QUALITY COMES FIRST AT 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.

Over the years, we’ve become known as a leader in our market, and we’ve received national recognition for our exceptional insulation practices by the Owens Corning^® Certified Energy Expert^® program. However, our growth has not shifted our foundation. First and foremost, we maintain a commitment to excellence and a pledge to do simply the best job on time, every time.

Our Services Area

• Fargo
• Grand Folks
• Bismarck
• Sioux Falls
• Montana

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WHAT THE LOCALS ARE SAYING

"We’ve had Cullen Insulation doing our insulating for about 18 years. They are always proactive and on-schedule with good customer service. They have been a reliable sub-contractor for us throughout the years, always doing a good job." - Clay D. 

"Cullen Insulation is a very dependable company. We trust them. If they say they’re going to be there, they’ll be there on time and they’ll do the job right." - Terry B. 

"We value the partnership we’ve had with Cullen Insulation over the past six years. We have them do all of our insulation work, as they are a world-class outfit on a large enough scale to meet our demand." - Jon M.