Spray foam service
Crawl Space Insulation in Fargo, ND
Insulate and protect crawl spaces against cold, moisture, and energy loss.
Sealing and insulating a Fargo crawl space with closed-cell foam stops the cold air and ground moisture that come up through it all winter — warmer floors above, lower bills, and far less risk of mold and rot.
Crawl spaces are a common weak point in Fargo-area homes — cold air and ground moisture come up through them all winter. Sealing and insulating the crawl space with closed-cell foam stops that cold transfer and helps control the moisture that leads to mold and rot.
The result is warmer floors above, lower heating bills, and a healthier home.
We seal crawl spaces throughout the area, from acreage homes around Casselton and Kindred to older houses in Moorhead.
- Warmer floors and lower heating bills
- Controls ground moisture and humidity
- Helps prevent mold, mildew, and wood rot
- Closed-cell foam built for our brutal winters
Good to know
Crawl Space Insulation — Common Questions
Should a North Dakota crawl space be vented or sealed?
In our cold winters and humid summers, sealed (encapsulated) crawl spaces almost always outperform vented ones. Venting lets in cold winter air and humid summer air that condenses, so we seal the walls with closed-cell foam.
Does crawl-space foam help with moisture and mold?
Yes. Closed-cell foam is a moisture barrier as well as insulation, so it stops the ground and outdoor humidity that feed mold, mildew, and wood rot in a damp crawl space.
Will insulating the crawl space warm up my floors?
Noticeably. Cold floors over an uninsulated crawl space are one of the most common complaints we hear in the Fargo area, and sealing the crawl space walls fixes the source.
Do you insulate the crawl space walls or the floor above?
For our climate we typically insulate the crawl space walls and rim, bringing the space inside the home's thermal envelope. It's more effective than insulating the subfloor and keeps pipes warmer.
From our blog
More on Crawl Space Insulation
Jun 29, 2026
Crawl Space Encapsulation in North Dakota: Is It Worth It?
Vented crawl spaces are a constant battle in North Dakota's climate. Here's what encapsulation actually does, what it costs, and whether it pays off for a Fargo-area home.
Read more Jun 18, 2026
Why Fargo Basements Lose So Much Heat at the Rim Joist (and How to Fix It)
The rim joist is one of the biggest hidden sources of heat loss and cold drafts in Fargo-area basements. Here's why it leaks and how spray foam seals it for good.
Read more