AT 2 1/2 years nothing should require attention on the roof unless it sustains damage from an outside source. Dicor, who makes the EPDM (rubber) membrane says only washing the roof 2X a year is all the membrane needs to keep it in good condition for the life of the 10 or 12 year warranty. It is going to get splotches on it from air pollution settling on it, what does not wash off is of no consequence, just looks bad-but only while on the roof, it cannot be seen from ground level. Our last 5er, bought new, was 8 years old when we sold it and the roof was in very good condition. I washed it 2X an year with car-wash soap and a few ounces of bleach in a 5G pail of water.
The Dicor sealant on the roof and membrane never required re-doing during the 8 years because we kept the 5er stored indoors when unused.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"