Closed-cell foam insulation in Lakeville MN - basement walls that stay warm and dry
Cold floors or a damp, drafty basement edge? Dense foam sprayed in seals the gaps and holds back heat and moisture at once.
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Is closed-cell spray foam right for my Lakeville house?
Closed-cell foam insulation is a dense spray foam our crew applies in Lakeville homes to stop drafts, slow heat loss and keep damp out of the wood in one layer, usually on rim joists, basement walls and other spots where cold and moisture get in together. The spraying is only part of the schedule, since your household has to be out of the house while it cures.
Most foam calls I get start with cold floors over the basement, a heating bill that keeps climbing or a corner that always smells a little damp. The price turns on how much area we're covering, how thick the foam goes on, how much old insulation has to come out first and how easy the spot is to reach, and the schedule turns on any repairs that have to happen first and on finding a stretch when your family can be away. We're based in Lakeville and work in many of the cities around it, and sometimes the right answer for a cold room is plain basement insulation or sealing a few gaps rather than foam, so I'll tell you when that's the case. Your estimate lists each step on its own line, so you can see what each part of the job costs.
How we put in closed-cell foam insulation
Closed-cell is the dense, rigid foam I reach for when a spot has to hold back moisture as well as heat, like a rim joist, the band of wood where your floor framing sits on the foundation, or a basement wall. Before anything gets sprayed, I ask at the estimate whether anyone in the house has asthma, skin trouble, breathing allergies or a past reaction to isocyanates, the chemicals in the foam, because those folks should read the product information closely and some do better with a different insulation, and I'd rather sort that out at the kitchen table than after. On the day, our installers clear the area, pull out old batts that have gone damp or dirty so the problem doesn't get sealed in, and spray the foam tight around pipes, wires and vents. At the thickness it usually goes on, about R-6 per inch on the scale that rates how well insulation slows heat, it also stops moisture vapor from passing through, and it's much harder to crush than softer insulation. Then we air the house out and clean up before anyone comes back.
Closed-cell isn't the only foam we spray, and open-cell foam insulation is the softer, lighter option for spots where moisture isn't the main worry. We also put closed-cell into shops, offices and warehouse space as part of our commercial insulation work, since some of our calls come from business owners.
Closed-cell foam insulation and the rules in Lakeville
Lakeville requires a permit to build, alter or repair a building, and the short list of work the city lets go without one names things like cabinets, carpet and wallpaper, not insulation, so whether your foam job needs a permit is a question for the city's building inspections office and not something to guess at. When I'm not sure, I check with them before we start, and when a permit is needed we pull it, sign for it and set up the inspections. The city would rather the contractor sign, because signing puts the contractor on the hook for doing the work to code, and if you sign it yourself, fixing anything that falls short becomes your responsibility.
The state's building rules say closed-cell foam sprayed inside a foundation wall goes right onto the wall, with any framing held off it, so we'd rather spray before a basement gets finished, and I'll flag it at the estimate if studs already sit tight to the wall. We often run into that in Lakeville basements that are halfway to becoming a rec room, and we see the same thing on jobs in Apple Valley and Burnsville.
- Call (651) 268-6023
- Mon–Fri: 7 AM–10 PM, Sat–Sun: 6 AM–11 PM
- Lakeville, MN 55044
What happens after you call about closed-cell foam in Lakeville?
Call or send us a message
Call (651) 268-6023 or fill out the form, and we'll set up a time for me to come out. It helps to tell us which rooms feel cold or damp so I know where to start.
I look and write it up
I come out myself, look at the basement, walls, attic or crawl space you're worried about, answer your questions and write an estimate with each step on its own line. If something has to be fixed first, like a roof leak or water coming through the foundation, I tell you before we schedule.
Our installers spray the foam
Our installers clear the work area, spray the foam and leave the house to air out while your family stays somewhere else. We pick the day together, so the time away lands when it works for you.
We walk through it together
Once the house has been aired out and cleaned, I walk through the finished work with you and answer anything still on your mind. Satisfaction guaranteed, so if something doesn't look right, that's the time to say it.
