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SPI Distribution is your roofing replacement source.  We are a certified Duro-Last® roofing installer.
Duro-Last® Roofing Systems: Edge-to-Edge & Deck-to-Sky™. Known as the “World’s Best Roof®”, Duro-Last, Inc. is the world's largest manufacturer of custom-fabricated, thermoplastic single-ply roofing systems.

Duro-Last Roofing Systems

The custom-fabricated, single-ply PVC Duro-Last commercial roofing system is ideal for any flat or low-sloped application. Extremely durable and easily installed by authorized Duro-Last contractors without disrupting building operations, the Duro-Last Roofing System is also watertight, highly reflective, resistant to chemicals, fire and high winds, as well as low maintenance.

Proven Performance

Since 1978, billions of square feet of Duro-Last membrane have been installed throughout North America – and through our best-in-class warranties, Quality Assurance department, prefabricated commercial roofing systems approach and commitment to provide problem-solving products, we work hard to stand by every square foot.


Duro-Last is the only roof manufacturing company to offer prefabrication of the entire roofing system in our factory-controlled environment. Through our custom-fabricated commercial roofing systems – which can include both membrane and accessories – up to 85% of the seams are completed before it arrives on the job site. A custom-fabricated Duro-Last Roofing Commercial Roofing System is long-lasting, reliable and eliminates most of the on-site fabrication that can lead to roof leaks.

Controlling our Destiny

Duro-Last is a leader in vertical integration. Since the beginning, our founder, John R. Burt, strived to produce as many parts of a Duro-Last assembly in-house while also embracing the Edge-to-Edge & Deck-to-Sky™ approach. All of this allows Duro-Last to control quality from top to bottom.


The Duro-Last Difference


Metal Retrofit Roofing System Brochure

Duro-Last Roofing Metal Retrofit Project

Schools Trust a Duro-Last® Roofing System

Duro-Last is highly experienced in providing roofing for school buildings. Duro-Last provides roofing solutions for school buildings no matter what the size of your space is. Our flagship Duro-Last membrane can have up to 85% of the membrane seaming completed in our controlled factory environment. We also offer custom-fabricated accessories for all of our membranes – making all Duro-Last Roofing Systems predictable and durable.

School building roofs must be durable, safe, and provide a secure
environment for both students and teachers. Duro-Last Roofing
Systems provide protection from harsh weather situations and
because of their durability and proven performance to bad weather,
these roofs are excellent for school buildings.

Installed with No Disruptions

Another great benefit of using a Duro-Last roofing solution for school
buildings is that installation is quiet and safe, without loud machinery,
hot tar, or a mess. This means that your school’s roofing system can
be installed without disrupting day-to-day school activities. 
Duro-Last Roofing Systems come with industry leading warranties. We deliver long-term value for your school.


Duro-Last® Custom-Fabricated Roofing Membrane

Roofing System Overview

Duro-Last, Inc,. offers over three decades of proven PVC roof system performance with billions of square feet of membrane installed across North America. Duro-Last has been successful since the beginning by providing our customers with unmatched service and expertise in the roofing industry.

Single Ply Roofing Information

  • Roof Membrane available in 40, 50 and 60 mil thickness.

  • Duro-Last 50 mil membrane is manufactured with 28 mil of thickness on the top performance layer, far exceeding industry standards as well as competitor systems with equal and even greater mil values.

  • Only product in the marketplace to offer prefabrication of the entire roofing system.

  • A complete line of Duro-Last custom prefabricated accessories is available for all Duro-Last membranes.

  • Single ply membrane has a weft-insertion anti-wicking scrim with a density of 18 by 14 threads per inch – among the highest in the industry.

  • Unique in the industry, Duro-Last offers a 15-year warranty with consequential damage coverage for Duro-Last prefabricated roofing systems with no additional charge. This warranty is only available for commercial applications.

  • For single ply roofing membrane warranty information, click here.

The Duro-Last Difference

It's not just top-notch products that set Duro-Last apart from the competition. Click here to learn more about the services Duro-Last provides to go above and beyond for our customers.

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