Seasoned Insulation Contractor in Sioux City IA - Warmer Rooms and Fewer Drafts Upstairs
Superior Sioux City Insulation Company handles attic insulation in Sioux City and nearby Sergeant Bluff and South Sioux City. We also pull out soiled insulation from attics nobody has checked in years and insulate crawl spaces under cold floors.
- Fully licensed and insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
Who we are
Superior Sioux City Insulation Company is an insulation contractor in Sioux City, IA. I started it in 2023 after my first years in the trade insulating new houses, because lived-in homes with old insulation and hidden leaks are the work I wanted. We're fully licensed and insured, we offer 16 insulation services, and this site covers 5 of the cities we work in across Iowa, Nebraska and South Dakota. You can read more about us and how we work.
Insulation contractor services in Sioux City, IA
Superior Sioux City Insulation Company is an insulation contractor in Sioux City with 16 services for cold rooms, drafty floors and tired attics. Price and schedule mostly turn on what's already up there, what has to come out, how many gaps need sealing and the material you choose, and your free on-site estimate puts all of that in writing.
Spray foam insulation
We spray foam into walls, rooflines and crawl spaces, where it fills gaps and seals air leaks in the same pass as it insulates.
Attic insulation
If your upstairs runs hot in summer and cold in winter, we seal the attic's gaps and build thin insulation back up evenly.
Blown-in insulation
Blown-in insulation is loose fill we blow through a hose, a good fit for topping up attics and reaching tight corners near the eaves.
Home insulation
For homeowners who want the whole house looked at, we check attic, walls, basement and crawl space and insulate where the heat is escaping.
Insulation removal
When old insulation is soaked or full of droppings, we pull it out first, since new material laid over it just hides the problem.
Crawl space insulation
Cold floors over a crawl space usually mean bare or sagging insulation down there, so we seal the openings and insulate it properly.
Wall insulation
We insulate walls in finished, lived-in houses through small holes we patch afterward, so drafty rooms warm up without tearing out drywall.
Air sealing services
Air sealing means closing the gaps around pipes, wires, lights and hatches before insulating, so warm air isn't slipping out past your insulation.
Basement insulation
We insulate basement walls for homeowners finishing a lower level or tired of a chilly basement pulling warmth out of the rooms above.
Closed-cell foam insulation
Closed-cell foam is a dense foam that also blocks moisture, the one we reach for in damp spots like crawl spaces and basement walls.
Open-cell foam insulation
Open-cell foam is softer and lighter, expanding to fill odd cavities and stop air leaks in walls and rooflines that stay dry.
Commercial insulation
We insulate shops, offices and small commercial buildings, planning the work around your business hours so the doors can stay open.
Crawl space vapor barrier
A damp, musty crawl space gets a heavy plastic liner across the dirt floor, sealed at the seams, so ground moisture stays down there.
Vapor barrier installation
We install vapor barriers, sheeting that slows moisture through walls and ceilings, so damp air doesn't soak into new insulation and framing.
Attic air sealing
Before any insulation goes in, we seal around can lights, pipes, wires and the attic hatch, so the new layer isn't fighting a draft.
Retrofit insulation
Retrofit insulation is new insulation added to an older, lived-in house without gutting it, worked in around your family and furniture.
Why Sioux City homeowners call us
Problems fixed before insulation
We fix or flag leaks, wet spots and soiled insulation first, so the insulation you pay for does its job instead of hiding a problem.
We'll say when it isn't ready
If a job isn't ready, I'll tell you, because I'd rather lose a sale than sell you insulation that won't hold up.
Safety checks before we start
We check for old wiring, gas appliances that vent on their own and suspect old insulation, because any of them changes the job.
Care inside a lived-in house
We cover floors, protect your belongings on the way to the attic and work around the people living there, kids and pets included.
We sort out the permit question
We ask the city or county office before work starts and handle any permit the job calls for, so that's off your list.
Even coverage, clear eave vents
We lay insulation as deep at the edges as in the middle and keep eave vents clear, so the attic can still breathe.
Tell us what's going on in your attic or crawl space on our contact page, or call (712) 560-3837.
Tell us what's going on in your house
We reply within one business day to set a time for me to come out. I'll look at the job myself, tell you what I see before I leave and send a written estimate, free and with no obligation.
Cities we work in around Sioux City
Superior Sioux City Insulation Company is based in Sioux City, IA, and works across the cities around it in Iowa, Nebraska and South Dakota. The 5 cities below, including Le Mars and Vermillion, each have their own page, and they aren't the only places we work, so call even if yours isn't listed.
Your insulation questions answered
How much does attic insulation cost in Sioux City?
It depends on your attic, so your number comes from a free on-site estimate, not a phone quote. The biggest swings are old insulation that has to come out, how much sealing the gaps need and how many inches are already up there. I put each of those in writing so you can see where the money goes.
Is spray foam worth the extra cost over blown-in insulation?
For most attics it isn't, because sealing the gaps and topping up with blown-in insulation usually does the job for less. Foam costs more since it seals air while it insulates, and that earns its price when ductwork runs through the attic or in damp spots like crawl spaces.
How long will the insulation crew be at my house, and do we need to leave?
It depends on the material and how much prep the attic needs, and I'll tell you at the estimate what to expect. With blown-in insulation you can usually stay home. Spray foam comes with a re-entry time, the wait before anyone goes back inside, so we'll tell you before we start when you, the kids and the pets can come back.
Is your insulation company licensed and insured?
Yes, Superior Sioux City Insulation Company is fully licensed and insured. Sioux City doesn't issue general contractor licenses, but the city does require contractors to be registered with the State of Iowa and to post a $10,000 bond with the city before getting building permits.
What do you check in the attic before adding insulation?
I look for anything that would undo new insulation, like damp or soiled old material, open gaps around can lights, pipes and the hatch, and buried eave vents. I also note how many inches are already up there and how old the house is, since both shape the plan.
Do you guarantee your insulation work?
Yes, our work is backed by our satisfaction guarantee. The rest of the protection comes from the order we work in, because dealing with leaks and damp spots first is what lets new insulation do its job.
Can you put new insulation over the old insulation in my attic?
Usually yes, if the old layer is dry and clean, but not if it was soaked or is full of droppings. That material comes out first, because fresh insulation laid over it leaves the problem right where it was. I'll tell you which one you have when I look.
Do I need a permit to insulate a house in Sioux City?
It depends on the job, so we check with the city or county office before work starts and take care of any permit it calls for. In Sioux City, Inspections and Permit Services issues building permits, and finishing a basement, which often includes insulating it, is one of the city's examples of permit work. Skipping a needed permit can mean opening walls or ceilings later for inspection. If you'd like to ask yourself, you can call the city at 712-224-5216.
Insulation work up close
How an insulation job goes with us
Call or send the form
Call (712) 560-3837 or fill out the contact form and tell us what's going on, whether it's a hot upstairs, cold floors or the room over the garage. We reply within one business day to set a time for me to come out and look.
I look and write it up
I come out myself and go through the attic, crawl space or walls, and I tell you what I see before I leave. Your free written estimate lays out the steps in order, problems first, then sealing, then insulation, with no obligation to go ahead.
Our installers do the work
Our installers follow that same order. Anything wet, soiled or unsafe gets dealt with first, then the gaps get sealed, and only then does the insulation go in. That way nothing new ends up covering an old problem, and we clean up as we go.
I check it before we finish
Before we call the job done, I check the work myself, looking at depth along the edges, the eave vents and the seals around lights, pipes and the hatch. Then I walk you through what we did and what changed up there.