Cullen Insulation

Cullen Insulation is a local insulation installer, building science expert, and energy performance consultant. We built our business on the simple, honest qualities that add up to total customer satisfaction. Cullen Insulation started in 1988 with $700 to buy a used pick-up truck. Through skillfulness, attention to detail, and pride in workmanship, we have expanded to five locations, more than 60 team members, and over 40 vehicles. Our offerings now include fiberglass insulation, spray foam, rigid foam insulation, waterproofing and air barrier installation—and we service both commercial and residential projects. With locations in Fargo-Moorhead, Grand Forks, Bismarck, Sioux Falls, and Bozeman, we can be where you need when you need us.