• Phone 800-208-9693
  • Email erica@grellroofingllc.com
  • Office Hours 8AM - 5PM (M-F) / 24X7 Emergency


Grell Roofing, Est. 1985 – Commercial Roofing Experts

For 30 years and more than 5 million square feet of roofing application, Grell Roofing has served Iowa and the Upper Midwest’s commercial and industrial roofing needs. We’re a family-owned firm with an outstanding reputation for workmanship, quality, and customer support. Additionally, all Duro-Last roofing is manufactured and created in the state of Iowa. Grell Roofing LLC is fully licensed, bonded and insured. We take the responsibility of safety and quality seriously. We’re proud to say we’ve been a Duro-Last Elite Contractor for over 15 years. To read our latest achievement click on this link Duro-Last Elite Award.

What We Do

  • New Construction
  • Preventive Maintenance Contracts
  • Metal Retrofit Roofing
  • Thermal Imaging
  • Energy Efficiency Retrofits & Insulation
  • 24/7 Emergency Repair
  • Disaster Storm Damage Response
  • National & Regional Accounts
  • Flat Roof Specialists
  • Consultation, Inspection, Expertise

We are a Duro-Last Elite Roofing Contractor for 15 Consecutive Years

This means when Grell Roofing installs a Duro-Last roof, in order for the manufacturer to warranty the system for up to 20 years, an independent crew of quality assurance professionals goes to every job site to check every linear foot of heat-welded seam and roof protrusion before signing off on the job.

Quality is assured on Duro-Last roofing system installs by experienced personnel employed by the manufacturer, not Grell Roofing. This verification system is how Duro-Last can confidently provide one of the longest and most comprehensive warranties in the roofing industry.

For Grell to qualify as an Elite Contractor, the QA teams rarely find a substandard weld, low fastener density or vent-to-roof-area ratio, nor other checklist issues. In other words, we do thorough work that allows you to rest assured as a building owner or maintainer. Of all the decisions you have to make to keep a facility running, hiring Grell Roofing won’t be one you regret.

Adding insulation and a reflective membrane to your roofing system pays for itself, especially compared to other flat and low-slope roof types. Grell Roofing will help you find rebates, credits, or programs to make a good financial decision even better.

Our expertise

Why Choose Grell Roofing?

Our Customer is our most important asset

This philosophy is simple: When we treat our customers as we’d want to be treated, everyone benefits. Customers are happier, and happy customers recommend Grell Roofing.

Multi-Generational Experience + Superior Quality and Performance

With over 5-million square feet of experience, we are well-trained roofers and install a quality product.

Free Roofing Inspections

After a free visit to your site, a member of our experienced sales & support team will help you understand if and where you’re potentially exposed. We then propose a course of action that works within your building management constraints.

24-Hour Emergency Services

We hope you don’t suffer a catastrophic roof failure during an episode of extreme weather, but if you do, we’re ready to mobilize.

Backed by the Industry’s Best Warranties

100% labor and materials for up to 20-years.

  • Completed projects

    Over 5-million square feet
  • Years in Business

Request a Roof Inspection Today!