MM,
My slides have a white roof, as does the coach itself.
I occasionally will venture onto my coach roof, and do so for a variety of reasons. There are times when we are parked in an area with excessive dust, pollen, or other material falling on our roof. I get up there to clean it off, otherwise after a rain I have streaks running down the sides of the coach. I have been up there to service the satellite dish or check on it. I have had a failed coax connector on the dish that had to be replaced and I had a tree limb strike the dish and I needed to verify it did no damage.
I don’t like to be in the roof, more because of the damage I might be causing. Our roofs were not designed for walking, so if I get up there I try to place my feet on the roof supports.
I do access the roof of the slides, almost always to make sure nothing is stuck in the seal and to wax them occasionally. I have a ladder I carry on the bus that I can use to get on the roof if needed, but I have not used it for many years for that purpose. When I get on the roof I almost always do it in my garage from either my 10 foot step ladder or my 15 foot step ladder. The reason for having the potential to get on the roof when traveling is in case the over-air TV antenna will not retract or if I have to manually retract the awnings or service a vent fan cover.