Crawl space insulation in Burnsville MN - warmer floors and drier joists below
Cold floors over the crawl space usually mean winter air is getting under the house. We seal and insulate it so floors stay warmer.

Is it worth insulating my crawl space in Burnsville?
Crawl space insulation in Burnsville seals and insulates the low space under your floor and can close off its outside vents. That makes it less likely that condensation forms on the floor joists, the beams that hold up your floor.
Most crawl space calls start with cold floors, or with a homeowner worried about the furnace or water lines down there every January. In a cold climate like ours, insulating the crawl space can keep the floor warmer and help protect heating equipment and pipes from freezing, so if yours sit under the floor, that's usually the best reason to do it. The price moves with the size of the space, how much old material and stored stuff has to come out, and whether mold or a gas appliance has to be handled first, and those same first steps set the schedule. I'll show you what your space needs, and what it costs, when I come out for the estimate.
What our crawl space insulation work includes
Before we insulate a crawl space, I look for mold and check any furnace down there for its venting and fresh air, because sealing a space around either problem only hides it. Once those are handled, we lay a plastic ground cover across the floor and up the walls so ground moisture stays out of the space. Then we fasten rigid foam board to the walls, which is what keeps the floor above warmer. Most codes require a covering such as drywall over foam, because some foams can give off toxic or flammable gases when heated, though several products are made and tested to cut that risk. Ask which foam board we plan to use and whether it meets code, since that's a fair question for any installer.
A cold floor isn't always the crawl space's doing, so I'll often suggest air sealing services, which close the gaps where outside air leaks in, before or alongside this work. If the rooms above still run cold along the outside walls, wall insulation is the next place I'd look.
Permits and radon for crawl space insulation in Burnsville
The City of Burnsville says permits must be obtained before every project, and its list names roofing, windows, remodels and decks but doesn't mention crawl space insulation, so the list alone doesn't settle whether your job needs one. That's a question for the city, and we ask it before work starts. When a job calls for a permit, we take care of it, and if an inspection is part of it, we set it up and meet the inspector.
Dakota County Public Health recommends testing every home in the county for radon and says the colder months are an especially good time, since heating systems tend to draw radon gas from the soil. A crawl space sits right on that soil, so it's worth knowing where your house stands while you plan this work. We're based in Burnsville and work in many of the cities around it, and the crawl spaces we open up in Apple Valley and Eagan look a lot like the ones here, with furnaces, water lines and stored boxes under the floor. If you're not sure we come to your city, just call and ask.
How a crawl space job goes
Call or send a message
Tell us what you're noticing upstairs and whether a furnace or water heater sits in the crawl space. We'll set a time for me to come take a look.
I look at the space
I check for mold, look at the venting and fresh air for any furnace down there, and note anything that has to be fixed before insulation goes in. You get a price for your crawl space and a plain list of what comes first, so you know what you're paying for.
Clear it, then we install
Moving stored boxes and debris out before we arrive lets the ground cover reach every part of the floor. Our install crew then does the work the way we planned it.
Walk the finished job together
Before we leave, I go through the crawl space with you so you can see the ground cover and the finished walls for yourself. Satisfaction guaranteed on every job.

Get a free estimate for your crawl space
We reply within one business day. I'll come out, look over your crawl space and leave you a free on-site estimate, with no pressure to book.
Common questions about crawl space insulation
How much does crawl space insulation cost near Burnsville?
Crawl space insulation in the Minneapolis area usually costs about $1,700 to $7,700 per job. That's what the work runs across the market, not our price, and where a house lands depends on the size of the space and what has to happen first. I'll give you a figure for your own crawl space after I've seen it.
Do I still need floor insulation if the crawl space walls are insulated?
No, not in a closed crawl space with rigid foam board on the walls, because the wall foam gives the floor above the protection it needs. That's why we put the insulation money on the walls instead of under the floor.
Who can get a Burnsville permit for crawl space insulation?
Burnsville issues residential permits to a licensed contractor, or to a homeowner who owns and lives in the house and is doing the work themselves. When we're doing the job, that means us.
How do I handle mold in my crawl space before insulating?
Have a certified mold remediation expert inspect it and set a cleaning plan before any insulation goes in. If I find surface mold when I come out, I'll tell you, and that step comes before our crew does.
What happens if there's a gas furnace in my crawl space?
Its venting and air supply get checked first, because with a fuel-burning appliance down there that's a life safety step. A natural-draft unit that pulls the air it burns through the foundation vents will need an upgrade, a replacement or a new air supply, so plan for that cost, and I'll tell you at the estimate if yours is one.
How do I keep a sealed crawl space from getting damp?
Give it a way to dry out, and one of the most effective is feeding it a small amount of conditioned air from your heating and cooling system so the space works like part of the house. We plan that with you before the space gets closed up.
Why Burnsville homeowners call Thermal Burnsville Insulation Company for crawl spaces
The owner sees every crawl space
I come out to look at every job and put the estimate together myself. That way your price is based on your crawl space, not a guess over the phone.
In business in Burnsville since 2021
I learned this trade beside my dad in attics and crawl spaces, and I started this business in Burnsville in 2021. If a roof leak or another trade has to come first, I'll tell you before you spend money on insulation.
Licensed and fully insured
We're licensed and fully insured, and the state licensing board requires a license for residential contractors and remodelers who contract with a homeowner for work taking more than one special skill. It's fair to ask any crawl space contractor about both before they start.
On a crawl space, the order of the work matters more than the material, so the first step is me looking at yours. Contact us and we'll set a time.
Work that often goes with a crawl space job
Air sealing services
Closing drafts around pipes, wires and gaps elsewhere in the house can do as much for a cold room as the crawl space does.
Wall insulation
If rooms still feel chilly near the outside walls once the floor is warmer, those walls may be thin on insulation.
Book a look at your crawl space
Call (952) 234-9016, use the contact form or email hi@burnsvilleinsulation.com, and have the rough size of the space, any mold you've seen and any gas appliances down there ready so I can plan the visit.





