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We work with time tested vendors to ensure we have the very best materials with the most competitive warranties in the business.


Washington Roofing Company holds a Duro-Last Master-Elite Contractor status. This program is intended to give building owners/facility managers confidence that the roofing system will be installed to high-quality standards. To qualify for these Duro-Last programs, a contractor must have installed this roofing system on a variety of buildings, and achieved consistently high-quality inspection scores over several years. Washington Roofing Company has three decades of distinction as master-elite Duro-Last installers. It offers our commercial clients exceptional value, energy savings and performance.

Reliable Quality: The Duro-Last membrane is remarkably strong, durable and flexible. Duro-Last stands by their product with 15-year and 20-year no dollar limit warranties.

Energy Efficiency: Duro-Last sets the standard for single ply roof reflectivity, which brings significant energy efficiency savings to Washington Roofing Company’s clients. A Duro-Last roof can reduce a building’s energy costs by 40% and significantly improve insulation performance.

Custom Prefabrication: After detailed systematic measurements are taken by Washington Roofing Company, your Duro-Last roof is prefabricated in a climate controlled warehouse. The Duro-Last membrane is cut, shaped and heat welded together to accommodate transitions, changes in plane, penetrations and other essential areas on your roof.

Quick, Efficient Installation: Because Duro-Last is prefabricated, the amount of field work required for installation is reduced by 80%. With the guesswork eliminated, installation is quick and precise, reducing the likelihood of rooftop leaks in the future. Washington Roofing Company is in and out in a matter of days, reducing impact to occupied buildings.

Added Benefits: The Duro-Last system can often be installed over existing roofs without expensive and laborious removal. Duro-Last offers a commitment to quality and longevity as well as an attractive face lift to existing buildings.

EXCEPTIONAL® Metals, a division of Duro-Last, manufactures high-quality metal products. Products include roof accessories, metal edge details, drainage systems, scuppers, collector boxes, pitch pans, and other custom fabricated products. EXCEPTIONAL Metals products provide a secure, watertight bond between that metal product and the roof deck membrane. Roofing installations that include single-ply products from Duro-Last and components from EXCEPTIONAL Metals are protected by a comprehensive edge-to-edge warranty.

In short, Duro-Last is simply the best product available for commercial buildings. Paired with the practiced skill of Washington Roofing Company technician, you are guaranteed exceptional and affordable quality and service.

Case Study: “Cool” Cows Produce More Milk, Thanks to Duro-Last!
WRC won a Duro-Last Award!