Insulation Contractor in Sebastopol, CA - Warmer Floors and Cooler Rooms Upstairs
H&M Windsor Spray Foam Insulation is an insulation contractor working in Sebastopol, CA. We insulate and air seal attics, crawl spaces and walls, and remove old insulation that's gone bad, so the house holds its heat.
- Licensed and insured.
- Free quotes on site.
- We reply within 1 business day.
Sebastopol houses and what they need from insulation
The short answer: H&M Windsor Spray Foam Insulation does insulation work in Sebastopol from our base in Windsor, in attics, crawl spaces and walls. I come out to look before anyone talks numbers, because a call about cold floors or a hot room upstairs usually has a cause you can only find in the attic or under the house.
Most of our Sebastopol work is in houses, from small older places near downtown to homes on bigger lots toward the edges of the city, with the odd shop or office in between. It's much the same mix we see next door in Santa Rosa.
Plenty of houses here have been added onto over the years, so one roof can hide two or three separate attic spaces, and the floor can sit over a crawl space on one side and a slab on the other. The insulation in the old part and the new part is rarely the same, so I go into every space before I write anything, because the fix for each one is usually different.
Why Sebastopol houses get cold floors and hot rooms
A lot of the older houses here sit on raised floors over a crawl space, and when the insulation under the floor has sagged, fallen or was never put in, the floor ends up about as cold as the air under the house. We check what's down there, lay a vapor barrier over the dirt when the crawl space needs one, and put insulation back snug against the floor.
Upstairs, the attic is usually where the heat goes. We often find a few thin inches of settled insulation and open gaps around everything that comes through the ceiling, so the rooms up top get hot and the heat you pay for slips out. We close those gaps and build the insulation back up with loose fill, which usually beats foam on cost, unless your ductwork runs through the attic, where foam's air seal is worth paying more for.
Insulation services we offer in Sebastopol
Spray foam insulation
Spray foam fits when ductwork runs through your attic or a room over the garage leaks air everywhere, because it seals and insulates in one pass.
Attic insulation
For a hot upstairs or an attic with a few thin inches left, we seal the gaps, then build it back up evenly, edges included.
Blown-in insulation
Blown-in fill, loose insulation sent up a hose, is usually the best value for topping up an older Sebastopol attic once the air leaks are closed.
Home insulation
When the whole house feels drafty and the power bill keeps climbing, we look at attic, walls and floor together and tell you which to fix first.
Insulation removal
Old insulation that got soaked or filled with droppings comes out before anything new goes in, because covering it over just buries the problem.
Crawl space insulation
Cold floors over a raised foundation usually mean the insulation under the house has sagged or fallen, so we replace it and fasten it snug against the floor.
Wall insulation
Older walls here are often empty or close to it, and we can fill them through small holes from outside or inside without opening up the whole wall.
Air sealing services
Air sealing, closing the gaps around pipes, wires and fixtures, comes before any insulation, and it's often what finally fixes a drafty room.
Basement insulation
If your house has a basement or a room dug into the slope, we insulate its walls so the space is comfortable and the rooms above warm up.
Closed-cell foam insulation
Closed-cell foam, a dense foam that blocks moisture, suits the framing along the edge of the floor and damp spots under the house, where insulation would hold water.
Open-cell foam insulation
Open-cell foam is softer and lighter, a good fit for rooflines and walls you want sealed against air and quieter, where moisture isn't the worry.
Commercial insulation
For shops, offices and studios around Sebastopol, we insulate and seal ceilings and walls and plan the noisy parts of the job around your open hours.
Crawl space vapor barrier
A heavy plastic sheet over the dirt under your house keeps ground moisture out of the floor insulation and the framing, so the crawl space stays drier.
Vapor barrier installation
Where a wall, ceiling or room over the garage needs one, we put the vapor barrier on the right side of the insulation so moisture doesn't get trapped.
Attic air sealing
Before topping up an attic, we seal around can lights, the hatch, pipes and wiring holes, because new insulation can't do its job with air pushing through.
Retrofit insulation
Older houses built with little or no insulation get it added to the walls, floors and attics you have, working around finished rooms instead of opening them up.
Get a free insulation estimate at your Sebastopol house
We reply within one business day to set a time, then I come out to your Sebastopol house, look it over with you and write up the estimate. It's free and done on site, there's no obligation, and the written estimate is yours to think over.
