BriteTEK is also known as a Membrane Roof, Combining the benefits of EPDM and TPO (thermoplastic olefin), BriteTEK Roof Membrane provides a watertight roof with superior puncture and tear resistance. Vastly superior to the older membrane roofing materials.
And fiberglass is NOT maintenance free either, tree branches can crack it, sun/UV can damage it, expansion and contraction can also crack the fiberglass roof, and the usual intrusion points such as vent pipes, skylites, antenna intrusions, clearance lights, edges etc still need caulking. Plus the 2 or 3000.00 upcharge for fiberglass needs to be thought out too.
From "fiberglass RV's .com"...