GAf granual Mod Bit tourchdown vs EPDM

any thoughts on comparing these two approaches for flat roof application?

current install is liberty is being laid over tapered ISO followed by GAF rubberoid granualar MOD Bit.

do i understand manuf onthis is 12 years?

How does this stack up against .060 EPDM ?

Joe Wiso

Use fully adhered 0.60 EPDM right on taper ISO .Its much better -no base sheet . If You know specs and details you can get the 20 years warranty easily.

Im not sure about specific manufacturer's and warranties, but, in general, if you apply a fully adhered base sheet over a nailable base sheet, you can increase the warranty from 10 to 15 years. as far as adhering a base sheet to an iso panel, Im not sure about the spercifics....it needs a nailable base to install a nailable base sheet, unless the ISO has a base sheet already on it, which Im sure someone makes...

hope this helps, and that my info is current....