Basement insulation in Mandan ND - a warmer basement with dry foundation walls

Most calls start with cold floors, a basement nobody wants to sit in, or a power bill that climbs once the furnace kicks on, and some come from people about to finish the space who want the walls right before the drywall goes up. The price moves with how much wall you have, what's on it now, whether old insulation has to come out and which material goes on the foundation, while the schedule mostly turns on whether there's water to deal with first and when an inspection can happen if the job needs one. If part of the house sits over a crawl space instead, that's crawl space insulation, and I can look at both on the same visit. Your own figure comes from the estimate, once I've seen the basement.

First I walk the basement and look at the walls, the corners and the floor line for stains and the white crust water leaves behind on concrete. If water is getting in, that gets fixed before we talk insulation, because damp walls ruin good material, and I'd rather tell you now than bury the problem behind a new wall. Once the walls are dry, we pick what goes on the foundation by how well it handles moisture, clean and prep the surface so the insulation holds tight to it, and seal the gaps around pipes, wires and the top of the wall so the new layer isn't fighting a draft. Then our crew puts it on and cleans up, so the basement is at least as tidy as we found it.

For the foundation itself, closed-cell foam insulation is the dense kind that blocks moisture and seals air in the same pass, so it's what I reach for on bare concrete or block, even though it costs more. Open-cell foam insulation is lighter and cheaper, but it lets moisture through, so we keep it for framed walls and ceilings away from the foundation.

Mandan requires a permit to build, alter or repair a building inside city limits and out to 2 miles past them, and the city's Building Department handles residential permits. Whether insulating your basement walls needs one isn't something I'd guess at, so ask the department at 701-667-3230, or ask me and I'll find out. When a job needs a permit, we pull it and set up the inspections. This matters most with foam, because building code requires gypsum board over foam on basement walls as a thermal barrier, a covering that keeps fire off the foam, so plan for that board in your budget and your schedule.

We're based in Mandan and do a lot of work in Bismarck and the cities around them, and the basements we see in Mandan and Bismarck run from older block walls with a patched crack or two to poured walls in newer houses. Older block gets a closer look at the mortar joints before we plan anything, and newer poured walls usually take foam or board without much fuss.