icf builders in montana

Welcome to Your New Foundation in flathead valley

Tailored For You

Whether you're building your dream home or a commercial project, our offerings are designed with your specific needs in mind.

Made in USA & Canada

As the Flathead Valley's leading supplier, we bring you Superform ICF blocks—manufactured in the US and Canada and acclaimed for unmatched quality.

Sustainability & Innovation

With ICF, prepare for reduced energy bills, superior insulation, and a quieter, more comfortable indoor environment.

Building the Future with Strength and Precision

At Holdfast ICF, we understand the unique needs and environmental challenges of building in the rocky and steep Kalispell, Bigfork, and Whitefish areas.

Our mission is centered around you – helping you create durable, energy-efficient, and comfortable structures using the premier building solution, Insulated Concrete Forms (ICF).

superform™️ authorized dealer

Crafting Excellence in Every Block

Superform ICF is at the forefront of the industry, creating building materials that not only meet but exceed the expectations of modern construction in the Flathead Valley and beyond. Our alliance with Superform brings you top-grade ICF solutions, crafted with precision and care to empower your projects.

Explore Our Insulation Solutions

Discover the Best Insulation for Your Project

SuperForm™️ EPS+

SuperForm EPS+ is an extraordinary expanded polystyrene insulation known for its lightweight nature and superior insulating properties. Ideal for a broad spectrum of applications, it offers unparalleled versatility, making it the perfect solution for everything from residential homes to large commercial buildings seeking to enhance energy efficiency and acoustic performance.

SuperForm™️ MAX+

For projects demanding the utmost in strength and moisture resistance, SuperForm MAX+ stands out as the premium choice. This extruded polystyrene insulation offers robust features tailored for challenging environments, where durability, long-term stability, and superior insulation against extreme temperatures are critical.

Residential Projects

Elevate Your Home with Holdfast ICF

Building your dream home in Northwest Montana? Discover the unmatched benefits of Insulated Concrete Forms (ICF) for a living experience that’s as beautiful as your surroundings.

Commercial Projects

Build Your Business's Future with Holdfast ICF

Elevate your business with buildings that stand as a testament to durability, energy efficiency, and innovation. With Holdfast ICF, your commercial structure mirrors your ambition—robust, efficient, and ahead of the curve.


Hear From Our Happy Clients

At Holdfast, we’re proud of the solid relationships we’ve built and the successful projects we’ve delivered. Here’s what some of our customers have to say about working with us.

Working with Holdfast on our commercial development was a game-changer. Not only did they provide top-notch materials, but their team's expertise and dedication to meeting our tight deadlines were unparalleled. It's rare to find a partner so committed to excellence and client satisfaction. We're looking forward to our next project together.
Alexandra N.
Project Manager
From the initial consultation to the final inspection, Holdfast exceeded every expectation. Their attention to detail, quality of work, and exceptional customer service set them apart in the industry. Our project benefitted immensely from their innovative solutions and commitment to sustainability. We couldn't be happier with the outcome.
Ethan T.
I was initially apprehensive about undertaking a major renovation of my family home, but Holdfast made the process seamless and stress-free. Their professionalism, timely communication, and ability to deliver were incredibly reassuring. The project was completed on time, within budget, and exceeded my expectations.
Sophia R.

Ready to take your construction projects to the next level?

Let us equip you with the tools for building futures as enduring as our ICF solutions. Reach out today for more information or to request a quote.