down insulation, open gaps around can lights and old wiring, and walls with little or nothing inside. If you know roughly when your house was built or what's been done since, tell me at the estimate, because it helps me plan.
Questions Sonoma homeowners ask about insulation
How much does attic insulation cost in Sonoma?
There's no honest number until I've been up in your attic, because the biggest costs are things you can't see from the hallway. Sealing the gaps and topping up with loose fill usually costs less than spray foam, and pulling out soaked or dirty insulation adds labor and disposal. I come out for every estimate myself and go over your number on site.
When does a contractor need a California license for insulation work?
A contractor needs a license from the California Contractors State License Board when the job needs a building permit, uses any additional workers, or totals $1,000 or more in labor and materials. A larger project can't be split into smaller pieces to stay under that $1,000 mark. It's fair to ask for the license number before anyone starts.
Do contractors working in Sonoma need a city business license?
Yes, the City of Sonoma requires every business working inside city limits to file a business license each year, and that includes subcontractors, independent contractors and sole proprietors. The license runs January 1 through December 31, and a new business pays before it starts working. It's a reasonable thing to ask about when you're comparing bids.
How long will an insulation crew be in my attic?
That mostly comes down to whether the old insulation has to come out and how many gaps need sealing before anything new goes down. A clean attic that only needs a top-up is a shorter visit than one we have to empty first. I'll walk you through the plan for your house at the estimate, so you know what each day looks like.
Do we have to leave the house when you install spray foam?
Usually yes, everyone in the house, kids and pets included, stays out until the re-entry time the foam maker sets, which is the wait before it's safe to come back inside. We go over that time with you before the job. Blown-in work doesn't usually mean leaving, though we close off the hatch area and keep the dust down.
Is spray foam or blown-in insulation better for my attic?
For most attics I'd pick sealing the gaps and topping up with blown-in, because it does the job for less money. Spray foam costs more but seals air while it insulates, so it earns its price when your ductwork runs through the attic. I'll look at where your ducts are and tell you which way I'd go.
How do I get my house ready for attic insulation?
Clear a path to the attic hatch and move anything stored right below it, because we'll be carrying hose and material through there. If you keep boxes in the attic, pull out what you can so we can reach the edges and seal around them. Let us know about pets, and we'll go over the rest at the estimate.
Tell us what's going on upstairs
We take calls until 10 PM every day, so call (707) 576-6028 or send the form tonight while that cold room is fresh in your mind.