Wall insulation in Petaluma CA - walls packed tight in older, drafty homes
Cold rooms and outside walls that feel chilly to the touch usually mean empty cavities. We fill them tight so the house holds heat.
Get your cold walls looked at
Call (707) 238-6044 or send the form while the weather's cold, because that's when the empty spots in a wall are easiest to feel and find.
Is it worth insulating the walls of an older Petaluma house?
Wall insulation in Petaluma, for most older homes, means filling the empty cavities inside your outside walls through small holes and then plugging them, so the house holds heat in winter and stays cooler in summer without tearing into drywall or plaster.
A lot of my calls come from older houses where nobody ever put anything in the walls, so you've got rooms that won't warm up, a power bill that jumps every winter and outside walls that feel like a window on a January morning. What moves the price is how much wall we're filling, whether it's wood frame or brick, what we're drilling through on the outside and whether some bays already have old fill in them. The schedule mostly turns on the permit, which we look into for every job and handle when the city wants one. You'll get your own number for your house when I come out and look.
Why Petaluma homeowners call Evergreen about their walls
The owner writes every estimate
I look at your walls and write the estimate myself, then check the finished job with you. So you hear about your house from the person who answers for the work.
A family trade since 2017
I learned this trade handing my dad tools in Petaluma attics and crawl spaces, and I started the business on his methods in 2017. It's why we work in the right order.
Licensed in California, fully insured
California's licensing board treats installing insulation as its own contracting trade, and we're licensed and fully insured. That matters when a crew is drilling into the outside of your house.
What matters most on a wall job is knowing what's already inside before anyone drills, so set up a time for me to come out.
How we do wall insulation in older homes
For older homes with empty walls, the job starts with finding out what's actually in there, because some bays are empty, some got a little loose fill decades ago and some are blocked partway by framing. Then we drill a small hole into each space between the studs, pack the insulation in tight through a hose until the cavity is full top to bottom, and plug the hole. Packing it tight is the whole point, since a half-full cavity just moves the cold spot up the wall. When we fill from the outside, every hole gets sealed so weather stays out, the patches get finished and our crew cleans up the drilling dust before we leave.
A full wall still loses heat if air is slipping around it, so on a lot of older houses we pair this with our air sealing services and close the leaks first, so the new insulation isn't fighting a draft. If your house sits over a basement, basement insulation is its own job, and I'll tell you straight whether it's worth doing now or can wait.
Drill and fill in closed walls
This suits most older wood-frame houses where the drywall or plaster is staying put, because we fill each cavity through a small hole and patch it. It's the least disruptive way to warm up a house you're living in.
Insulating along with new siding
If new siding is already on your list, the outside of the walls will be stripped anyway, which makes it a good time to add insulation there too. If the siding is years off, I'd usually fill the walls now rather than sit in cold rooms waiting.
How can you tell your walls are empty?
Outside walls feel cold
Put your hand on an outside wall on a winter morning, and if it feels a lot colder than an inside wall, the cavity's probably empty. Waiting means heating the outdoors another winter.
A room that won't warm up
A corner bedroom that stays cold with the heat running usually has two empty outside walls working against it. It won't fix itself, and space heaters just add to the power bill.
Drafts at outlets and switches
If you feel air moving at the outlets on an outside wall, the wall's hollow and leaky. That usually calls for sealing along with filling, and it costs you until it's fixed.
Street noise comes right in
Hearing every car and conversation through the walls is a good hint there's nothing in them. Empty cavities carry sound as easily as heat, so the house stays noisy and drafty until they're filled.
What happens when you call us about wall insulation in Petaluma?
Call and book my visit
After you call or send the form, I come out, look at your walls inside and out, and explain what I find in plain words before giving you an estimate.
Sort the permit, then fill
When a permit's needed, Petaluma issues some within days and most in a few weeks or even months, so plan loosely. Then our crew lead and installers fill and plug the walls.
Check the walls with you
Before we call it done, I go over the patched holes and the finished walls with you, and our crew cleans up the drilling dust. Your satisfaction, guaranteed.
Wall insulation questions we hear
These are the questions Petaluma homeowners ask me most about filling their walls. If yours isn't here, call (707) 238-6044 and I'll tell you what I'd look at in your house.
How much does wall insulation cost in Petaluma?
Blown-in insulation in San Francisco usually costs about $3 to $9 per square foot, which is the going rate for that work in the area, not our price. Where your walls land in that range comes down to what I find on the visit, so that's where you'll get a real number. If cost is what's holding you back, Sonoma Clean Power lists PG&E's Energy Saving Assistance Program, which offers a free home assessment with insulation and weatherproofing.
What is the best way to insulate existing walls without tearing them out?
Dense-packed cellulose or fiberglass blown in through small holes is usually the best choice for closed walls in an existing home, because packed that tight it keeps from settling and insulates evenly from top to bottom. When you're comparing quotes, ask each contractor whether they'll dense-pack your walls with one of those two.
Is it worth insulating my walls when I'm getting new siding?
Usually yes, because adding continuous insulation, a solid layer over the outside of the walls, costs only a little more than the siding job by itself. Its energy payback often runs between 5 and 10 years, and you'll notice the house feels warmer and quieter right away.
Who do I ask about a permit for wall insulation in Petaluma?
Ask Petaluma's Building Division, which says its permit list is only partial and answers specific project questions at building@cityofpetaluma.org. When I'm not sure about a job, that's who I ask before we start. Permit or not, the city requires all work to meet the California Building Standards Code and city ordinances.
How do I insulate brick or block walls?
Brick and block walls usually need something other than cellulose, because the cellulose makers' trade group doesn't recommend it for filling masonry wall cavities or walls below ground level. Ask whoever quotes your walls which fill suits them, and if your house is masonry, mention it when you call so I come ready to talk through the choices.
Do we have to leave the house while you insulate the walls?
Usually not, because blown-in fill doesn't have to cure the way spray foam does, so there's no re-entry time to wait out before you use the room again. We do ask that kids and pets stay out of the rooms we're drilling while we work, since there's dust and hose everywhere until we clean up.
Get a wall insulation estimate on site
Tell us your house's age, whether the walls are wood or masonry and any siding plans. We reply within one business day and set a time for me to come out and give you a free estimate, no obligation.
Wall insulation work up close
Other work that pairs with walls
Air sealing services
Gaps around windows, outlets, plumbing and the attic hatch let air slip past even a full wall, so sealing them is often what finally stops the draft.
Learn moreBasement insulation
A cold floor upstairs often starts with bare basement walls below it, and insulating down there can warm the rooms you actually live in.
Learn more