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The Commercial Roofing Contractor in Washington. Specialists In Flat Roofing Installation, Replacement and Service

Seattle’s #1 Certified Duro-Last Installer

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.

Commercial Roofing

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.

Roofing Contractors

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.

Duro-Last Roofing
Sq. ft. of commercial roofing installed

Explore Recent Work

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

Alternative Roofing Systems, Inc. is the number one installer of Duro-Last roofing in Washington. We are the 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.

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