I have had two different Rv repair persons inspect my roof and both say that the black rubber membrane is starting to show through. I am the second owner so no warranty extends. It is a Dicor roof. Has anyone on the forum had this experience so far. My unit is only 2 yrs and 9mths old, Dicor offers a 12 year warranty but only to the original owner. I would appreciate any input on this subject. Oh and yes the roof has only had a diluted dawn dish detergent or camco rubber roof cleaner. Thats it...G