Why Lakeville homeowners call us for closed-cell foam
Both rim joist methods explained
Minnesota's guidance on basements gives two sound ways to insulate a rim joist, rigid foam board cut to fit and sealed at the edges and around pipes, wires and vents, or spray foam. I go over both with you, because careful board work can sometimes do what you were about to pay foam prices for.
The same person, start to finish
I come out myself to look at the house and write the estimate, our installers do the spraying, and I check the finished work with you. You won't be explaining your house to someone new at every step.
Sold insulation before installing it
I spent a few years selling insulation at kitchen tables before learning the trade in attics and basements, and I started this business in 2017. I know how a bigger job gets pushed, so if a smaller job fixes your problem, that's the one I'll write up.
Licensed and insured for foam work
We're licensed and insured. Foam work happens inside your house with chemicals and spray equipment, so it's worth knowing the crew is covered before anyone sets foot in the basement.
Foam doesn't come off easily once it's on, so the time to ask every question is before we spray. Send us a message or call (651) 268-6023 and tell me what's going on in the house.
Request an estimateGet a free closed-cell foam estimate for your house
Send the form and we'll get back to you within one business day to set a time. I come out for a free on-site estimate with no obligation, look at where you want foam, go over any health concerns in the household and write up each step on its own line.
- Licensed and insured.
- Phone
- (651) 268-6023
- Location
- Lakeville, MN 55044
- Hours
- Mon–Fri: 7 AM–10 PM, Sat–Sun: 6 AM–11 PM
Questions about closed-cell foam in Lakeville
How much does closed-cell spray foam insulation cost in Lakeville MN?
Spray foam insulation in the Minneapolis area usually runs about $2,800 to $11,000 per job, and that range covers spray foam of any kind, not closed-cell alone. Where your job lands depends on the area, the thickness and the prep work, and your estimate shows each step as its own line.
How long do we have to stay out of the house after spray foam insulation?
Plan on at least 24 hours away after spraying, which is what federal safety guidance tells residents. The re-entry time, the wait before you can come home, can run longer depending on the product, the house and whether young kids or older relatives live there, and it isn't over until the foam has cured and the house has been aired out and cleaned. Bring the pets with you and line up a place to stay before spray day.
Does an insulation contractor need a state license in Minnesota?
Not always, because Minnesota requires a state license only from a residential contractor who offers more than one of its listed special skills, and it files insulation and vapor barriers under one of them, interior finishing. That means an installer who does nothing but insulation can work without one, so it's fair to ask anyone you're considering what they hold and whether they carry insurance.
What is the difference between closed-cell and open-cell spray foam?
Closed-cell is denser and blocks moisture vapor at its usual thickness, while open-cell is softer and can need an added layer to control moisture and condensation. Building science guidance says both give acceptable results on rim joists, so the choice usually comes down to how damp the spot runs and what else is going on in that part of the house.
What causes a cold, damp rim joist in the basement?
Usually it's outside air slipping in through gaps where the wood meets the foundation and around pipes and wires, and when that cold air meets warm, humid house air, water can settle on the wood. Sealing those gaps is what keeps moisture from damaging the framing, which is why we give the edges as much attention as the middle.
Should I spray foam my attic or just add more blown-in insulation?
For most attics, sealing the gaps and topping up the blown-in, the loose fill sprayed in through a hose, does the job for less money than foam. Foam seals air while it insulates, so it starts to make sense when your heating and cooling ductwork runs through the attic, and I'll tell you at the estimate which way your house leans.
Other foam work we do
Open-cell foam insulation
A lighter foam that fills odd-shaped cavities and quiets noise, worth a look where damp isn't the problem.
Commercial insulation
For a shop, office or rental space that's costing too much to heat or picking up moisture along the walls.
Schedule your closed-cell foam estimate
Have a list of the cold or damp spots you'd like foamed, like rim joists or foundation walls, and any breathing concerns in the house, so one visit covers everything.
Request an estimateCall (651) 268-6023