The vulcanized epdm is what is used as a roofing membrane.
Pvc rubber roofing used for.
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Pvc roofing membranes maintain their flexibility because the formula contains plasticizers as well as salt derived from chlorine the disadvantage of this formula is that with time these plasticizers tend to break down weakening the membrane so that it requires maintenance and repair in order to remain in tact and resistant to leaks.
Epdm is a synthetic rubber and it is fair to say that its main characteristic is that it is black.
Pvc is designed to be a cool roofing system reflecting up to 90 of sun s uv rays thereby helping to reduce energy waste from hvac systems used to cool buildings and to decrease the heat island effect.
Standing seam corrugated metal asphalt shingle tpo pvc sbs epdm.
The non vulcanized epdm is usually used for detail work or flashing of the cured roofing material.
Some say that s good and some say that s bad.