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GenFlex Roofing Systems is a leading, full-line supplier of high quality single-ply roofing products for the commercial roofing market. Our products have a strong history. Roofing has long defined who we are and what we do. With nearly 30 years in the single-ply industry, we bring native expertise to every product, system and accessory we offer.

Headquartered in Indianapolis, Indiana, we manufacture, market, and sell our products through our network of distributors and authorized roofing contractors.

Thank you for visiting our website. As you navigate through, you will find a thorough offering of product information, installation training videos, MSDS and product data sheets, and access to our knowledgeable team of technical, sales and customer representatives.


We have produced a number of significant industry first. For example, in 1981 GenFlex became one of the original suppliers of EPDM systems. In 1996 GenFlex developed the first 12-foot-wide TPO sheet to meet industry code requirements. GenFlex launched the revolutionary Peel & Stick system in 2003, one of the most significant advancements in roofing in the past decade.


We offer a wide selection of roofing products, systems and accessories to help achieve the specific goals of your application.


We were the first to introduce a loyalty plan, the GenFlex Winner’s CircleTM that recognizes both contractors and distributors, helping to advance the way we work with our customers and help them succeed, too.


GenFlex EPDM products withstand the test of time.

GenFlex Roofing Systems features three single-ply EPDM membranes: GenFlex EPDM (Ethylene Propylene Diene Monomer) – an elastomeric membrane GenFlex AFR an EPDM membrane that is fire retardant, and GenFlex FRM – an EPDM membrane reinforced with tough polyester fabric. Both are designed for ultra high performance. GenFlex EPDM systems have a performance history of over 20 years and can be warranted for up to 20 years depending on the system design

EPDM comes 45 mil (1.1mm) or 60 mil (1.5mm ) thick and is available in rolls up to 50′(15.2m) wide by 250′ (76.2m) long. It is ideal for either new roofs or for roofing over a variety of common roof deck types and insulation materials

Installation systems include ballasted, fully-adhered and a number of mechanically-attached alternatives. Components include roofing tapes, bonding adhesive, sealants, flashing and applicable rooftop accessories

This is a high-performance membrane, resistant to tears, impacts, punctures and normal roof traffic. Normal structural movement has limited effect on its integrity. This membrane provides excellent resistance to ozone and ultraviolet light exposure.


GenFlex TPO membrane was introduced in 1996 and is manufactured at our state-of-the-art extrusion technology facility in Muscle Shoals, Alabama, where we have produced the industrys first 12-foot wide sheet meeting industry code requirements

The 12-foot wide sheet offers significant benefits including fewer seams to weld and fewer panels to install. With fewer seams and fewer panels for most applications, there is a significant cost advantage to a 12-foot fully adhered system. Compared to a 10-foot system, the wide sheet application requires 16% fewer seams33% fewer than an 8-foot system, and 50% fewer than a 6-foot system

GenFlex TPO membrane, a high quality thermoplastic polyolefin, offers the best of both worlds…the proven flexibility and weathering resistance of rubber and the performance of hot-air welded thermoplastic seams. Heat-welded thermoplastic roofing membranes are the fastest growing segment of the low-slope roofing market and GenFlex TPO is an excellent system choice.

GenFlex TPO roofing systems are designed for durability and to withstand extreme environmental exposure. GenFlex TPO systems offer the widest selection in both product and system types. From dual weld seams to Peel & Stick systems, GenFlex has the TPO products you need for mechanically anchored to fully adhered systems with warranties up to 20 years depending on the system design

Introduced in 2003, the GenFlex Peel & Stick TPO Membrane System is truly a revolutionary new era in roofing. Peel & Stick TPO membranes and accessories have pre-applied adhesive and tape, making installation faster, easier, safer and smarter. Now available in a 10-foot roll as well.


Genflex Polyiso is perfect for use with virtually all membrane roofing systems. Genflex is tapered to provide a sloping surface to promote positive draining for roofing applications.

Polyiso is highly efficient thermal insulation board with polyiscocyanuarte foam core bonded to fiber-reinforced facers. It is approved for new construction and for reroofing over steel, wood, non combustible and certain types of nail able roof decks. It can be installed as a fully adhered system, mechanically attached or ballasted.

GenFlex Polyiso comes in a standard size of 48 X 49 and 48 X 96 and thickness ranging from 1 inch to 4 inches.

Tapered Polyiso comes in one standard size 48 X 48 with thickness ranging from 0.50 to 2.5.

The tapered Polyiso is available in three degrees of slope per foot: 1/8, and .