Insulation Contractor in Mandan, ND - Warmer Rooms Before Winter Hits
R&T Mandan Spray Foam Insulation is an insulation contractor based in Mandan, ND. We air seal and insulate attics, walls, basements and crawl spaces in Mandan homes and businesses, fixing what's wrong first so nothing gets buried.
Mandan houses and what's waiting in their attics
Mandan is home, and it's where we started. We've been in a little of everything here: older houses near downtown with plaster walls and attics that three different owners added onto, ranch houses with a few inches of something gray over the ceiling, and newer houses on the edges of the city that went up fast and skipped the air sealing.
We do a lot of work in Bismarck too, but the older Mandan houses are where I learned the trade. In those, the job usually starts with finding out what's already up there, because nothing is square and something odd is waiting in most of them.
Permits, licenses and price on a Mandan job
Building permits for a Mandan house come from the city's Building Inspection department at City Hall, which covers houses inside city limits and in the 2-mile zone just past them. When an insulation job needs a permit, we pull it and set up the inspections, and I build the inspection into the schedule so you know about it up front. If you're not sure about yours, call Building Inspection at 701-667-3230, or ask me and I'll find out. North Dakota also requires the person doing the work to hold a state contractor license through the Secretary of State on any job over $4,000, so ask whoever you hire for theirs. We're fully licensed and insured.
What moves the price here is mostly what's already in your attic and how much air sealing it needs first, closing the gaps around can lights, pipes and the hatch so warm air stops leaking up. Foam costs more and seals air while it insulates, so spray foam insulation is what I'd pick when the ductwork runs through the attic. Otherwise sealing the gaps and topping up with blown-in insulation, loose fill blown through a hose, usually wins. The schedule mostly turns on the permit and on whether anything has to come out before we start, and we handle jobs in Bismarck the same way.
What Mandan winters and older houses do to your insulation
Mandan's winters show up on the roof first. The city requires ice barrier underlayment, a protective layer under the roofing, which tells you how much ice builds at the edge of roofs here. A lot of that ice starts in the attic, because heat leaking up from the house melts the snow from underneath and it refreezes at the cold edge. We seal first, keep the eave vents open and get the insulation as deep at the edges as in the middle, so the attic stays cold and dry, which is how it's supposed to be.
Cold floors and a hot room upstairs usually start somewhere else. In older houses here it's often a crawl space nobody insulated, or the room over the garage where the insulation sagged years ago, and we go after that spot instead of selling you a whole house.
Get a free on-site insulation estimate for your Mandan house
Send us a few details and we'll get back to you within one business day to set a time. I come out to your Mandan house myself, look at what's there and what needs fixing first, and give you a free estimate with no pressure to book.
(701) 299-5063How it works when you call us in Mandan
Call or send a note
Call (701) 299-5063 or fill out the form and tell us what you're noticing, like a drafty bedroom, a hot upstairs or a power bill that keeps climbing. If you know roughly when the house was built, mention it.
I come out and look
I come out myself and check the attic, walls, basement or crawl space, including how many inches are up there now and what has to be fixed first. If you can find the attic hatch, clear a path to it, because in some older houses that's the hardest part of the visit.
Go over the estimate together
I write up the estimate and walk you through what comes first and why. If I find a problem, like a bath fan blowing straight into the attic, I'll tell you instead of working around it.
We take care of permits
When the job needs a permit, we pull it from the city and set up the inspections. The inspection is one of the things the start date gets built around.
Crew works, I check it
Our crew does the work with me on the job, sealing first and insulating second. I look it over before we pack up and leave your house as clean as we found it, or a little cleaner.
Attics, walls and crawl spaces
Insulation questions from Mandan homeowners
Do I need a permit to insulate my attic in Mandan, ND?
You might, so we settle it with the city before the crew starts. The city requires a permit for residential construction over $2,000 and lists attic insulation among the inspections it does. The examples it gives of work needing no permit are things like painting, tiling, carpeting and landscaping.
How do I check if my Mandan house is in the flood inundation area?
Look up your property on the interactive map on the city's flood risk reduction project page, which shows whether it falls inside the inundation area or outside it. It's worth knowing before we insulate a basement or crawl space, because a space that could take on water usually calls for closed-cell foam, a dense foam that blocks moisture, rather than something that soaks it up.
Which building code applies to insulation work in Mandan?
Mandan follows the State Building Code in the most current edition the state has amended and adopted. The city's design page still lists the 2021 codes, and the state's newer update took effect for eligible cities on Jan. 1, 2026, so Building Inspection is the place to confirm which edition your job falls under.
How much does it cost to insulate an attic in Mandan?
I can't give you a fair number until I've been in your attic, because the price turns on what's already up there. The biggest swings are whether the old insulation has to come out, how much sealing the attic needs, how tight the access is and whether the job calls for foam or loose fill. Once I've looked, you'll have a number for your house.
Do we have to leave the house while you insulate?
For air sealing and blown-in work you usually don't, but with spray foam you, the kids and the pets stay out until the re-entry time has passed, which is when it's safe to come back in. I'll tell you that time for your job before we start, so you can plan where to be.
How do I tell if old attic insulation needs to come out?
If it's been soaked, smells musty or is full of mouse droppings, it usually comes out before anything new goes in, because fresh insulation on top just buries the problem. Dry insulation that's only thin can usually stay and get topped up, and that's one of the first things I check when I come out.
Where we work
Get your Mandan attic looked at
We answer weekdays until 11 PM and weekends until 10 PM, so you can call (701) 299-5063 after work or send the form tonight.