Spray foam insulation
Spray foam seals air and insulates in one coat, so it suits sloped ceilings and spots where loose fill won't stay put. It costs more, so we save it for places where nothing else works as well.
Insulation Contractor in Petaluma, CA - Cooler Upstairs Rooms and Warmer Floors
Comfort San Rafael Insulation Services is an insulation contractor based in San Rafael, CA, working in Petaluma homes. We seal and insulate attics, crawl spaces and walls, and clear out old insulation that's soaked or worn out.
Comfort San Rafael Insulation Services insulates and seals homes in Petaluma, from the attic down to the crawl space. Most calls here start with a hot upstairs in summer, cold floors in winter or a power bill that keeps climbing. I come out, look at what's already there and tell you what order the work should go in.
What we find in Petaluma attics and crawl spaces
Petaluma has a wide mix of houses, from older homes on raised floors to newer ones that were built with more insulation from the start. The older ones make up most of our calls. Their attics were usually insulated once, a long time ago, and the material has settled since, while the gaps around wires, pipes and light fixtures were never closed.
That's why I start with air sealing, closing those gaps before we add anything, so the new insulation isn't fighting a draft coming up from the rooms below. Then we bring the attic or crawl space up to an even depth. Adding insulation over open gaps is a common reason a house still feels drafty after somebody has already insulated it.
The work here is the same as in the rest of the cities we cover, and so is the order we do it in. A Petaluma attic gets the same inspection, sealing and cleanup as one in San Rafael or down in Kentfield, and I'm on site running the crew either way.
- Based in
- San Rafael, CA 94901
- Hours
- Mon–Sun: 8 AM–9 PM
Insulation services we offer in Petaluma
Attic insulation
Most Petaluma calls end up here. We check how many inches are already up there, seal the gaps, clear the eave vents, then bring the whole attic up evenly, edges included.
Blown-in insulation
Blown-in insulation, loose fill blown through a hose, is how we top up an older attic without tearing anything out. We pay extra attention at the edges, where coverage usually runs thin.
Home insulation
When the whole house feels drafty or the power bill keeps climbing, I look at the attic, walls and floors together and tell you which one to fix first.
Insulation removal
If the old insulation is soaked, flattened or full of droppings, new material on top just buries the problem. We bag it out and clean up before anything new goes in.
Crawl space insulation
Cold floors usually start under the house. We insulate between the floor joists in the crawl space and fasten it so it stays up instead of sagging onto the dirt over time.
Wall insulation
Walls in older houses are often empty. We fill closed walls through small holes and patch them, so a cold outside room warms up without tearing out the plaster or drywall.
Air sealing services
We find where air slips in and out of the whole house, around baseboards, outlets, the floor's edge and the hatch, and close it. That often helps more than extra insulation would.
Basement insulation
If your house has a basement or a lower room partly below ground, we insulate the walls and the rim joist, the band of framing that sits on the foundation, so the floor above stays warmer.
Closed-cell foam insulation
Closed-cell foam, dense foam that also blocks moisture, suits a damp crawl space wall or a rim joist. It costs more, so we use it where loose fill won't do the job.
Open-cell foam insulation
Open-cell foam is softer and lighter, fills odd-shaped cavities well and quiets a room. It lets moisture through, so we keep it away from damp spots like crawl spaces.
Commercial insulation
We also insulate offices, shops and small commercial buildings. I walk the space before writing anything up, because sealing and fixing what's there still comes before adding more.
Crawl space vapor barrier
A heavy plastic sheet over the crawl space dirt keeps ground moisture off the floor framing and insulation. We overlap and seal the seams so the ground stays covered.
Vapor barrier installation
In some walls, floors and ceilings, a vapor barrier keeps moisture out of the insulation. On the wrong side it traps water instead, so we check which side your house needs first.
Attic air sealing
This is sealing the attic floor itself, around can lights, plumbing pipes, wiring holes and the hatch. On many older houses, it's the step that makes the biggest difference upstairs.
Retrofit insulation
Retrofit means adding insulation to a house people already live in, working around boxes, wiring and old material. It's most of what we do and the reason I started this business.
Get a free at-home insulation estimate in Petaluma
Send the form and we'll reply within one business day to set a time. I come out to your Petaluma house myself, look at the attic or crawl space, and write up the estimate there, free and with no obligation.
(628) 234-2144What to know before insulation work in Petaluma
The City of Petaluma issues the building permits here, and when a job needs one, the start date waits on the city's approval rather than on our crew. Before you hire anyone, ask for their state contractor's license number. The city asks contractors for that number and its expiration date on its business license application, and businesses based outside Petaluma still have to apply and pay.
