Insulation Services in Belgrade, MT

Since opening in Belgrade in 2018, Cullen Insulation has been proud to serve a community that values hard work, craftsmanship, and neighborly service. Our company was founded in Fargo, North Dakota, in 1988 by Terry Cullen, and those roots still shape how we do business today. Led by our president Dan Frisch and VP Eric Brutger, we continue to bring that same level of excellence to Big Sky Country and our Belgrade friends and neighbors. We work with homeowners, builders, and property managers across the Belgrade area with a strong focus on relationships, communication, and doing the job right.

Belgrade is a unique place to live and build. Set at about 4,500 feet high in the Gallatin Valley, this area sees harsh winters, heavy snowfall, and wide temperature swings from day to night. That mountain climate can put real demands on homes and buildings. Insulation plays an important role, especially in attics and crawl spaces, in controlling heat loss, managing moisture, and helping prevent issues like ice damming.

Cullen Insulation technician installing vapor barrier plastic sheeting over fiberglass batt insulation inside a residential building under construction.

As Belgrade continues to grow, local homes and buildings need to perform well in every season. Whether you are near Montana State University, building for a growing neighborhood, or working on a property connected to the greater Yellowstone or Big Sky area, Cullen Insulation is here to help you create a more comfortable and efficient space.

As a trusted insulation contractor Belgrade property owners rely on, we understand that every project is different. Our team takes the time to understand your goals and recommend the right solution for your structure and your climate.

Montana

Belgrade

450 High K St. Belgrade, MT 59714

P: 406-813-8348 • F: 406-898-9853

Insulation Services We Provide to Our Belgrade Community

In this region, attics and crawl spaces deserve special attention. Heat loss through an under-insulated attic can lead to uneven indoor temperatures, higher heating bills, and ice damming when rooftop snow melts and refreezes. Crawl spaces can also create comfort and moisture issues when they are not properly insulated and sealed. By addressing these areas and reducing unwanted air movement throughout your home or building, we help customers create spaces that feel better year-round.

For many properties, that starts with tightening up the building envelope. Air sealing Belgrade homes and buildings is one of the most effective ways to reduce drafts and prevent conditioned air from escaping. When outside air gets in and indoor air leaks out, insulation cannot perform as well as it should. Sealing those gaps helps improve comfort and supports better energy performance.

Attic space with wooden rafters and loose-fill insulation material spread across the floor, providing thermal insulation for the home.

We also provide spray foam insulation Belgrade property owners often choose for areas where insulation and air control need to work together. In the right applications, spray foam can help reduce air movement while supporting strong thermal performance.

For projects that call for a dependable, cost-effective insulation system, we install fiberglass insulation Belgrade, MT homeowners, builders, and contractors continue to trust. Fiberglass remains a strong option for many residential and commercial applications and can be an effective choice for walls, ceilings, and other insulated areas.

As an insulation company Belgrade, MT residents know and recommend, Cullen Insulation works with homeowners, builders, multifamily contractors, and commercial clients throughout the region. No matter the size of your project, we stay focused on communication, dependable service, and work done with care.

Cullen Insulation truck with the Owens Corning Pink Panther Certified Energy Expert decal parked outside a new home under construction

Residential Insulation

Whether your home is old or new, we have the right insulation and air sealing solutions to maximize its energy efficiency.

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Multifamily Insulation

Our effective insulation products and services for apartments and condominiums help keep future residents happy and energy bills low.

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Worker finishing a long horizontal strip of spray foam on a post‑frame wall with white wrap backing.
Boom‑lift installer spraying dark fluid air‑barrier coating onto purple sheathing of a multi‑story commercial building, with a Cullen Insulation trailer parked below.

Commercial Services

We cover a variety of commercial building projects, both big and small, to meet the insulating needs of our Belgrade community and beyond.

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Rigid Foam Insulation

Help keep your residential or commercial building protected from air and moisture with rigid foam board. Ideal for exterior walls, we count on the products from Owens Corning and Johns Manville.

