Cornerstone Management Services - CMSBigSky

Cornerstone Management Services - CMSBigSky Protecting and progressing our community by redefining exterior building performance.

Cornerstone Management Services, also referred to as CMS, is an exterior envelope contractor proudly serving and located within the Big Sky, MT, community for 20 years. Our focus is building long term, sustainable exterior systems specifically designed and tested for high alpine environments. Our scope focuses include but are not limited to roofing, cold roof design/framing, metal siding installation, and below/above grade waterproofing.

05/29/2026

This week was out of this world. Great job team!

Most roof problems in Big Sky do not start with the finished roof material. They start with the system underneath.Our Co...
05/27/2026

Most roof problems in Big Sky do not start with the finished roof material. They start with the system underneath.

Our Cold Roof systems help manage ventilation, heat movement, energy effiency, moisture, snow behavior, and long-term performance, which matters in a place where mountain conditions can punish standard details.

After 20 years working in Big Sky, we’ve learned that roofs need more than surface-level solutions. We broke down why in our latest blog.

Read the full post at the link in bio.

Most roof problems in Big Sky do not start with the finished roof material. They start with the system underneath.Our Co...
05/27/2026

Most roof problems in Big Sky do not start with the finished roof material. They start with the system underneath.

Our Cold Roof assemblies help manage ventilation, heat movement, energy effiency, moisture, snow behavior, and long-term performance, which matters in a place where mountain conditions can punish standard details.

After 20 years working in Big Sky, we’ve learned that roofs need more than surface-level solutions. We broke down why in our latest blog.

Read the full post at the link in bio.

Most roof problems in Big Sky do not start with the visible roof material. They start with the system underneath.Our Col...
05/27/2026

Most roof problems in Big Sky do not start with the visible roof material. They start with the system underneath.

Our Cold Roof systems help manage ventilation, heat movement, energy effiency, moisture, snow behavior, and long-term performance, which matters in a place where mountain conditions can punish standard details.

After 20 years working in Big Sky, we’ve learned that roofs need more than surface-level solutions. We broke down why in our latest blog.

Read the full post at the link in bio.

Teamwork. Collaboration. Education.A job site is where all three come together.Big shoutout to the CMS team for the coor...
05/21/2026

Teamwork. Collaboration. Education.

A job site is where all three come together.

Big shoutout to the CMS team for the coordination and effort going into this cedar shake multi-unit remodel. Projects like this move the right way when people share knowledge, communicate well, and stay committed to the details.

Excited to show more as this one comes together.

Good people, good conversations, (a few) good shots, and a good reminder that strong partnerships matter.A big thank you...
05/18/2026

Good people, good conversations, (a few) good shots, and a good reminder that strong partnerships matter.

A big thank you to Rocky Mountain Reps, Versico, and Drexel Metals for putting together the RMR 2026 Clay Shoot. We always appreciate opportunities like this to connect with partners, talk shop, and spend time with others who care deeply about quality in this industry.

Thanks to everyone involved for a great afternoon.

20 years in. 20/20 on what works. We’re proud of our story and the place that shaped it. Big Sky has challenged us from ...
05/07/2026

20 years in. 20/20 on what works.

We’re proud of our story and the place that shaped it. Big Sky has challenged us from day one and that’s exactly what’s made us better.

Check out the full story in the Bozeman & Big Sky | Summer & Fall 2026 Issue of Western Home Journal.

As the seasons shift, it’s time to take a closer look at what winter left behind.Our Service & Maintenance team is geari...
05/01/2026

As the seasons shift, it’s time to take a closer look at what winter left behind.

Our Service & Maintenance team is gearing up for spring and summer. We are focused on inspections, preventative care, and helping buildings perform the way they’re supposed to.

Small issues now don’t have to become big problems later. DM us to get on our schedule.

04/23/2026

Reach out if you need a partner on your next project, no matter the size.

Happy Earth Day.Construction has a significant impact on the environment—but it also has the potential to improve it.At ...
04/23/2026

Happy Earth Day.

Construction has a significant impact on the environment—but it also has the potential to improve it.

At CMS, we’re focused on building smarter, reducing waste where we can, and choosing systems and partners that support long-term performance.

It’s not about being perfect—it’s about continuing to improve.

Address

176 Running Iron Road
Gallatin Gateway, MT
59730

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+14069932533

Website

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