Roof on my Springdale not Edpm rubber...

Tpo it is...

it actually looks like a sheet of vinyl. when I installed my vortex in the head.. It was folded in. I guess I gotta be super careful when I pull those vents tomorrow

Here's a link to a roofing manufacturer that has some technical assistance pages to help you identify the types of roofing material.

http://www.alphasystemsinc.com/Product/ProductList/1

Good luck and Happy Camping!

TPO

WoodGlue