Cullen Insulation Locations to Serve You

Our founder, Terry Cullen started our company in 1988 with $700 to buy a pick-up truck. He set out to change the town of Fargo, ND for the better with excellent workmanship, impeccable customer service, and integrity. Since then, Terry, and now his successors, Dan and Eric, have continued that tradition of excellence.

Their vision of bringing energy efficiency solutions to a greater audience has continued to bloom. Over the years, Cullen Insulation is proud to have branched out to five locations, now serving homeowners, builders, and contractors throughout six states, including North Dakota, South Dakota, Montana, Northwest Iowa, Nebraska, and Minnesota.

When you need to protect your home or building from the elements and maximize its energy efficiency, turn to the Cullen team to get the job done right.

American family playing catch outside of house.

Our Services Locations

Look for the Cullen Insulation location that is closest to you and your project. The expert team at each of our locations is ready to serve you today.

Fargo/Moorhead, ND

Opened in 1988, our anchor store serves our Fargo/Moorhead communities and their surrounding areas through quality insulation services and community involvement. Our Fargo team continues to be a generous sponsor and supporter of the Cullen Children’s Foundation, youth sports, local charity golf tournaments, high school sports TV, and local opportunities to insulate homes for families in need.

Grand Forks, ND

Our second store opened in 2007 and serves the local Grand Forks community and beyond. Our Grand Forks team has had the privilege of installing insulation, air barrier, and waterproofing solutions in a variety of places throughout Grand Forks, including the Altru Health System Hospital, Discovery Elementary School, and Red Lake Replacement Housing.

Bismarck, ND

In 2011, we branched out to store number three, located in Bismarck, ND to serve our growing community of customers throughout central and western North Dakota. Our Bismarck team prides itself on being an active part of the area, building lasting relationships with homeowners, business owners, and builders.

Sioux Falls, SD

2018 saw the birth of store number four in Sioux Falls, SD. This location is ideally situated to serve our local communities throughout South Dakota, Northwest Iowa, and Southern Minnesota. Our dedicated Sioux Falls team takes an active role in bringing energy efficiency products and services to this expanding area.

Bozeman, MT

We added a new state to the mix in 2018 with our most recent branch location in Bozeman, MT. This location provides the Bozeman community with ways to save on energy costs and protect their structures from damaging winds and rains.

The Cullen Way

At Cullen Insulation, for the last thirty-five plus years we’ve built our business on a foundation of quality craftsmanship, service, and a team-first culture. We work together as a team to deliver only the best products and services to each of our customers. With rigorous training in building science and fiberglass insulation products, we became our region’s only Owens Corning® Certified Energy Expert®. This certification allows us to bring our community of customers even more innovative fiberglass solutions and exclusive warranties to better their homes and buildings. When you need an insulation company you can trust, call on us. We’re here to keep our communities throughout our service areas thriving with the most up-to-date energy solutions on the market.