EPDM featured in “Solar installers scale dormant volcano to power astronomical research”

“You have what you call an inverted membrane roof system, and it’s unique, probably the only one in Hawaii,” he said. “But someone had the foresight back when they designed the facility to do this and it’s amazing, because the cinder acts like an insulator from both the weather conditions and the UV from attacking the EPDM. … And it works. After 27 years under that cinder, according to inspection, the EPDM appeared brand new. To maintain the roof’s integrity, the solar system is ballasted with steel plates that are either 150 or 275 lbs and 2-ft or 3-ft squares. The plates rest on the EPDM, and the cinder was replaced, covering the ballasts.”