Thanks to their durability and versatility, EPDM roofing membranes are used worldwide and in various climates. But just how durable are EPDM roofs, and what contributes to their longevity?
Durability is especially important when designing buildings to withstand severe weather. The EPDM Roofing Association emphasizes that resilient roof design requires a complete system approach, including durable materials, reliable attachment methods and effective drainage.
A resilient building can adapt to changing conditions, withstand disruptions and recover after an extreme event. Its roof system plays an essential role in protecting occupants, equipment and building operations from wind, rain, hail and temperature changes.
The commercial roofing legacy behind Elevate RubberGard™ EPDM dates to 1980, when the first RubberGard EPDM roof was installed and warranted at Albo Manufacturing Co. in West Bend, Wisconsin. The original article highlighted that roof’s performance after 40 years of service, including decades of freezing winters and hot, wet summers. Individual roof performance and service life will vary.
Learn more about the resilience of EPDM roofs, the research behind their long-term performance and the factors that influence roof service life.
How Long Does an EPDM Roof Last?
The EPDM Roofing Association reports that studies of aged EPDM membranes have indicated a potential life expectancy of 50 years. This is a research finding about membrane longevity, rather than a guaranteed service life or warranty term for every roof.
Actual roof service life depends on the complete assembly, membrane selection, installation quality, climate, rooftop conditions and ongoing maintenance.
The following factors contribute to the durability and long-term performance of EPDM roofing systems.
Composition and Flexibility
EPDM, or ethylene propylene diene monomer, is a synthetic rubber roofing membrane. As a cross-linked thermoset material, EPDM combines flexibility with resistance to ultraviolet radiation, ozone and weathering.
That flexibility helps EPDM accommodate building movement and changing temperatures. Its ability to flex under impact also contributes to resilience, although hail resistance and other performance characteristics depend on the membrane and the complete roof assembly.
Long-term field studies discussed by the EPDM Roofing Association have examined membranes after decades of exposure. These studies provide evidence of EPDM’s ability to retain useful physical properties over time, while individual roof performance remains dependent on project conditions.
Installation and Attachment Methods
Common EPDM attachment methods include adhered, mechanically attached and ballasted systems. The appropriate method depends on the roof deck, structural capacity, wind requirements, roof assembly and project conditions.
- Adhered: The membrane is bonded to an approved substrate using a compatible adhesive. Self-adhered options use factory-applied adhesive. Wind resistance depends on the tested and approved assembly.
- Mechanically Attached: The membrane or an approved attachment system is secured to the roof deck with fasteners and plates or attachment strips, according to the specified system.
- Ballasted: Specified stone ballast or pavers hold the membrane assembly in place. The building must have sufficient structural capacity, and the system must meet applicable design requirements.
EPDM membrane installation does not require open-flame seam welding. Large membrane sheets can also reduce the number of field seams, although all seams, flashings and roof penetrations still require careful installation according to current manufacturer requirements.
Self-Adhered EPDM Options
RubberGard EPDM SA combines EPDM membrane with factory-applied Secure Bond™ Technology. This reduces field application of bonding adhesive and the associated drying time, helping streamline membrane installation.
The factory-applied adhesive offers a low-odor installation option that can be useful for occupied buildings. Seams still require approved splice tape or cover tape, and accessories, preparation and installation conditions must follow current Elevate technical requirements.
Membrane Color and Climate
EPDM roofing membranes are available in black and white, depending on the product selected. Black membranes absorb solar heat, while white membranes reflect more sunlight.
The most appropriate color depends on climate, insulation, building use and project requirements. Reflective membranes may help reduce cooling demand, while solar heat absorption may be beneficial in heating-dominated climates. Overall energy performance depends on the complete building and roof assembly.
Choosing an EPDM Roof for Long-Term Performance
EPDM roofing systems combine durability, flexibility and installation versatility for a wide range of low-slope commercial buildings. Selecting the appropriate membrane and attachment method, installing the complete system correctly, and maintaining the roof over time all contribute to long-term performance.
Explore Elevate EPDM roofing systems to review membrane options, technical information and product documents. Then connect with an Elevate sales representative or a licensed Elevate contractor to discuss the requirements of your project.