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Interior of a residential basement under construction with rigid foam board insulation installed on all walls by Cullen Insulation.
Cullen Insulation technician installing vapor barrier plastic sheeting over fiberglass batt insulation inside a residential building under construction.

Fiberglass Insulation

As the only Owens Corning® Certified Energy Expert® in our region, we are proud to provide the latest fiberglass insulation innovations for your Belgrade home or building. Builders and homeowners count on the effectiveness and affordability of this classic insulation.

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Air Sealing

Before adding insulation, close the gaps and cracks throughout your home or building that are leaking valuable air. It reduces energy waste and improves your structure’s indoor air quality for a more comfortable space to live or work.

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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.
Crew on boom-lift sealing a vertical corner with blue air-barrier membrane.

Air Barrier

This solid air barrier is installed on your building’s outer walls to protect it from damaging winds and rain long after construction is completed.

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Spray Foam Insulation

Insulate and air seal your home or building in one easy installation with the dual power of expanding spray foam. We install the fine products from BASF Spray Polyurethane Foam and Johns Manville.

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Residential attic undergoing spray foam insulation installation, walls covered, windows visible
Residential foundation wall coated in black tar for waterproofing and moisture control.

Waterproofing

Our waterproofing solutions keep your home or building safe from the outside elements that want to do it harm. Our fluid-applied and self-adhered waterproofing materials are most effective when applied to commercial exterior foundation walls and residential foundations.

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Belgrade Team Members

Daniel Davis

Branch Manager

Daniel has worked in our industry for over three years, bringing with him his military background as a U.S. Army veteran with six years of service and his experience as an EMT and Search & Rescue Specialist. Originally from Williamsburg, VA, Daniel values success and takes pride in watching his team come together as a cohesive unit. He loves working with Montanans, appreciating their honesty, kindness, and understanding. What stands out most to him about his team is their willingness to help each other out and work together to achieve the same goals.

Outside of work, Daniel enjoys snowboarding, mountain biking, and riding motorcycles. His advice for anyone considering a career in the trades: “It takes a special breed of person to do what we do, but if you’re patient, open-minded, and willing to learn, we have a place for you in this family, on this team.”

Daniel Davis, Branch Manager at Cullen Insulation's Belgrade, MT branch

Serving Belgrade and the Surrounding Area

This part of Montana includes a wide range of homes, buildings, and project types. Many in the community are building in growing neighborhoods close to town. Others are working on mountain-area homes, commercial spaces tied to tourism, or properties that need to perform through long winters and changing conditions. No matter the location, our team brings local understanding and insulation solutions built for this climate.

Our Belgrade branch is proud to serve not only Belgrade, but also nearby communities throughout the region.

They include:

  • Livingston
  • Manhattan
  • Three Forks
  • Big Sky
  • West Yellowstone
  • Surrounding Gallatin County communities.

Installing Excellence for our Belgrade Community

We love being part of the Belgrade community and the things that make it special. From the pride of the MSU Bobcats community to the steady flow of residents and visitors drawn by Yellowstone, Big Sky, and life in the Gallatin Valley, Belgrade continues to grow while holding onto its strong sense of place. That local character matters, and we are proud to serve it.

Cullen Insulation may have started in Fargo in 1988, but our approach has always been centered on relationships, respect, and doing right by the people we serve. Since coming to Belgrade in 2018, we have been grateful for the opportunity to work with local homeowners, builders, and property managers who care deeply about their properties and community.

In a climate like this one, insulation is an important part of comfort, efficiency, and long-term building performance. Harsh winters, snowfall, and mountain weather can expose weak points in a structure quickly. The right insulation and air sealing plan helps protect against those issues while supporting better comfort in every season.

If you are looking for a dependable partner for your next project, Cullen Insulation is here to help. From homes and multifamily properties to commercial construction, our Belgrade team is ready to serve.