

GRINNELL MUTUAL
Location: Grinnell, Iowa
Industry: Insurance
Facility Type: Commercial Headquarters
Roof Area: 85,000+ square feet
Challenges:
- A roof system that was underperforming
- Repeated internal repairs
- Risk of voided warranties due to improper installation
Services Provided:
- Full Duro-Last roof replacement
- Removal of failed ballast system
- Custom installation across complex roof structure
Award:
- 2024 Duro-Last Project of the Year


A Big Building with a Big Problem
Grinnell Mutual’s roof was leaking, patch jobs were piling up, and the original install had left the warranty at risk. As a mission-critical facility, the building required a long-term solution and minimal disruption to operations.
Precision Planning, Lasting Results

Precision Roofing Materials Built to Perform

See the Full Story
“85,000+ square feet installed without issue.”
“Every detail was planned, inspected, and executed precisely.”
“Duro-Last recognized this as the standout project of the year.”
What Success Looks Like
Trusted When It Matters Most
“May 7th is a day we’ll always remember at Grinnell Mutual. A major hailstorm hit with 80-mile-an-hour winds and softball-sized hail. Our building and grounds director got the call, and within hours, Jake and John from Duerson were on our roof—through the night—finding every hole. By the next morning, it was all hands on deck.”