Some say that s good and some say that s bad.
Pvc rubber roofing used for.
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.
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Epdm is a synthetic rubber and it is fair to say that its main characteristic is that it is black.
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.
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Also pvc can actually be recycled and is used over again in production of new pvc membranes as material for the bottom ply.
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.