Bozeman, First Interstate Bank
Project by Montana Pro Contractors | Commercial Roofing Contractor
​
Montana Pro Contractors was proud to complete a full commercial EPDM roof renovation for the First Interstate Bank building in Bozeman, Montana. This project involved removing aging roofing materials, upgrading the insulation system, and installing a fully adhered EPDM membrane designed to deliver long-term waterproof protection, energy efficiency, and durability in Montana’s extreme climate. As a trusted commercial roofing contractor serving Bozeman and the Gallatin Valley, our goal was to provide a roofing solution that would protect this high-traffic financial institution for decades while improving building performance and reliability.
​
The First Interstate Bank building is located in one of Bozeman’s busiest commercial corridors, and it required a roofing system capable of handling heavy snow loads, freeze-thaw cycles, strong winds, and intense UV exposure. EPDM roofing was selected for its proven performance in cold climates, flexibility in extreme temperatures, resistance to ponding water, and exceptional lifespan. A fully adhered EPDM system provides superior wind resistance and long-term membrane stability, making it an ideal choice for commercial buildings in Southwest Montana.
​
Before installation began, our team conducted a comprehensive roof assessment to evaluate the condition of the existing system, identify moisture intrusion, inspect structural components, and design a replacement plan tailored to the building’s needs. This included checking the decking integrity, verifying slope and drainage performance, reviewing insulation values, and determining how best to improve energy efficiency while ensuring waterproof performance.
The first phase of the EPDM renovation involved detailed planning and site preparation. Commercial roof renovations require careful coordination to avoid disrupting daily operations, especially at an active bank facility. Montana Pro Contractors worked closely with building management to create a project schedule that minimized noise, controlled debris, and ensured safety for staff and customers throughout the process.
​
Our inspection revealed that the existing roofing system had reached the end of its service life. Years of exposure to Bozeman’s snow, sun, and temperature swings had weakened the membrane and reduced insulation performance. There were signs of seam deterioration, insulation compression, and moisture infiltration that made repair no longer cost-effective. A full roof replacement was the most responsible long-term solution.
Tear-Off and Surface Preparation
The renovation began with a complete removal of the old roofing materials. Our crew carefully removed the existing membrane and underlying components while protecting the building’s structure and surrounding areas. All debris was safely contained and removed from the site to maintain a clean, organized workspace.
​
Once the old roof was removed, we inspected the roof deck to ensure structural integrity. Any areas showing wear, moisture damage, or deterioration were addressed before new materials were installed. A stable, dry, and secure substrate is essential for proper EPDM performance, and we take this step seriously on every commercial project.
To improve energy efficiency and enhance the long-term performance of the new EPDM system, Montana Pro Contractors installed ISO board insulation across the roof surface. Polyisocyanurate insulation provides high thermal resistance, helping regulate indoor temperatures, reduce heating and cooling costs, and improve occupant comfort.
​
In Bozeman’s climate, insulation plays a critical role in preventing heat loss during winter and minimizing heat gain during summer. The upgraded ISO board layer not only improved the building’s energy efficiency but also created a smooth, stable surface for the EPDM membrane installation. Proper insulation also helps reduce the risk of condensation, ice dams, and thermal movement stress on the roof system.
With the deck prepared and insulation installed, our team began installing the fully adhered EPDM membrane. Fully adhered EPDM systems are bonded directly to the substrate using specialized adhesives, creating a continuous, secure attachment that offers excellent wind resistance and long-term stability.
​
EPDM was chosen for this project because of its flexibility, durability, and proven performance in cold climates. Unlike some roofing materials that become brittle in freezing temperatures, EPDM remains flexible, allowing it to expand and contract without cracking or failing. This flexibility is crucial in Montana, where temperature swings can be extreme.
​
Our crew carefully rolled out the EPDM membrane, bonded it to the surface, and sealed all seams and penetrations using manufacturer-approved techniques. Special attention was given to flashing details around roof edges, drains, HVAC units, and other penetrations to ensure a watertight seal and prevent future leaks.
​
Drainage and Flashing Enhancements
Drainage performance is a key factor in commercial roof longevity. Ponding water can accelerate membrane wear and increase the risk of leaks. As part of the renovation, Montana Pro Contractors evaluated and improved the roof’s drainage pathways to ensure water flows efficiently toward drains and scuppers.
We installed new flashing at all critical transitions, including parapet walls, roof edges, mechanical penetrations, and drainage points. Proper flashing installation is one of the most important aspects of a watertight roofing system, and our team uses precise techniques to prevent moisture intrusion in these vulnerable areas.
Benefits of the New EPDM Roof
The new EPDM roofing system delivers several key benefits for the First Interstate Bank:
• Long-term waterproof protection
• Superior resistance to snow, ice, and standing water
• High wind resistance through full adhesion
• Improved energy efficiency from upgraded insulation
• Reduced maintenance requirements
• Extended roof lifespan
• Enhanced protection for the building interior and assets
This investment provides peace of mind for building owners and ensures the structure is protected for decades to come.
​
Montana Pro Contractors: Commercial Roofing Expertise in Bozeman
Montana Pro Contractors specializes in commercial roofing systems designed for Montana’s demanding climate. Our team brings experience, precision, and professionalism to every project, whether it’s a bank, retail center, warehouse, office building, or multi-unit property.
​
We understand that commercial roofs protect more than just a structure — they protect businesses, employees, customers, and operations. That’s why we focus on long-term performance, proper system design, and meticulous installation.
​
Proudly Serving Bozeman and the Gallatin Valley
This EPDM renovation at First Interstate Bank in Bozeman reflects our commitment to delivering high-quality commercial roofing solutions throughout Southwest Montana. From Bozeman to Belgrade, Four Corners, Gallatin Gateway, and beyond, Montana Pro Contractors is proud to support the region’s growth with dependable exterior systems built to last.
​
If your commercial building needs roof replacement, flat roof installation, EPDM roofing, TPO roofing, or professional evaluation, Montana Pro Contractors is ready to help.
​
Contact us today to learn more about our commercial roofing services and schedule a consultation.
After installation was complete, Montana Pro Contractors performed a full system inspection to verify membrane adhesion, seam integrity, flashing installation, drainage performance, and overall workmanship. We ensure every EPDM installation meets or exceeds manufacturer specifications and local building codes.
​
The final inspection confirmed that the new EPDM roof provided full waterproof protection, improved energy performance, and enhanced durability for the First Interstate Bank building.