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

Your Commercial Roofing Company

Grell Roofing, Est. 1985

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.

We’ve been a Dealer and Elite Roofing Contractor with Duro-Last Roofing, Inc. 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. duro-last-elite-contractor

Why Choose Grell?

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: Tell us what your roofing needs and concerns are, and about your current roof history and situation. 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. Awarded Duro-Last Elite Contractor 15 Years in a Row: A mark of a contractor’s significantly high-quality standards over time, as verified by 3rd party Quality Assurance personnel.

What We Do

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


Our Job Site is Your Job Site. We often hear from owners and managers that they hardly noticed we were there, roofing their building, as customers and employees came and went. And that’s a good thing. There’s no reason your staff should feel like they need to wear a hard hat to walk into their workplace. Grell Roofing runs a safe and clean job site, as we value safety for our workers and yours.  

National & Regional Accounts

Work smarter by having one firm repeat a positive experience across your facilities, instead of repeatedly processing bids from several local firms for each job at every location. Do you own or maintain a portfolio of building sites? We may be able to provide an easy solution to your roofing problems and a single point of contact for your roof maintenance needs. Perhaps you’re happy with a Grell roof on one of your properties and would like to apply this quality and value to other properties. Work smarter by having one firm repeat a positive experience across your facilities, instead of repeatedly processing bids from several local firms for each job at every location. Go with what works. Contact us for details on corporate accounts. Have experts monitor your roof system and save time and expense. We offer maintenance contracts. This means, among other benefits, we inspect your roofs every year and report any problems and how to address them. This way you have one less thing to worry about, and you’re positioned to save time and money. Keeping up with maintenance, instead of facing eventual surprise system-failure expenses and disruption, is what you do for your car tires and engine. So why not your building roofs? Keeping up with maintenance, instead of facing eventual surprise system-failure expenses and disruption, is what you do for your car tires and engine. So why not your building roofs? Our national and regional account services may be appropriate for:
  • A manufacturer with sister plants in different states,
  • A federal, state, or local government building manager in charge of keeping efficiency up to code,
  • A network of educational campuses,
  • A multi-state religious organization,
  • A regional retailer, warehouse, logistics firm, distributor,
  • A national real estate management corporation or investment trust,
  • A bank or financial servicer; Engineering, marketing, media, or other professional services firm with branch offices,
  • A chain of service centers.
Did we leave out your building portfolio niche? Please let us know.