Single Ply Roofing


Single-ply flat roofing membranes have grown in popularity over the past 40 years due to their flexibility, ease of installation, and competitive price.


EPDM is a rubber material whose principal components consist of the compounds ethylene and propylene. A flexible rubber matrix forms when a small amount of diene is added to the mix. EPDM is available reinforced or unreinforced with both commonly used. EPDM membrane thickness ranges from 45 mil (.045″) to 80 mil (.080″) with the most common thicknesses being 45 mil and 60 mil. The seams are sealed using either an adhesive or a splice tape.


TPO membranes are single-ply roof membranes constructed of a combination of thermoplastic poly-olefin and ethylene propylene rubber. They are designed to combine the durability of rubber with the proven performance of heat weldable seams. They have been tested as having excellent resistance to ozone, are algae-resistant, environmentally friendly and safe to install. TPO is highly resistant to tears, with good flexibility to allow for building movement. TPO’s are available in white, light gray, and black with thicknesses of either 45 mil (.045″), 60 mil (.060″), 72 mil (.072”), or 80 mil (.080”).


PVC, or polyvinyl chloride membrane, is similar in look and application to TPO as it also has heat weldable seams. It has been known to be highly resistant to chemicals such as acids, bases, restaurant oils and greases. PVC’s are available in thicknesses of 50 mil (.050”), 60 mil (.060”), and 80 mil (.080”).

There are three standard application procedures for single-ply systems:

  • Fully adhered
  • Mechanically attached
  • Ballasted – held in place with river rock or concrete pavers
Sela Difference

We employ our own crews to ensure your asset is handle with care from the beginning of the project through the end.