about an hour from the shop, west on ND-1804 into Montana, then MT-200
Insulation services in Sidney, MT
Insulation work in Sidney, MT is about an hour from our Williston shop: west on ND-1804 past the Missouri-Yellowstone confluence near Buford, across the state line, and down the Yellowstone valley on MT-200. Williston Insulation handles spray foam, blown-in attic insulation, batts, rigid board, air sealing, and removal for houses, shops, and ag buildings in Sidney and the surrounding part of Richland County. Drew Niskanen quotes and installs the work.
The Yellowstone valley and its buildings
Sidney sits in the irrigated Yellowstone River valley, and for most of a century its economy ran on sugar beets. The Sidney Sugars factory closed in 2023, but the farms, the irrigation, and the ag buildings that went with them are still here: machine sheds, heated shops, and equipment barns up and down the valley. Sidney also has a share of oilfield service yards from the Bakken years, since the Williston Basin does not stop at the state line.
The housing is mostly older. Sidney has a solid core of houses from the 1950s through the 1970s, some earlier, and a modest layer of newer construction from the 2010s. Older houses here have the same issues as in Williston: settled attic insulation, 2x4 walls, and bare rim joists over basements. The newer houses need a check at the rim joist and attic hatch.
Valley cold versus prairie wind
Sidney is down in the river valley rather than up on the open prairie, which changes the weather a little. There is less constant wind than in Williston, but cold air settles in the valley on still winter nights, and the humidity off the irrigated ground and the river runs a bit higher. Both push the same direction for insulation: vapor control matters, and the rim joist and crawl space are where it matters most.
Closed-cell spray foam is a vapor retarder at around 2 inches, which is why we use it at rim joists and in crawl spaces here. Open-cell foam is not, so in those locations it needs a separate vapor retarder, and we usually skip it in favor of closed-cell.
Crossing the state line
Sidney is in Montana and on Mountain Time, so there is a one-hour time difference from Williston that we keep in mind when scheduling. The drive is about an hour each way, and we group Sidney and Fairview work together since Fairview is on the way. Larger jobs get a dedicated day or more. Smaller ones wait for a grouped trip. We tell you which when we quote.
Spray foam in Sidney
For Sidney, spray foam is mainly a rim joist, crawl space, and shop material. The older houses in town get two inches of closed-cell foam at the rim, which seals the band over the foundation and adds the vapor retarder the valley humidity calls for. Heated ag shops and oilfield buildings get foam against the steel. Attics get blown-in fiberglass after air sealing. See the spray foam insulation page for the full reasoning.
What we install in Sidney
Crawl Spaces & Rim Joists
Closed-cell foam on the rim joist and crawl space walls, with a ground vapor barrier, to fix the cold floors and drafts almost every older Williston house has.
Spray Foam
Closed-cell and open-cell spray foam for the assemblies where foam actually earns its cost: rim joists, crawl spaces, metal buildings, cathedral ceilings, and shops.
Blown-In Attic Insulation
Loose-fill fiberglass or cellulose blown to the Climate Zone 7 target of R-60, with the top plates sealed and the eaves baffled before the first bag goes in.
Pole Barns & Shops
Closed-cell foam sprayed direct to the steel skin of post-frame barns and shops, stopping the condensation drip and making the building cheap to heat.
Questions from Sidney
How does the trip charge work for Sidney?
We do not hide it. If the drive to Sidney changes a quote, it appears as its own line so you can see it. For a full house or shop it is a small share of the total. For a single small job it matters more, so we suggest grouping with other Sidney or Fairview work, and we are upfront about the wait that may involve.
Do you work in Montana even though you are based in North Dakota?
Yes. Sidney, Fairview, and Culbertson are all inside our service area, and the state line does not change how we work. The one practical difference is the time zone: Sidney is on Mountain Time, an hour behind Williston. We confirm appointment times in your local time so nobody is an hour off.
Can you insulate a crawl space under a Sidney house?
Yes. Crawl spaces in the valley benefit from closed-cell foam on the walls and rim joist, because it insulates and controls vapor in one pass. Access, height, and whether the crawl space is vented or sealed all affect the plan. We look at it before quoting and will tell you if a simpler fix is enough.
We work in Sidney from our shop at 1926 44th St W in Williston, about an hour away. There is no office in Sidney; we come to you. Nearby: Fairview, MT.
Get a quote in Sidney, MT
Send the basics and an owner comes back with a straight answer on what it needs, what it doesn't, and what it costs.