Rachel, FR makes around 100 different brands, some sharing the same model number. So you should post the brand name, not Forest River.
If you fill out your profile, it has a place for your RV info.
That way you don't have to keep posting it.
I'm assuming that you have a Cherokee TT, which does NOT have a fiberglass roof.
It has a RUBBER roof. You should have gotten paperwork from from the roof membrane manufacturer, in your owners manual packet.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity