Mint Roofing Case Study
Introduction
Grazzini Brothers & Company is a long‑standing commercial flooring and surfaces specialist based in Eagan, Minnesota. Their headquarters sits just 2.5 miles from Minneapolis–St. Paul International Airport, directly under a busy flight path. The rooftop displays the Grazzini name, a large arrow, and the word “Airport,” pointing toward the MSP runway and creating a recognizable landmark for planes flying to and from the Twin Cities.
Over time, the low‑slope roofs on the office and warehouse sections had reached the end of their useful life. Chronic ponding, leaks, and shrinking membrane began to affect interior spaces and put this high‑visibility facility at risk. Grazzini needed to replace the aging roof systems in a way that protected the building, respected day‑to‑day operations, and preserved their distinctive rooftop branding.
Challenge
The existing roof system presented several issues that had developed over years of exposure. Flat insulation allowed water to sit on the membrane instead of draining away. Chronic ponding led to leaks, especially along walls and in ceiling tile areas. The rubber membrane was shrinking, pulling at the walls and requiring wood blocking to keep them aligned.
These conditions created operational and strategic challenges. Internally, staff were dealing with recurring cleanup, stained ceilings, and increased risk to interior finishes and equipment. Externally, the company was approaching its 100th anniversary and wanted its headquarters, visible from MSP’s flight path, to reflect the reliability and craftsmanship that define their work across the country. Any roofing solution needed to address the technical issues while maintaining the rooftop logo, arrow, and “Airport” message that make the building easy to spot from the air.
The Mint Roofing Solution
To address these challenges, the project team began with a detailed inspection of each roof section. They documented membrane conditions, ponding patterns, drain locations, and areas of interior damage. Based on these findings and Grazzini’s goals, they recommended EPDM (ethylene propylene diene monomer) as the primary roofing material, installed in two different system types to match performance and branding needs.
Over the office area, they installed a ballasted EPDM system. This approach uses stone to hold the membrane in place and provided a cost‑effective solution that aligned with the existing configuration. Over the warehouse, they selected a fully adhered EPDM system, gluing the membrane directly to the substrate. This created a smooth surface that makes punctures easier to see and repair and serves as an ideal canvas for the rooftop logo, arrow, and “Airport” lettering.
To solve the drainage problem, the team designed a tapered insulation system that introduced slope where none had existed. They added new roof drains and rain leaders to move water off the roof efficiently and reduce the risk of standing water. Because the project touched mechanical, electrical, and plumbing systems, the roofing team acted as a turnkey provider. They coordinated raising curb units, connecting new drains, and adjusting related equipment, while staying in close communication with Grazzini’s staff about schedules and interior access.
Weather Event and Process Improvements
During the course of the project, a significant weather event tested both the new system and existing procedures. Late in the day, some roof sections remained open. Radar appeared favorable, and sealing work was planned for the next morning. Overnight, conditions changed and heavy rain moved across MSP’s flight path, hitting the open areas and causing interior damage in both office and warehouse spaces.
The contractor responded quickly, mobilizing cleanup crews and working with Grazzini’s staff to address affected areas. They also compensated the company for staff time spent on cleanup activities. Internally, they treated the incident as a catalyst for change. Policies regarding open roof conditions and overnight exposure were tightened, with a new emphasis on treating every night as if a major storm could arrive. These improvements help reduce risk for future projects and protect other facilities in similar situations.
Results
The roof replacement project has been highly successful. The tapered insulation and new drains have eliminated chronic ponding and reduced leak risk, especially around walls and ceiling tile areas. The fully adhered EPDM over the warehouse makes inspections and repairs more straightforward and provides a stable surface for Grazzini’s rooftop graphics. The logo, arrow, and “Airport” message remain clearly visible to aircraft traveling to and from MSP International Airport.
Turnkey coordination of roofing, mechanical, electrical, and plumbing work helped keep the project organized and minimized disruption for staff working inside the building. Despite the weather‑related setback, the relationship stayed strong, and the new roofs now support both the brand and the people managing complex flooring projects across the country.
Conclusion
The Grazzini Brothers & Company roof replacement demonstrates how thoughtful system selection, improved drainage design, and clear communication can turn an aging commercial roof into a reliable asset. It also shows the importance of strong processes and accountability when unexpected weather affects work in progress.
By focusing on long‑term performance, rooftop branding, and day‑to‑day operations, the project delivered a solution that protects a highly visible headquarters and gives the company confidence in the roof above its team.
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From new commercial roof construction to roof repairs and replacement, our job isn't finished until every customer is dry and they stay that way! Contact us today to learn more about our roof replacement services or to schedule a roof inspection.