WHAT IS EPDM?
ROOFING SYSTEM
ETHYLENE PROPYLENE DIENE MONOMER ROOFING SYSTEMS
EPDM, or ethylene propylene diene monomer, is a rubber material popular for creating a waterproof surface on flat roofs. There are two varieties of EPDM roofing in terms of the membrane material. Vulcanized sheeting is cured and has a uniform appearance that allows the sheet to retain the original size on shipment.
Non-vulcanized roofing is uncured and is typically used for flashing or smaller areas that do not require a set size in the flexibility of the material. The seams are overlapped, and both vulcanized and non-vulcanized material can be bonded together for a strong seam.
PROS
Can be coated white for reflectivity, while black is more efficient in colder climates
Since it is rubber, it can easily stretch and fit any roof
Strong resistance to UV light and thermal shock
Resistant to hail damage
CONS
Extreme heat can cause the membrane to shrink, putting pressure on the seams
Seams are sealed with adhesives and tape, so they often fail and allow leaks
Black roofs are very energy inefficient for warmer climates
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