Insulation contractor in Petaluma, CA - warmer floors and cooler upstairs rooms
D&R Santa Rosa Spray Foam Insulation insulates attics, crawl spaces and walls in Petaluma homes and commercial buildings, clearing out old material, sealing air leaks and adding foam or loose fill where each one fits.
- Licensed and insured.
- Free on-site estimates.
- We respond within 1 business day.
Houses and commercial buildings across Petaluma
Petaluma is an easy drive down Highway 101 from Santa Rosa, where we're based, and we work across the city, from the older houses on the west side and around downtown to the newer neighborhoods east of the freeway, along with the commercial buildings property managers call us about. The same road takes us through Cotati on the way down and on to Novato, where we do the same kind of work.
That range is why I look before I quote. Two Petaluma houses a mile apart can need very different work, one starting under the floor and the other in a single room upstairs.
Our services in Petaluma, CA
- Attic insulation
Many Petaluma attics hold a few inches of old, packed-down insulation, so the rooms below run hot. We seal the gaps, then build attic insulation up evenly to the edges.
- Insulation removal
Older Petaluma attics sometimes hold insulation soaked by an old leak or fouled by rodents. We remove it first, since new material on top just keeps the problem.
- Attic air sealing
Gaps around can lights, pipes and the attic hatch are behind most drafty Petaluma upstairs rooms. We close them before insulating, so the new layer isn't fighting a draft.
- Crawl space insulation
Raised-floor houses on Petaluma's west side often have bare crawl spaces, which is where cold floors come from. We insulate between the floor joists and seal the gaps underneath.
- Wall insulation
Many older Petaluma houses have empty wall cavities, so the rooms never quite hold heat. We fill the walls through small holes and patch them afterward.
- Spray foam insulation
In Petaluma's newer neighborhoods, the room over the garage is the usual call. Spray foam often fits there, because it seals air and insulates in one pass.
What Petaluma fog and wind do to an attic
Most of the year a Petaluma house gets cool, damp mornings, warmer afternoons and a steady afternoon wind, so the attic swings in temperature far more than the rooms below and drafts show up on breezy days. We start with the air leaks, then add insulation and keep the eave vents clear, the openings at the roof edge that let the attic breathe, because damp air with nowhere to go ends up in the framing.
The older houses on the west side and around downtown have usually had a few rounds of work, so before we add anything I check how many inches are up there, whether any of it got wet or dirty and what's going on in the crawl space. Price turns mostly on how much has to come out, how much sealing the house needs and how easy the space is to reach, and the schedule turns on that same prep and on whether a permit is involved. The on-site estimate is where you get your own figure.
Get a free on-site insulation estimate in Petaluma
We reply to every call and request within one business day to set up a visit. I come out to your Petaluma house or building myself, look over the attic, walls and crawl space, and walk you through what I'd do, with no obligation.
Insulation work up close
Petaluma insulation questions answered
Do I need a permit to insulate my attic in Petaluma?
The City of Petaluma is the one to confirm that, because its permit list names work like water heaters, solar panels, decks, additions and renovations but doesn't call out insulation by itself. Building questions go to building@cityofpetaluma.org, and applications are filed online through the city's Permits & Planning Hub. When a job does need one, we apply for it, set up the inspections and give you a copy of the paperwork for your records.
How long does it take to get a building permit in Petaluma?
Most Petaluma permits take a few weeks to several months, though some are issued over the counter or within a few days. Fees are set to cover the city's cost of processing and inspection, and they're either flat or based on what the project costs to complete. When a permit is needed, it can push the start date, so we talk it through at the estimate.
Does a contractor based outside Petaluma need a city business license?
Yes. The city's business license instructions have a business based outside Petaluma fill out the application and pay the city's business tax, which for contractors is based on the previous year's gross receipts in Petaluma, with a $49.00 minimum. The application also asks for the contractor's state license number and its expiration date, and since those instructions aren't dated, the city has the current figures.
How much does it cost to insulate an attic in Petaluma?
The cost comes from your attic, mainly its size, how many inches are already up there and whether any old material has to come out first. Air sealing, a tight space that's hard to reach and choosing spray foam over blown-in loose fill all add to it, while topping up clean existing insulation keeps it down. I give you a figure after I've looked, and I'll walk you through what each part of it pays for.
Do I need a vapor barrier in my Petaluma crawl space?
Usually yes, when the dirt under the house stays damp through the wet months, because that moisture rises into the floor framing and any insulation between the joists. A vapor barrier is heavy plastic laid over the ground, and we put it down after checking for standing water or a drainage problem that needs fixing first. If your crawl space is dry, I'll tell you so.
What is the best way to insulate a Petaluma attic with ductwork in it?
If your heating and cooling ducts run through the attic, spray foam on the underside of the roof is usually worth its higher cost, because it seals the air and puts the ducts inside the insulated part of the house. Without ducts up there, sealing the gaps and topping up loose fill usually wins on cost. Many newer Petaluma houses have their ducts in the attic, so that's one of the first things I check.