Vapor barrier installation in Mandan ND - a crawl space covered edge to edge

Usually the call starts with a cold floor over the crawl space, a musty smell in the house, or a look through the access hatch at bare dirt and a sheet of old plastic bunched in one corner. The price mostly turns on how big the crawl space is, how much is stored down there, how many walls and piers the cover has to wrap, and whether the space is vented to the outside or sealed up, since a sealed one takes more sealing work. The schedule turns on how easy it is to get in and how much has to come out first, and you'll get your own number from the estimate.

Boxes, old paint cans and whatever the last owner decided to leave behind all come out first, because a cover can't reach ground that's buried under storage. Then we cover all of the ground, the low corners and the strip behind the piers too, not just the easy middle where you can kneel. Federal installer guidance runs the cover up the walls, columns and footings, fastens it where needed and overlaps every seam, and it says the cover should leave the crawl space's drainage working the way it did, so that's a fair standard to ask every contractor about when you compare quotes.

A ground cover deals with moisture coming up from the dirt, but cold floors and a high power bill usually have help from above, so we often pair it with attic air sealing, closing the gaps that let warm air out the top of the house. In an older house that's thin on insulation, retrofit insulation adds more to the walls and attic you already have without tearing the rooms apart.

In Mandan, permits come from the city's Building Inspection Department, which requires them for residential construction over $2,000 and for any structural alteration. Its list names work like furnace changeouts but says nothing about vapor barriers, so the list alone doesn't tell you whether your job needs one. When a job does need a permit, we pull it and set up the inspections, where the city checks the work against building code.

Most crawl spaces we see around Mandan sit under older houses, with low clearance, an addition on a different foundation and old plastic covering about half the dirt. We run into the same thing on jobs in Bismarck, so we plan for tight corners and extra piers before the crew shows up.