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Photo: Nate Kesteleyn

Nate Kesteleyn

Nate has spent decades in high-performance construction — from hands-on building to coaching professionals across North America on envelope performance, energy efficiency, and durable construction methods.

He founded Carbonless to bring together the services and products that construction professionals actually need: expert guidance, quality execution, and a building panel system that performs at a level conventional construction can't match.

Based in Montana, Nate works with architects, builders, developers, and building owners on projects ranging from custom residences to light commercial developments across North America.

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What We Believe

Our Values

These aren't wall decorations. They're the principles behind every project decision we make.

01

Performance Is Non-Negotiable

We don't build to minimum code. We build to standards that will still look excellent 50 years from now — because that's what our clients and the buildings deserve.

02

Honesty Over Sales

If your project isn't a good fit, we'll tell you. If there's a better approach than what you've proposed, we'll say so. Our job is to help you succeed, not to close a deal.

03

Practical Expertise

Deep technical knowledge is only useful if it translates into real-world results. We combine high-performance thinking with builder's pragmatism.

04

Long-Term Relationships

We measure success not by project close but by how the building performs five and ten years later — and by whether clients bring us back on the next one.

By the Numbers

What We've Built

A track record built over decades of focused, high-performance work.

20+Years in High-Perf Construction
MTMontana-Based, Nationwide Reach
R-40+Minimum Envelope Standard
100%Owner-Operated & Accountable
Let's Connect

Ready to Work Together?

Whether you're planning a project, need guidance, or want to order panels — the first step is a conversation.

Get in Touch → See Our Projects