Business Details
38 Years
experience
Trusted Insulation Services for Energy Efficiency
Cullen Insulation was founded in 1988 by Terry Cullen with a commitment to delivering quality insulation services to the local community. Over three decades, we have expanded to six locations across North Dakota, South Dakota, Montana, and surrounding regions, serving residential, commercial, and multifamily clients. Our team prioritizes energy efficiency, using advanced building science and products from trusted suppliers like Owens Corning and Johns Manville. As the region's only Owens Corning Certified Energy Expert, we combine technical expertise with personalized service to meet unique project needs. We emphasize open communication, quality workmanship, and community involvement, supporting initiatives like the Cullen Children's Foundation.Our services include air sealing, waterproofing, and insulation solutions tailored to harsh Midwestern climates. With 90 team members and a focus on continuous improvement, we maintain rigorous training standards to ensure cutting-edge solutions. Our leadership team, including President Dan Frisch and Vice President Eric Brutger, brings decades of industry experience and a dedication to ethical business practices. We serve diverse sectors, from hospitals and schools to residential homes, with a focus on long-term customer relationships. Our mission remains unchanged: to provide reliable insulation solutions while fostering a team-first culture and contributing to energy-efficient communities.
Services
Residential Insulation
Multifamily Insulation
Commercial Services
Air Barrier
Air Sealing
Fiberglass Insulation
Rigid Foam Board
Spray Foam Insulation
Waterproofing
Tax Credits
Details
- Year established: 1988
Highlights and features
- We have 35+ years of experience in insulation and energy efficiency solutions
- Our team includes Owens Corning Certified Energy Experts with specialized training
- We offer tailored insulation solutions for residential, commercial, and multifamily projects
- We maintain a team-first culture with 90 dedicated professionals across six locations
- We combine technical expertise with community-focused values and open communication
Associations and certifications
- Owens Corning Certified Energy Expert
Services
Residential Insulation
We provide comprehensive residential insulation solutions for new construction and retrofit projects. Our services include attic, basement, wall, and rim joist insulation using fiberglass, spray foam, and rigid foam board materials. These solutions reduce energy bills by up to 30%, improve indoor comfort, and enhance soundproofing while maintaining structural integrity in Midwestern climates.
Commercial Services
Our commercial insulation services cover office buildings, hospitals, universities, and industrial facilities. We install air barriers, spray foam, and rigid insulation systems that meet strict energy codes while improving occupant comfort. Our team works with contractors to ensure compliance with project specifications and timelines for both new construction and renovation projects.
Air Sealing
We identify and seal air leaks in residential and commercial buildings using caulk and spray foam technologies. This process eliminates drafts, reduces energy waste by up to 20%, and improves indoor air quality by preventing allergen infiltration. Our technicians follow building science best practices to create effective thermal and air barriers during construction or retrofit projects.
Spray Foam Insulation
We install open-cell and closed-cell spray foam insulation that simultaneously insulates and air seals building envelopes. This expanding foam creates a permanent barrier against energy loss, moisture intrusion, and sound transmission. Our BASF and Johns Manville products meet commercial building code requirements while providing R-values up to R-6.5 per inch for superior thermal performance.
Waterproofing
Our waterproofing solutions protect residential and commercial foundations using fluid-applied and self-adhered membranes. These systems prevent water damage to concrete walls, elevator pits, and below-grade structures while allowing vapor escape. We follow manufacturer specifications to ensure long-term protection against mold growth and structural deterioration in high-moisture environments.
People
Dan Frisch
President
Dan Frisch has led Cullen Insulation since 2017, bringing 25 years of industry experience. He emphasizes clear communication and customer relationships, having previously worked in construction management. Dan actively participates in community initiatives and youth hockey coaching.
Eric Brutger
Vice President
Eric Brutger co-owns Cullen Insulation with 30 years in the insulation industry. He holds advanced degrees in business and construction management, focusing on technical innovation and team development. Eric prioritizes continuous improvement and sustainable building practices across all company operations.
Questions
What areas does Cullen Insulation serve?
We serve North Dakota, South Dakota, Montana, Northwest Iowa, Nebraska, Minnesota, and Wyoming from our six regional locations.
What insulation types do you offer?
We provide fiberglass, spray foam, rigid foam board, and cellulose insulation solutions for residential, commercial, and multifamily applications.
Are you certified insulation experts?
Yes, we are the region's only Owens Corning Certified Energy Expert with specialized training in advanced insulation technologies.
Do you handle both residential and commercial projects?
Yes, we serve homeowners, builders, and commercial contractors with tailored insulation, air sealing, and waterproofing solutions.
How can insulation reduce energy costs?
Proper insulation with air sealing can reduce heating and cooling costs by 20-30% through improved thermal efficiency and reduced air leakage.
What makes Cullen different from other insulation companies?
We combine 35+ years of local experience with technical certifications, community commitment, and comprehensive solutions for all building types.