Do You Have A Duro-Last or Flat Roofing Project in the Seattle or Bellevue areas?

The Leading Duro-Last Roofing Contractor serving the Seattle area. Family owned and founded in 1982. Installing and servicing flat roofing over 40 years.

A Leading Approved Duro-Last Contractor

Commercial Roofing

We offer full commercial roofing services for buildings both large and small.

Serving the Greater Seattle Area

Check out our service page on Commercial Roofing to learn more about our process.

Why Choose Us

Serving the PNW since 1982, earning our customer's trust with our average 99% quality assurance rating.

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Check out our service page on Roofing Contractors to learn about how we can help.

Duro-Last Roofing

Custom fabricated roof system, trusted by building owners from coast to coast.

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Check out our service page on Duro-Last to learn more about the materials we use.

square feet installed of Duro-Last alone!

Explore Recent Work

Please click on the thumbnails below for some examples of Alternative Roofing Systems commercial roofing jobs.

Alternative Roofing Systems, Inc. is a leading approved contractor of Duro-Last roofing in Washington. We are a commercial roofing contractor with over ten million square feet of roofing installed. We have done large-scale installations in the Northwest for many companies you know and on buildings you’ve likely driven by.

Contact Form

Looking for help with a commercial roofing project? As a leading certified Duro-Last roof installer in the Seattle area, we are qualified to meet your commercial, flat, and low slope roofing needs. Contact us today!