What is EPDM?
EPDM, or ethylene propylene diene terpolymer, is a synthetic rubber material commonly used in low-slope roofing membranes. EPDM is popular among roofers and building owners due to its relatively low price point, quick installation and ease of maintenance. The material is created primarily from recycled tires – and is remarkably lightweight – and can be laid out in sheets or rolled out in sections available in a range of widths, from 7.5 to 50 feet and choice of thicknesses, from 45 mils to 90 mils.
Known by many as “rubber roof,” EPDM is widely revered in the roofing industry for its long useful life, low carbon footprint and different assembly method options. While EPDM is commonly used in commercial and industrial roofing, this material’s versatility enables it to also be utilized for residential purposes such as carports or roof patios. Regardless of the building it’s installed on, EPDM has great potential in areas such as reflectivity, cost savings and low maintenance. If you want to learn more about energy efficient roof options, visit our page on Cool Roof Technology.
Performance & Sustainability
EPDM’s layered composition is extraordinarily durable, with high resistance to fire, thermal shock, punctures, rain and wind. If damage does occur, it’s fairly easy to fix using a patch or a layer of liquid membrane.
ConfigurationsEPDM Roof Assembly Options
- Sheets of insulation are adhered or mechanically fastened to the decking
- Sheets of EPDM are attached to the insulation using bonding adhesive, with the sheets’ edges overlapping one another.
- Seams are sealed with seam tape.
- The perimeter of the roof, as well as any penetrations, are flashed according to technical specifications.
- Insulation is laid on the roof decking and fastened using adhesive or mechanical fasteners.
- EPDM sheets are laid on top of the insulation, overlapping the edges of the sheets.
- Seams are sealed with seam tape and then mechanically fastened.
- The edges of the roof and any penetrations are appropriately flashed.