Insulation Contractor in Santa Rosa - Attics Sealed and Topped Up Right
Evergreen Petaluma Spray Foam Insulation is a Petaluma insulation contractor that seals and insulates attics, crawl spaces and walls in Santa Rosa homes, from older drafty houses to newer builds, and removes old insulation that's past saving.
- Licensed and fully insured.
- Free quotes on site.
- Expect a reply within 1 business day.
Insulating Santa Rosa houses, old and new
Santa Rosa is the biggest city we work in, just up the road from home base in Petaluma, and the houses there run the whole range. One day it's a bungalow near downtown with a few gray inches of old fill in the attic. The next it's a two-story tract house where the room over the garage never feels right, or a newer place with a crawl space nobody finished. Our crew does the same work in Rohnert Park on the way up and in Novato to the south, so what we find in Santa Rosa isn't new to us.
The age of the house decides where we start. An older place usually needs its gaps sealed and its old insulation checked before anything new goes in, while a newer home is more often a matter of finishing what the builder skipped.
What we do for Santa Rosa homes
Attic insulation
Many Santa Rosa attics still hold a few thin inches from the original build. We seal gaps, then bring the attic insulation up evenly, edges included.
Attic air sealing
Older houses here leak air around can lights, pipes and the attic hatch. We close those gaps before any insulation goes in, so it isn't fighting a draft.
Insulation removal
Old attic fill is often stained by roof leaks or full of droppings. We take it out first, since new material over that keeps the problem.
Crawl space insulation
Raised-floor houses in Santa Rosa get cold floors when the crawl space is bare. We fit insulation between the floor joists and hold it snug so it stays up.
Wall insulation
Some older homes here have empty wall cavities, which is why one room never warms up. We blow insulation in through small holes and patch them after.
Spray foam insulation
The room over the garage is exposed on more sides than the rest of the house. We often spray foam there, since it seals and insulates at once.
What Santa Rosa houses usually need
Most of our Santa Rosa calls start with a drafty older house, a hot upstairs or a power bill that keeps climbing. When I get up into those attics I usually find what my dad used to point out with his flashlight: insulation piled deep in the middle and thin at the edges where the roof meets the walls, eave vents buried so the attic can't breathe, and old fill that's been rained on or moved into by mice. We take out what's ruined, set baffles, short chutes that hold insulation back from the vents, and then blow in loose fill evenly all the way out, because the edges are where the heat gets away.
Fire weighs on everybody here. Wildfires in neighboring areas have hit or threatened Santa Rosa every year since 2017, so we see rebuilt homes alongside older ones, and plenty of owners who'd like less smoke drifting in. Sealing the attic and crawl space won't make a house smoke-proof, but it closes the gaps that pull outside air through the house, and it's the first thing we do anyway.
Get a free on-site insulation estimate for your Santa Rosa home
Tell us what's going on with your Santa Rosa house, whether it's a hot room, cold floors or an attic you haven't looked at in years, and we'll reply within one business day to set a time. I come out myself, look at the attic and crawl space and write your estimate, free and with no obligation. If you go ahead, our crew lead and installers do the work, and I check it with you at the end.
Santa Rosa insulation questions
These are the questions Santa Rosa homeowners ask us most, answered straight. If your house doesn't fit any of them, call or send the form and tell me what's going on.
Do I need a permit to add insulation to my house in Santa Rosa?
It can, because the City of Santa Rosa requires a building permit for work that alters or repairs a building unless the state building code expressly exempts it. The city asks owners to learn their permit obligations before starting, so we find out what the city wants for your job and handle the permit when one is needed. If we're not sure, we ask the city's building office before we start.
When does an insulation contractor need a California license?
In California, a contractor needs a Contractors State License Board license when the job needs a building permit, uses employees, or comes to $1,000 or more in labor and materials, and a bigger job can't be split into smaller pieces to get under that line. In Santa Rosa, only licensed contractors or owner-builders can pull a building permit, and contractors working inside city limits also need an active city business license. We're licensed and fully insured, and it's fair to ask any contractor about all of it before you hire them.
How do I check if my Santa Rosa address is in the wildfire area?
Use the city's Wildland-Urban Interface address lookup, which uses the city's updated map boundary and is meant for city residents. If you live in the county but inside the city's fire area line, the County of Sonoma tells you what applies to you. It matters most when you're rebuilding or adding on, because new construction in that area has to meet the state's fire rules for venting, roofing and siding, and attic and crawl space vents are where our work meets those rules.
How much does insulation cost for a Santa Rosa home?
Your price comes down to what's already in your attic or crawl space and what has to happen before new insulation goes in, and I work that out on site and write it up as your estimate. Soaked or droppings-filled material has to come out first, a tight attic with a small hatch slows everything down, and lots of gaps mean more sealing. Foam costs more because it seals and insulates at once, so I only push it when your ductwork lives in the attic, and otherwise sealing the gaps and topping up loose fill usually gets you further for the money.
How long does attic insulation take, and when can we go back inside?
How long we're in your attic turns on its size, how much old insulation comes out and how many gaps need sealing, and I'll talk it through with you when I come out to look. With loose fill you can usually stay home while we work, though the hallway under the hatch gets busy. Spray foam means everybody, kids and pets included, stays out until the foam maker's re-entry time has passed, which is when it's safe to come back, and I'll tell you that time for the product before we book the day.
What causes a hot upstairs or cold floors in an older Santa Rosa house?
Usually it's air leaking through gaps in the attic or crawl space, more than a shortage of insulation. Warm air slips out around can lights, pipes and the attic hatch, and a bare crawl space leaves the floor above it cold no matter how high you turn the heat. I'll show you where it's happening when I'm up there, and sometimes the honest answer is sealing a handful of gaps now and letting the rest wait.
Insulation work, up close
Other cities we work in
We work in the cities around Petaluma, so check the list for yours, or call (707) 238-6044 and tell us where your house is.