Insulation Contractor in Missoula, MT - Warmer Older Houses, Leaks Sealed First
Summit Missoula Spray Foam Insulation is an insulation contractor based in Missoula. We seal air leaks and insulate attics, walls, crawl spaces and basements, including spray foam, for older houses and small businesses across the city.
Missoula: older houses, long cold winters
Got a back bedroom that never warms up in January, or an upstairs that's hot all summer? That's most of the calls I get in Missoula, usually from people in older houses who are tired of cold rooms and a power bill that climbs every winter. We work inside and outside city limits, from the houses close to downtown to the newer places on the edges, and we do the same work out in Orchard Homes.
A lot of these houses have been added onto over the years, so the attic over the original rooms, the room over the garage and the crawl space under the addition were often insulated at different times, by different people, to different depths. I spent years framing houses before I switched to insulation, so I know where those joins usually hide gaps, and that's where we start, sealing the leaks before we add new insulation.
- Licensed and fully insured.
- Free in-person estimates.
- Replies within 1 business day.
Insulation work we do in Missoula
Attic air sealing
Older attics here leak warm air around can lights, pipes and the hatch. We seal those gaps first, because insulation alone won't stop a draft.
Blown-in insulation
Many attics here have a few thin inches, piled in the middle and bare at the edges. We blow in loose fill evenly and keep eave vents clear.
Spray foam insulation
The room over the garage runs cold because its floor sits over an unheated space. Spray foam insulation seals and insulates that floor in one pass.
Insulation removal
In older houses the old insulation is sometimes soaked from a leak or full of droppings. We pull it out first, because covering it just hides the problem.
Crawl space insulation
Cold floors usually trace back to an uninsulated crawl space, often under an addition. We seal the edges and insulate it so the floor stays warmer.
Retrofit insulation
Many older houses here have walls with little or nothing inside. We fill those spaces through small holes, after checking what's behind the drywall.
Insulating a Missoula house: permits, price and timing
Inside Missoula city limits, building permits come from the city's permit and business licensing coordinators. Their permit list names work like decks, additions, siding and roofing but doesn't spell out insulation, and the city asks people to call 406-552-6630 before starting any work, so for each job I check, tell you what they said and take care of any permit before we start. When a permit is needed, it usually sets the start date. The same coordinators issue city business licenses, so ask any contractor you're considering about theirs. We're licensed and fully insured.
The price mostly comes down to what's already in your attic. How many inches are up there, whether the old insulation is wet or full of droppings and has to come out first, how many gaps need sealing, how easy the hatch is to get through, and whether you go with loose fill or foam all change the number. The schedule turns on the same things plus any permit, and with spray foam you're out of the house until it cures. I come out and look myself, so you get a number for your house, not a guess, and that goes for houses in Orchard Homes and the cities around Missoula too.
Get a free on-site insulation estimate for your Missoula house
We reply to calls and requests within one business day. I come out to your Missoula house myself, look over the attic, walls or crawl space, answer your questions and give you an estimate that's free and comes with no obligation. If you go ahead, I'm on the install alongside our crew.
- Licensed and fully insured.
- Free in-person estimates.
- Replies within 1 business day.
Insulation up close for Missoula homeowners
Missoula insulation questions
Do I need a permit to insulate my attic in Missoula?
The city's permit list doesn't name insulation either way, so we check before each job instead of guessing. If the work adds, replaces or moves a vent or duct, like a bath fan vent we reroute during attic work, the city requires a mechanical permit, and we take care of it before we start.
Who handles insulation permits outside Missoula city limits?
Building outside city limits goes through the Missoula County Building Division, not the city. We work on both sides of the line, so I check with whichever office covers your address and tell you what they say before we start.
How much does it cost to insulate an attic in Missoula?
There's no honest number until I've seen your attic, because the price depends on what's up there now and how much has to happen before new insulation goes in. Pulling out old, wet or dirty material and sealing a lot of gaps add to the job, and foam costs more than loose fill. I'll give you a figure for your house after I look at it on site.
What is the best way to insulate an older house in Missoula?
Seal the air leaks first, then add insulation, starting in the attic. The city's building criteria put Missoula in climate zone 6B, a cold one, so warm air slipping out around lights, pipes and the hatch costs you all winter, and sealing those before topping up loose fill usually beats paying for foam. Foam earns its price when the ductwork runs through the attic, because it seals and insulates around the ducts at once.
Does the January 2027 building code change affect my insulation job in Missoula?
It can if your job needs a permit, because the city asks that work follow the code cycle in effect when the permit application goes in, and a newer cycle takes effect on January 1, 2027. An application submitted before that date follows the current code, and one submitted on or after it follows the new one. If your job needs a permit, I'll tell you which code it falls under.
How long does a building permit stay valid in Missoula?
A city permit becomes invalid if work hasn't started within 180 days of being issued, or if work stops for 180 days once it's begun. If your insulation is part of a bigger remodel, that's the timeline to watch, because a stalled project can run past it.