Working in Sebastopol: permits and licenses to know
In Sebastopol, permits come from the city's Building Department at (707) 823-8597, and whether an insulation job needs one is the department's call. When yours does, we take care of the application and set up the inspections, and the schedule then follows those inspections, which is why I talk it through with you at the estimate. Before you hire anyone here, check that their state license is active with the Contractors State License Board and that they hold a Sebastopol city business license, which the city issues to contractors and subcontractors. We're licensed and insured.
What moves the price is what's already in the house: how many inches sit in the attic and what shape they're in, whether old material has to come out first, how much sealing the gaps need, and how easy the attic and crawl space are to reach. The schedule turns on the same things, plus the permit when there is one, and the written estimate is where you'll see your own number. We've been doing this work from Windsor since 2017, and a Sebastopol job gets the same crew and the same order of work as one in Cotati or up in Cloverdale.
How it goes when you call us about a Sebastopol house
Here's how a Sebastopol job runs from your first call to cleanup, and where you'll want to be home for it.
- Step 01
Call or send a request
Call (707) 687-4455 or use the form on this page and tell us what you're noticing, like cold floors or a hot room upstairs. We set a time for me to come out.
- Step 02
Walk the house with me
I look at the attic, the crawl space and the walls with you, explain what I find and tell you what has to be fixed first. You get a written estimate afterward, and nothing is booked until you've read it and said yes.
- Step 03
Our crew does the work
Our install crew does the job with a lead installer on site, and we schedule around any inspections your permit calls for. We keep the noisy parts, like the blower and saws, inside the city's construction hours covered in the questions below.
- Step 04
Final look and cleanup
When the work's done, we clean up, and the lead installer shows you what's in the attic or under the floor now. Satisfaction guaranteed.
Insulation questions from Sebastopol homeowners
Do I need a permit to add insulation in Sebastopol, CA?
Insulation isn't on Sebastopol's list of work exempt from a permit, so don't plan the job on the idea that you can skip one. The city's list of exempt work covers things like painting, tiling, carpeting, cabinets, counter tops and fences up to 7 feet. That list is older than the building code the city uses now, and even exempt work still has to meet code, so we go over your job's permit question at the estimate.
What hours can contractors make noise in Sebastopol?
In Sebastopol, construction noise that would bother a reasonable neighbor in or within 300 feet of a residential zone is limited from 8 p.m. to 7 a.m. on Monday through Thursday nights. On weekends the limits run Friday 8 p.m. to Saturday 8 a.m., Saturday 4 p.m. to Sunday 8 a.m., and Sunday 4 p.m. to Monday 7 a.m., and designated holidays are limited all day. Emergencies and work the City Engineer approves in writing ahead of time are the exceptions, and we plan the loud parts of a job inside those hours.
How much can a contractor ask for as a down payment on a Sebastopol home improvement job?
In California, a contractor can't take a down payment of more than $1,000 on a home improvement job, and on a smaller job the limit drops further because it's also capped at a share of the contract price. After that, the state licensing board says payments are listed in the contract and match the work completed or the materials delivered, and those rules cover every home improvement project.
How much does insulation cost for a house in Sebastopol?
There's no flat price, because the cost comes from what's in your attic and crawl space now, and I give you a figure after I've looked. Removing old insulation that's wet or full of droppings adds to the job, and spray foam costs more than sealing the gaps and topping up with loose fill. One local cost to avoid is starting work before a needed permit, because the city's building code rules add an investigation fee of at least the permit fee and up to five times it, charged even if no permit is issued later.
How long does attic insulation take, and when can my family go back inside?
With loose fill you can usually stay home through the job, while spray foam means everyone, kids and pets included, stays out until the re-entry time, the wait the foam maker sets before you come back in, has passed. How long we're in the attic depends on its size and how much removal and sealing comes first, and I'll tell you what to expect for your house at the estimate.
What is the best way to insulate an older house in Sebastopol?
Do it in this order: clear out bad insulation, seal the air leaks, then add insulation. Fresh material laid over soaked or dropping-filled insulation keeps the problem in the attic, and unsealed gaps let air blow right past whatever you add. We also keep insulation clear of the eave vents and full depth out to the edges, where it's most often thin, so the attic still breathes and the whole ceiling is covered.
Book your Sebastopol insulation estimate today
Call (707) 687-4455 until 10 p.m. on weekdays or 9 p.m. on weekends, or send the request form, and tell us what you're noticing so I know where to look first.