At Cullen Insulation, excellence is our standard and it shines through in everything we do, from our craftsmanship to our customer relationships and into every avenue of communication. Our customers, whether homebuilders, contractors, or homeowners, count on us for a job well done. We value the time and budget of every project, and the quality of our work speaks for itself.

Every project is different, and every building has unique energy efficiency needs. Our dedicated team of installers is highly trained in the latest building science so you can rely on our detailed, tailored insulation solutions for your project.

Residential attic undergoing spray foam insulation installation, walls covered, windows visible

Insulation Services

Residential interior showing newly installed spray foam insulation between wall studs and exposed mechanical ductwork overhead.

Residential Insulation

We offer residential insulation services for both new homes and retrofit projects. Whether you are building a home or upgrading your current home, we have the right insulation and air sealing products to maintain a comfy home throughout every season.

Close-up view of fiberglass batt insulation installed underneath an overhang on a residential construction project.

Multifamily Insulation

Our multifamily insulation services include energy efficiency solutions for apartment and condo buildings throughout our service areas. We install insulation solutions that make every unit feel like its own home.

Construction workers on cherry pickers installing 3M DensGlass sheathing on building exterior.

Commercial Services

Our commercial services cover full range of construction projects including office buildings, hospitals, military projects, water treatment plants, and university buildings such as libraries, law buildings, and union halls. Whether your project is big or small we have the insulation solution to maximize your commercial building’s energy efficiency.

Close-up of a foundation wall with taped seams creating an air barrier over rigid sheathing during construction.

Air Barrier

We install an air barrier made of a lightweight, breathable, synthetic material, that is adhered to the outer walls, behind the siding, of your commercial building during construction. Once installed, this solid air barrier protects your building from damaging winds and rain long after construction is completed. It’s also breathable so trapped water vapor can escape.

Clear plastic vapor‑barrier sheeting stapled to interior wall framing, with a small bead of spray foam sealing an electrical wire penetration through the stud.

Air Sealing

Eliminate construction penetrations leaking valuable air throughout your new or existing building with air sealing. Count on our dedicated team to evaluate your home or business and provide the best air sealing product for your project.

Insulation batts installed in ceiling and walls of a wooden structure

Fiberglass Insulation

This classic insulation is budget friendly and highly effective. We provide both fiberglass batts and loose-fill fiberglass to ensure the right fit for your insulating project. Our installers count on the high-quality fiberglass products from our trusted suppliers, Owens Corning and Johns Manville.

Interior basement walls lined with reflective rigid foam insulation panels, with exposed floor joists overhead

Rigid Foam Board Insulation

Rigid foam board insulation acts as a weather-resistant barrier to enhance your building’s resistance to air and moisture. Ideal for exterior walls, we install both above-grade and low-grade rigid foam board for residential and commercial buildings from Owens Corning and Johns Manville.

Tall walls and ceiling of a large room fully insulated with white spray foam between the wooden framing studs.

Spray Foam Insulation

Spray foam insulation is the only insulation choice that insulates and air seals in one easy step. Enjoy increased energy efficiency and better indoor air quality throughout your building envelope with this expanding foam. We install the fine products from BASF Spray Polyurethane Foam and Johns Manville.

Residential foundation wall coated in black tar for waterproofing and moisture control.

Waterproofing

Protect your new commercial or residential building from the elements with our waterproofing solutions, including a wide range of fluid-applied and self-adhered waterproofing materials. Waterproofing is most effective when applied to commercial exterior foundation walls and residential foundations.

Services You Can Count On

From our humble beginnings in 1988, to our five locations in North Dakota, South Dakota, and Montana, Cullen Insulation has always been focused on delivering quality insulation with integrity throughout the region, including Nebraska and Wyoming. Contact us today to learn more about our tailored services for your commercial or residential building.

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Cullen Information truck with Pink Panther "Certified Energy Expert" logo parked outside a modern house under construction.