Whether you’re building a new home or upgrading an existing home, Cullen Insulation delivers trusted residential insulation services that maximize home energy efficiency and comfort. With decades of experience, our residential insulation contractors offer comprehensive solutions for every area of your home, including attic insulation, basement insulation, wall insulation, and rim joist insulation.

The right combination of thermal insulation and air sealing services reduces monthly utility costs, improves indoor comfort, and protects your home for years to come. Our team specializes in professional insulation installation tailored to your climate, project, and budget.

Benefits of an Insulation Upgrade

Upgrading your insulation provides lasting value:

  • Lower energy bills and long-term residential energy savings
  • Reduced HVAC strain for longer system life
  • Quieter spaces with soundproof insulation between rooms
  • Better indoor air quality with moisture control insulation
  • Added protection from water with vapor barrier installation and waterproofing and insulation systems
Applicator spraying a horizontal pass of closed-cell foam onto a post-frame wall with white building wrap.

Our Residential Insulation Services

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

Spray foam Insulation

Cullen installs both open-cell spray foam and closed-cell spray foam, giving homeowners the ultimate in energy-efficient insulation and air sealing. Spray foam expands to fill gaps, creating a seamless building envelope insulation that improves comfort and reduces drafts. We provide spray foam insulation solutions for projects throughout much of North Dakota, South Dakota, Minnesota, Northwest Iowa, Nebraska, and Montana.

Fiberglass Insulation

As one of the most widely used products, fiberglass insulation is a reliable and cost-effective option for both new home insulation and existing home insulation. We install fiberglass batt insulation for walls and use blown-in fiberglass for attics, utilizing products from trusted manufacturers such as Owens Corning and Johns Manville.

Insulation batts installed in ceiling and walls of a wooden structure
Worker in protective gear spraying fireproofing material onto exposed wall framing inside a building under construction.

Blown In Cellulose Insulation

Eco-friendly and effective, blown-in cellulose insulation is a popular choice for attic insulation contractors and multi-family insulation projects. Cellulose is made from recycled materials and delivers excellent coverage, fire resistance, and sound control.

Rigid Foam Board Insulation

Perfect for foundation walls and exterior applications, rigid foam insulation adds durability and creates a barrier against moisture. It enhances moisture control insulation while increasing residential energy savings. We install both above-grade and below-grade rigid foam products to strengthen your building envelope insulation.

Interior basement walls lined with reflective rigid foam insulation panels, with exposed floor joists overhead
Dark membrane‑coated foundation corner with dimple board at the base and rolls of material nearby.

Waterproofing & Vapor Barriers

To further protect your investment, we offer complete waterproofing and insulation systems for basements and foundations. With vapor barrier installation and fluid-applied waterproofing solutions, your home stays dry and energy efficient from the ground up.

Service Areas Across the Region

About Cullen Insulation

Cullen Insulation proudly serves homeowners and builders across the Midwest. Whether you need residential insulation in Fargo, Bismarck, Grand Forks, Bozeman, or Sioux Falls, our expert team is here to help. Looking for insulation contractors near me? Trust Cullen’s local crews for dependable results.

Building Homes That Last

At Cullen, our mission is simple: deliver home comfort solutions and residential insulation services that stand the test of time. From residential construction insulation to insulation upgrade projects, our highly trained crews utilize quality products, meticulous attention to detail, and proven expertise to enhance homes throughout the region.

Contact us today for your free insulation cost estimate and discover why homeowners, builders, and contractors trust Cullen as one of the top residential insulation companies in North Dakota, South Dakota, and Montana.