When a job needs a permit, we pull it through the city and set up the inspection, so you aren't the one chasing it. If it isn't clear whether your job needs one, I find out before we start instead of guessing, because finding out halfway through means stopping work with your attic half open.
Petaluma is the north end of where we work, a short run up the highway from Novato. The price for your house mostly follows how much old insulation has to come out, how many gaps need sealing, how big the space is and how easy it is to get into. The schedule turns on that same removal work, plus any permit wait. I put a price on paper only after I've seen the space.
Why we seal before we add insulation
I spent my first years in the trade insulating new houses, where the walls are open and nobody lives there yet. That's where I learned how insulation is supposed to go in. In 2023 I started Comfort San Rafael Insulation Services, an insulation contractor based in San Rafael, CA, to work on houses people already live in, where the attic has old insulation, boxes and a few surprises.
We're best known for fixing and sealing an attic before we add anything to it. If yours has wet or dirty insulation, blocked eave vents or open gaps, I'll tell you, and if adding more wouldn't help yet, I'll say that too instead of selling you the job. I write the estimate myself, and I'm on site running the crew during the install.
We're licensed and insured, and our work is backed by our satisfaction guarantee. If your rooms run hot, your floors run cold or you don't trust what's up in the attic, call (628) 234-2144 or fill out the form on this page, and I'll come out and take a look.
What shapes insulation work in Petaluma homes
These are the four things that shape most of the insulation jobs we do in Petaluma houses, and what each one means for how we go about the work.
Hot bedrooms upstairs
Summers in Petaluma usually run warmer than the southern end of Marin, and a thin attic shows it first in the bedrooms under it. When I go up, I measure how many inches are already there and look at the edges over the outside walls, where coverage is usually thinnest. We seal first, keep the eave vents clear so the attic still breathes, then bring it up evenly, edges included.
Cold floors over a crawl space
A lot of older houses here sit on raised floors over a crawl space, and the floor is only as warm as what's underneath it. We look at the ground first, because insulation fitted above damp dirt pulls in moisture and drops out of place. If the dirt is bare, a vapor barrier usually goes down before we insulate the floor.
The room over the garage
This is usually the hardest room in the house to keep comfortable, because it has outside air on more sides than any other. The garage ceiling under it is often thin or left open around pipes and ducts. We seal those openings and fill the floor between the room and the garage, and if the ceiling slopes, foam is sometimes the only thing that will stay put.
Old insulation you don't trust
Plenty of the attics we open here have insulation that's decades old, flattened, water-stained or full of droppings. Putting fresh material on top hides the problem and leaves it in place. If it's that bad, we take it out first, then seal and reinsulate. If it's just thin but clean, we keep it and add to it, because pulling good material out only adds cost.
Insulation questions we hear from Petaluma homeowners
Do I need a permit to insulate my attic in Petaluma?
The city's permit list doesn't settle it either way. Its examples include water heaters, solar panels, decks, fences, additions, remodels and some electrical or plumbing changes, but not insulation. You can read the list on the city's building permit page or email building@cityofpetaluma.org, and I check for your house before we start.
How long does it take to get a building permit in Petaluma?
Most permits in Petaluma take a few weeks or even several months, though some are issued over the counter or within a few days. Applications go in online through the city's Permits & Planning Hub, and the fee is either flat or based on what the project costs. If your job needs one, we plan the start date around that wait.
How much does attic insulation cost in Petaluma?
I can't give you a fair number until I've seen your attic, because what's already up there decides most of it. Sealing the gaps and topping up with blown-in is usually the better buy on older houses. Spray foam costs more because it seals and insulates in one step, and it's usually worth it only when your ductwork runs through the attic.
How long will the insulation crew be in my attic?
It's usually a shorter job when we're sealing and topping up, and a longer one when old insulation has to come out first. Removal is the slow part, because it gets bagged and carried out before any sealing starts. I'll tell you how long we expect to be at your house when I come out to look.
Do we have to leave the house while you insulate?
For blown-in insulation and air sealing, usually not, though you'll want kids and pets clear of the hatch and the hose. Spray foam is different. The foam maker sets a re-entry time, how long before people and pets can come back inside, and we follow it and tell you the hours before we book the day.
How do I get my house ready for attic insulation?
Clear a path to the attic hatch or crawl space door and move anything stored right around it. If boxes are stored up in the attic, we'll talk about where they go when I come out, because we can't seal or insulate under them. Expect some noise and a hose running through a door or window on install day.
Have us look at your Petaluma attic
We take calls every day from 8 AM to 9 PM, so call (628) 234-2144 or send the form whenever it suits you.