First Interstate Bank, Great Falls
See all that goes into the proper installation of a large scale ashpalt shingle roof in a high wind area
Before
Planning a 23,000-Square-Foot Commercial Roof Replacement
Every successful commercial reroof begins with a comprehensive evaluation. Before work started at First Interstate Bank in Great Falls, Montana, Montana Pro Contractors performed a detailed inspection of the existing 23,000-square-foot architectural asphalt shingle roof. Our commercial roofing team evaluated the condition of the shingles, flashing, roof decking, ventilation, drainage, and structural components to develop a complete replacement strategy. Years of exposure to Montana's high winds, heavy snow, UV exposure, and seasonal temperature swings had taken their toll on the roofing system. Careful planning allowed us to coordinate one of the region's largest commercial asphalt shingle roof replacements while minimizing disruption and preparing the building for a premium roofing system built to perform for decades.
Demolition
Preparing the Roof for Long-Term Performance
Replacing a 23,000-square-foot commercial roof requires much more than removing old shingles. Montana Pro Contractors completed a controlled commercial roof tear-off, carefully removing the existing architectural shingles, underlayment, flashing, and worn roofing materials while protecting the occupied facility below. Once the roof deck was exposed, our team inspected the substrate for moisture intrusion, structural concerns, and areas requiring repair before new materials were installed. A complete demolition ensures hidden issues are corrected instead of covered, providing a clean, structurally sound foundation for a premium commercial roofing system capable of withstanding Montana's demanding climate.
Underlayment
Building Protection Beneath Every Shingle
Exceptional roofing performance starts below the finished roof surface. After preparing the roof deck, Montana Pro Contractors installed premium roofing underlayment and ice-and-water protection across the entire 23,000-square-foot roof. This secondary moisture barrier protects against wind-driven rain, snow infiltration, and water intrusion while strengthening the overall roofing system. Proper underlayment, combined with updated flashing and precision installation, creates an additional layer of defense that extends roof life and maximizes the performance of the finished roofing assembly. Investing in quality materials beneath the shingles is essential for commercial buildings expected to perform through Montana's severe winters, high winds, and changing weather conditions.
CLASS 4 MALARKEY VISTA® AR ARCHITECTURAL SHINGLE INSTALLATION
Premium Commercial Roofing Built for Montana
The final phase of the project featured installation of Malarkey Vista® AR Class 4 architectural asphalt shingles across the entire 23,000-square-foot commercial roof. Manufactured with SBS polymer-modified asphalt, Vista® AR shingles deliver exceptional flexibility, impact resistance, and long-term durability while providing one of the highest-performing architectural roofing systems available. Their Class 4 impact rating offers outstanding protection against hail, wind-driven debris, heavy snow, and severe Montana weather. Every shingle was installed according to manufacturer specifications by the experienced commercial roofing professionals at Montana Pro Contractors to maximize waterproofing, wind resistance, and roof longevity. The completed roofing system enhances the appearance of First Interstate Bank while providing decades of dependable protection, making this project an outstanding example of large-scale commercial roof replacement completed with premium materials and expert craftsmanship.
