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Chemical Resistance & Roofing

Duro-Last is inherently resistant to animal fats, grease, and a wide array of chemicals. If your building has grease fans, ducts, kitchen exhausts and HVAC units, using a polyvinyl chloride (PVC) membrane can help.  If your roof is exposed to caustic chemicals, petroleum products and acids, a PVC membrane will be your best LONG-TERM solution. 

Duro-Last has roofed some of the biggest businesses in the US. Duro-Last, Inc,. offers over three decades of proven PVC roof system performance with billions of square feet of membrane installed across North America.

Check out this 50 mil Product Data Sheet for additional information about the rigorous testing and physical properties.

 CALL: (740) 323-3174



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Why is PVC roofing superior?


PVC = Polyvinyl Chloride

  • – Vinyl is flame resistant
  • – PVC Membranes are flexible
  • – PVC is lighter weight that other materials
  • – Strong puncture resistance and breaking strength
  • – PVC is heat-weldable
  • – Vinyl roofs are highly reflective
  • – PVC is resistant to chemicals
  • – Vinyl is recyclable

PVC, also commonly known as vinyl, is composed of two main components: ethylene and chlorine. Petroleum or natural gas is processed to produce ethylene, while chlorine is derived from salt. In the compounding process, vinyl resin is blended with plasticizers, heat-stabilizers, ultraviolet (UV) light inhibitors, biocides, and color pigments.

A PVC roof is a single-ply membrane composed of two layers of PVC material with a polyester reinforcement scrim in between. The top ply contains special additives that make the membrane UV resistant and prevent curing. Additionally, the top ply contains plasticizers that make the membrane flexible and pigments for color. The bottom ply is a black PVC, containing more plasticizers for flexibility and typically no other additives or fillers. Additionally, polyester or fiberglass reinforcement is added to achieve high tearing and breaking strengths necessary for mechanically fastened single-ply roofing systems.

Duro-Last recycles virtually all its own manufacturing waste. On job sites, it is safer for contractors to handle than other roofing materials that require VOC adhesives, hot tar (which has a very high carbon content, by the way), etc. Unlike other systems, PVC roofs can be recycled at the end of their service lives and Duro-Last has a program in place to do just that.



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Project Profile: Mid State Warehouses

Check out this project profile featuring Mid State Warehouses.  The All Weather Systems team was able to install 180,000 square feet of Duro-Last 50 mil pre-fabricated membrane in just 12 days from start to finish.  We are very proud to have been able to meet the demands of this project so efficiently.


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Commercial Roofing Company Goes Platinum!



All Weather Systems has gone Platinum!

After every commercial project is installed, Duro-Last dispatches a Quality Assurance Inspector who grades our installation.  Achieving Platinum status means that we installed more than 500,000 square feet in 2017 AND scored more than 95% on average.  To say we are proud is really an understatement!

The Platinum classification is the highest achievement within Duro-Last. Less that 4% of Duro-Last contractors nationwide have reached this level. 

How did we earn such an award? Our team begins with the end in mind. Our goal is to become a long-term roofer for our customers, not just a company that was used once. 

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Roof Warranties

Why Read the Warranty?  Warranties are boring.

No big surprise here right? As boring as they are, the roof system and the warranty are all that’s left after a roofing crew leaves your job. It’s imperative to understand the warranty. Let’s talk about the Duro-Last Warranty and what makes it the best in the roofing industry.

The standard warranty covers consequential damages. This means if you experience a roof failure due to workmanship or labor, Duro-Last will cover the damages, floor to ceiling.

Second, it doesn’t disclude for ponding water. You aren’t on your roof every single week, so no worries if you experience ponding water, you’re covered.

Lastly, Duro-Last requires zero maintenenace. Some warranties require you to have inspections on your dime, Duro-Last does not.


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