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Saturday, 20 Jul 2019

Duro-Last is The "World's Best Roof"

Duro-Last is The "World's Best Roof"

Duro-Last's custom-prefabricated, reinforced, PVC roofing system is ideal for any flat or low-sloped application. Extremely durable and easily installed by authorized contractors without disruption to daily operations, the Duro-Last single-ply roofing system is also leak-proof, resistant to chemicals, fire and high winds, and virtually maintenance-free. Over a billion square feet of the Duro-Last PVC roofing system membrane have been installed on all types of commercial, industrial, and institutional buildings across the globe. Prefabrication of Duro-Last's PVC roof membrane not only reduces the material waste associated with the installation of most rolled systems, it also eliminates 80-85% of the typical on-site, labour-intensive seaming required for other single-ply roofing systems. The Duro-Last roofing system also comes complete with all accessories included.

The Duro-Last vinyl roof membrane is a proprietary thermoplastic formulation consisting of PVC resins, plasticizers, stabilizers, biocides, flame retardants and U.V. absorbents. A weft-insertion knitted scrim that is laminated between two layers of PVC film gives the membrane its strength and durability. The Duro-Last membrane is available in white, tan, grey, or dark grey.

The highly-reflective Cool Zone membrane helps reduce energy consumption. The Cool Zone system can often be installed over your existing roof, eliminating a costly tear-off and reducing landfill waste.
The tightly-controlled manufacturing process recycles scrap back into roofing membrane and other products. When your time is right for a photovoltaic system, the Cool Zone system is solar-ready. And after its useful life on your rooftop, the membrane is recyclable.

Key Benefits
• No Disruption To Your Business
• Installed Year-Round with No Messy Clean-Up
• Fire Retardant
• Energy Efficient
• Wind Resistant
• A Proven Track Record Of Success
• 15-Year Limited Or 20-Year Prorated Warranties
• Leak-Proof
• Maintenance-Free
• Installed By Professionals
• Inspected By Duro-Last Quality Assurance Specialists

Duro-Last Roofing, Inc. has been the pioneer of custom prefabricated single-ply roofing systems.
For over 30 years, Duro-Last has been The Proven Performer, with over 11⁄2 billion square feet of membrane installed. This position of distinction has led industry leaders, corporations, and sources of specifications throughout the country to recognize our contributions to the roofing industry.


The Duro-Last membrane is a proprietary thermoplastic formulation that provides exceptional flexibility, reflectivity, resistance to U.V. radiation, and flame retardance. Roofing system performance is a balance between film formulation, membrane thickness, and reinforcement.
Duro-Last adds no "filler" material to increase the membrane thickness; our film is the same proven formula from top to bottom. Plus, our membrane's over-scrim thickness is equal to or greater than that of many competitive single-ply products.

A key Duro-Last difference is the reinforcement scrim within the membrane. It's a weft-insertion scrim with a density of 14 x 18 threads-per-inch – among the highest in the industry. The Duro-Last 40-mil membrane is classified as a ASTM D4434 Type IV PVC roofing system, but the strength characteristics pass all the standards for 50-mil products, which are classified as ASTM D4434 Type III PVC.


• Hot air welding bonds all Duro-Last field seams
• Welds are done with a hand-held unit or "walker" welder
• No chemicals, torches or other unsafe seaming methods are used
• The Duro-Last membrane is non-curing; patches, curbs, stacks or other alterations can be easily heat-welded to the membrane throughout the life of the system
• The membrane can be installed over most new or existing substrates; it is watertight and virtually maintenance-free
• The need for costly tear-offs and disposal can often be eliminated