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More Information Flat - Low Slope Roofing Answers Search Our Site Single ply membranes continued EPDM (Ethylene Propylene Diene Monomer) Commonly referred to "rubber"  is a black single ply, with the exception of one manufacturer that has recently introduced a white epdm. Installation systems include ballasted, fully-adhered and a number of mechanically-attached alternatives. Seams are sealed using roofing tapes and bonding adhesive.   Most commonly installed is an non reinforced material, which is a lower cost alternative.  Polyester scrim reinforced material is available at a higher cost.   While we have installed EPDM in the past, it is not our preferred material, and we will only install it if it is the specification. We have seen many failed EPDM installations by others that are 10 years or less  old.  Not all failed systems can be attributed to improper installation, material failure is definately a factor in our harsh climate. These pictures are of a seven year old roof in Utah with severe material failure CPA / PVC / TPO membranes We have touched on TPO's previously, while they are sometimes compared with other similar looking membranes, the chemical components are different.  Typically TPO's are inexpensive, but do not perform nearly as well as our preferred single ply.  We do not install TPO, however we do repair it.   Following are photos of a five year old TPO installation (not installed by us).  The workmanship on installation was not to our standards , and did contribute to it's failure in some areas.  Clearly material failure was a big factor, after only five years the material was brittle.   CPA (copolymer alloy) and PVC (polyvinyl chloride) membranes are comparable in properties and performance. Where the difference lies is in chemical compostion of the material and the viability in practical applications. For roofers installing the material, the difference between the materials is more obvious due to ease or difficulty of working with it.   If a material is difficult to work with, there is a greater chance of errors or voids. We have installed and repaired PVC membranes in the past, we continue our repair operation, but have limited our installation to CPA single ply. Our preferred CPA single ply membrane is manufactured by IB Roof Systems. This single ply has a 27+ year track record without ONE material failure.  They back their material up with the longest single ply material warranty in the industry. We have installed IB CPA single ply for years, we trust the product.  Our objective in low sloped / flat roofing, is to provide our customers with the best material, quality installation, which assures a long term roofing solution We have created an information page dedicated to IB Roof Systems, click here to visit that area.     Commercial Roofing Solutions Shingle Roof Options Request a Roofing Bid Siding, Gutter, Windows, & Doors Chopped Fiberglass Seamless Roof System Re-roofing What to expect ©2002 - 2008 Schindler Roofing.  All rights reserved.