Insulation Contractor in Sonoma, CA - Fewer Drafts in Older Homes and Attics
D&R Santa Rosa Spray Foam Insulation is an insulation contractor based in Santa Rosa, CA. We insulate and air seal attics, crawl spaces and walls in Sonoma homes and small commercial buildings.
- Licensed and insured.
- Free on-site estimates.
- We respond within 1 business day.
Older homes and small shops around Sonoma
We're based in Santa Rosa and come over to Sonoma for insulation work, the same as we do for Calistoga and Petaluma. In Sonoma our calls come from older houses close to the center of the city, mid-century ranch homes, newer houses toward the edges, and the shops, offices and rentals downtown.
Most people call about a drafty room, a hot upstairs or a power bill that keeps climbing. With that mix of houses, some jobs are a straight top-up over a newer ceiling, and others start with a careful look through a tight, older attic.
Our services in Sonoma, CA
- Attic insulation
Many attics we open in Sonoma hold only a few inches of old, settled material. We measure what's there, then add more to an even depth all the way to the edges.
- Attic air sealing
Drafty rooms usually start with air slipping up into the attic. We seal those openings before any insulation goes down, because that order is far easier than undoing it later.
- Insulation removal
Old attic material that got soaked or filled with droppings shouldn't stay under anything new. We pull it out and clean up first, so the problem doesn't stay with the house.
- Open-cell foam insulation
If your ducts run through the attic, open-cell foam insulation sprayed under the roof seals and insulates at once. It costs more, so we suggest it mainly when ducts live up there.
- Retrofit insulation
Older Sonoma houses often have walls with little inside them. We blow insulation into those closed walls through small holes where the cavities allow, instead of opening them up.
- Commercial insulation
Shops, offices and rentals around downtown Sonoma need work planned around tenants and customers. We set the order of work with the property manager and keep each space clean.
What older Sonoma houses ask of an attic
In the older houses we see around Sonoma, the first question is what's already in the attic. It's often a few inches laid decades ago and added to since, sometimes piled deep in the middle and thin at the edges, which is backward, or packed over the eave vents so the attic can't breathe and moisture starts showing in the framing. I check the depth, the condition and the vents before I quote, because new insulation laid over a hidden problem is a pain to undo.
Price and schedule move with the same things here: how big the attic is and how easy it is to reach, whether old material has to come out first, and whether the house needs foam or a top-up of loose fill. I look at all of that in person, so your estimate shows what you're paying for and roughly how the job will run.
Get a free on-site insulation estimate in Sonoma
Send the form or call (707) 508-4085, and we'll reply within one business day. I come out to your Sonoma home or building myself, look at the attic or crawl space and answer your questions. Then you get an estimate, free and with no obligation.
Insulation work up close
Sonoma insulation questions answered
Do I need a permit to insulate my attic in Sonoma, CA?
The city's permit guidance doesn't settle it for insulation, so it's worth checking with the City of Sonoma's Building Division before work starts. The city's handout says the building official issues permits for most construction and repair, naming electrical, plumbing, mechanical, grading and demolition work, and the Division takes questions at Building@sonomacity.org. When a job does need a permit, we apply for it, set up the inspections and give you a copy of the paperwork.
When does a contractor need a California state license for insulation work?
A contractor needs a license from the Contractors State License Board when the job needs a building permit, uses any additional workers, or comes to $1,000 or more in labor and materials. A bigger job can't be split into pieces under $1,000 to get around that rule. We're licensed and insured, and you're welcome to ask about it at the estimate.
Do contractors working in Sonoma need a city business license?
Yes, the city requires every business operating within city limits to file a business license each year, and that includes contractors, subcontractors and sole proprietors. Licenses run by the calendar year, so it's fair to ask anyone you hire whether theirs is current.
How much does attic insulation cost in Sonoma?
Your cost comes down mostly to which material your house needs, and I give you the figure after I've seen the attic. Sealing the gaps and topping up loose fill usually costs less than spray foam and usually does the job, unless the ductwork runs through the attic. If old material has to come out first, that adds to the price, but it's cheaper than covering a problem you'll pay to dig back out.
How long does attic insulation take, and when can my family go back inside?
The time on site turns on the attic's size and whether old material comes out first, so I give you the timing for your house at the estimate. With blown-in insulation, loose fill blown through a hose, you usually don't need to leave. Spray foam has a re-entry time, the stretch before people and pets can come back in, and we'll tell you that and plan the day around it before we start.
What causes a hot upstairs or drafty rooms in an older Sonoma house?
Usually it's air leaking through gaps around can lights, pipes and the attic hatch, more than a shortage of insulation. Insulation laid over those gaps just fights the draft, so we do the air sealing first, closing the gaps, and then add insulation on top.