Not familiar with your model, but you need to find out it is a Flex Alpha System, or a EDPM rubber roof. The Alpha Systems just need to be clean with Spic & Span when ever they are dirty (no UV Protectors needed). My Windjammer has the Aplha System and is a 4" walk-able roof, love the low maintenance.
The EDMP rubber roofs IMO are high maintenance, requiring a special rubber roof cleaners and UV protectors applied several times a year. Seem like they get chalky no matter how much cleaning and UV protecting you do to them, just my opinion and experience.
My 2010 Keystone Passport had the EDPM rubber roof. For it I had (2) pieces of 2' x 4' 3/8" plywood that I glued carpet to them (wrapping the carpet around the edges to protect the roof). I alway used these carpeted plywood pieces when up on the roof they really add reinforcement and piece of mind. they store nicely in the pass-through.
2015 Rockwood Windjammer 3029W Diamond Package
2014 RAM 2500 Laramie Longhorn 4 x 4
6.4 Hemi 410 HP, 410 Rear Axle