Extensive Roofing Portfolio

Installed and warrantied over 2,000 flat roofs since 1983

View roofing projects

Duro-last® Flat Roofing Contractor

#1 in Wisconsin and Consistently Among the top in the nation

Learn more about us

Roof Repair + Replacement

Leaky roof? Not energy efficient? We can help.

Learn more

Commercial Roofing Contractors in Wisconsin

Installing Flat Roofing Solutions in Wisconsin and Michigan

Roofing Services

  • Free Roofing Estimates
  • Free Long-Term Budgeting
  • Free Bid Packets including specifications and bid form
  • Maintenance and Repair Services

Save Your Energy Dollars with Nasi Roofing

Start Saving Today!

Duro-Last Flat Roofing Systems

When you need commercial roofing contractors in Wisconsin, turn to Nasi Roofing. Discover long-lasting satisfaction and durability with a reliable Duro-Last roof. Backed by the best warranties out thereā€”it's the only flat roofing system Nasi Roofing will install.

Nasi Roofing has been an Duro-Last contractor, installing commercial roofs throughout Wisconsin and Michigan since 1983. We have installed and warrantied over 2,000 flat roofs totaling over 10 million square feet of membrane.

Our commercial flat roofing company is consistently listed among the top Duro-Last contractors in the nation. With over 40 years of experience, our Duro-Last roofing contractors provide quality roofing services that your commercial business needs.

Learn about the Duro‑Last Roofing System

Metal Retro-fit Roofs

A Duro-Last roof installed over an aging metal roof by our Wisconsin commercial roofing contractors will give you a better roof than you had to originally and save you money on heating costs.

The Duro-Last roofing system is quick to install because it goes right over your existing roof, eliminating the need for costly tear-offs and disposal.

Your new metal retro fit roof will not crack or leak around penetrations, rust or corrode, require periodic maintenance, creak with temperature changes, or radiate your plant's energy into outerspace. Duro-Last roofing systems provide superior quality and durability over traditional roofing systems. Learn more about our specialty Duro-Last roofing contractors and installations today.

Learn about the Duro‑Last Metal Retro Fit Roofs

Don't worry, we've got you covered

The last thing you need to worry about is the roof over your head.

Request a roofing estimate
Duro-Last Roofing