TPO (Thermoplastic Polyolefin):

        TPO is widely desirable for use as a roof system for its cost, durability, energy efficiency, and ability to be recycled. It is designed to promote longevity of the physical structure and reflect UV rays for reducing heating inside the building and on the roof. TPO is also resistant to such damaging materials as debris, dirt, bacteria and algae, which makes it even more durable. It is comprised of strong seams that are welded together.  Typical TPO membranes incorporates both a cap and core membrane with a polyester reinforcing scrim encapsulated between these layers. The cap is up to 75 percent TPO polymer with 25-35 percent fire retardants, as well as small amounts of pigment and UV stabilizers. The core membrane is similarly composed but includes up to 15 percent recycled TPO and it does not need UV protection. 

        PVC (Polyvinyl Chloride): 

          Excellent puncture and fire resistance are some of the main benefits of PVC roofing.  Additionally, a PVC roof is highly resistant to oxidation reactions. This makes it exceptionally safer than other types of roofs.  PVC is composed of ethylene and chlorine. In its compounding process, vinyl resin is blended with biocides, color pigments, heat stabilizers, ultraviolet light inhibitors and plasticizers. A PVC roof consists of a single-ply membrane composed of two layers of PVC material covering a reinforcement scrim. The top layer is UV-resistant and flexible and can take on color through pigmentation. The bottom ply is often grey or black PVC and contains more plasticizers for flexibility and weldability. The reinforcements for PVC are typically polyester or fiberglass (when not mechanically fastened) and are added to provide increased strength, longevity and dimensional stability, thus improving performance and enabling the material to be a long-term, proven roofing solution with multiple installation options.

        KEE (Ketone Ethylene Ester):

         KEE based PVC roof membranes offer superior chemical resistance, flexibility, and durability.  It is indisputably known to be the highest-performing thermoplastic roof membrane on the market.  KEE is a high-molecular-weight polymer with elastomeric properties and favorable melting properties for thermoplastic processing. It is manufactured solely by DuPont™, under the brand name Elavloy®. KEE provides additional desirable characteristics in roofing membranes, including easy heat welding due to melting properties, weather resistance, resistance to microbial growth, and retention of energy efficiency over time.

        EPDM (Cured Ethylene Propylene Diene Monomer):

         EPDM is traditionally black in color and has been available since the mid 1960’s for use as a roofing system.  The material can be extruded or calendered into sheet form and can be reinforced with a polyester scrim for higher tear strength performance. EPDM performs well because it is highly UV stable due to the carbon black component in its make-up and has relatively high installation efficiency and consistency. Well-constructed, thoughtfully installed, and consistently maintained EPDM roof systems are very resilient. EPDM systems are known for their longevity, lasting 30 years or more. They have been proven to withstand extreme weather events.  EPDM is resistant to the ozone, as well as scuffing, abrasion and impacts from hail. The roofs are durable, even against thermal shock, and resistant to heat and fire.