Stevens EPô Roofing Membrane

TPO Membrane Choices

The World's First Reinforced TPO Roofing Membrane

Stevens EPô brand of TPO is the world's first reinforced TPO (thermoplastic polyolefin) based roofing membrane.  It is formulated from a proprietary compound of ethylene propylene rubber and polypropylene.

Stevens EPô membranes exceed the ASTM D-6878-03 specification for TPO roofing. They are environmentally friendly roofing materials from cradle to grave that provide outstanding weatherability, fire and chemical resistance. The seams and details of a Stevens EP roof are hot-air welded to create a bond stronger than the material itself.

Applications, Width and Thickness

Stevens EPô is ideally suited for virtually all commercial, industrial and institutional applications, both for new construction and re-roofing. The material is available in nominal 45 and 60 mil thickness (1.14 mm and 1.52 mm) and comes in standard 100-foot length rolls.  For surpassed puncture resistance and durability, Stevens also offers Stevens EP-XL, an 80 mil (2 mm) thick material.

Stevens EPô is available in widths ranging from 38.25" to 151" and lengths of 75' to 300' to best fit the design criteria and code requirements of your roof. Many Stevens membranes can be produced in custom lengths (100'
minimum) to eliminate seams and speed up the installation process.

Attachment Options

Stevens EPô membranes can be installed using several methods, including:

  • Mechanically Attached
  • Stevens EPô FastLine Adhered
  • Fully Adhered
  • Stevens GardenTopô vegetated roof system
  • Stone Ballasted
  • Paver Ballasted
  • Vented Roofing System (VRS)
Choice of Colors

Stevens EPô is available in a choice of nine architecturally pleasing colors including:

  • Energy Efficient White*
  • Light Slate Gray
  • Pewter
  • Buckskin
  • Desert Brown
  • Patina
  • Dark Ivy Green
  • Neon Blue
  • Terra Cotta

All Stevens EPô colored membranes are reinforced for added strength and durability and available in 60 mil thickness. 45 mil reinforced membrane and 55 mil unreinforced material is available in all colors for flashing. Pre-molded corners (inside/outside), pipe boots and vent gloves are also available in Energy Efficient White and Light Slate Gray.

* White Stevens EPô membranes meet the EPA Energy Star Roof Products Program requirements, are California Title 24 compliant and may qualify for points in the U.S. Green Building Council LEED Program.



ISO Certification

In addition, all Stevens EP membranes are manufactured in an ISO 9001:2001 registered facility.

Substrate Compatibility

Stevens EPô membranes are suitable for direct contact over:

  • EPDM
  • CPE
  • CSPE
  • PVC
  • NBP
  • EIP
  • Neoprene
  • Aged Asphalt BUR
  • Aged Modified Bitumen

Model Building Codes

  • ICC-ES
  • Miami-Dade County Approved
  • City of New York
  • Texas Department of Insurance
  • UL Classified
  • FMG Approved
  • UL Canada
  • British Board of Agreement (BBA)
  • Dutch Board of Agreement (DBA)
Fire and Wind Resistance

Stevens EPô membranes have achieved UL Class A fire resistance classifications (UL 790) over selected polyisocyanurate, gypsum and wood fiber insulation and recover boards boards, and unlimited slope over Gypsum.  Consult the current UL Roofing Materials & Systems Directory for complete details and listings.

Mechanically attached Stevens EPô has achieved Factory Mutual Windstorm Classification Ratings of 1-60 up to 1-195.

Fully adhered Stevens EPô can achieve 1-270 and 1-315 Windstorm Classification under specific conditions. Consult the current FM Approval Guide for complete details.

Stevens EPô has numerous NOAs granted by Miami-Dade for a wide range of deck types and constructions.

Warranty Options

Stevens offers warranties on successfully completed roofs installed by a Stevens Authorized Applicator. These warranties range in scope from coverage of the materials only to that of the entire system assembly for a time of 5 years up to, for some systems, 20 years.

TPO Membrane Choices

Depending on your application, Stevens has a TPO membrane for you.  As a leading global manufacturer of TPO, Stevens has developed several TPO membranes for specific applications.  Besides our standard TPO membranes, we also offer: