Older motor homes, or RVs, generally have metal roofs that require a regular cleaning twice a year. Black streaks running down the sides of the RV can be prevented with the regular roof cleaning as well. A mild soap and water are all that is necessary, though automotive wash and wax can also be used. RVs that are parked beneath sap-dripping trees, fruit trees or trees with a lot of birds require more frequent cleaning to prevent permanent stains.
RVs made with rubber roofing membrane can last up to 20 years longer than RVs built with metal roofs. No roof treatment is necessary apart from regular cleaning approximately four times a year. This cleaning will reduce the chalky build-up often found on rubber roofs as well as reduce the white streaks that sometimes appear on the sides of the RV. A mild laundry detergent should be used to wash the roof, or another petroleum-free, abrasive-free, citrus-free cleaner.
All metal roofs require two coats of UV protectant, such as Protect All, to be applied annually. Although not mandatory, rubber roofing can be treated with an aerospace protectant to help resist stains and make cleaning easier. The treatment should be allowed to dry between coat applications.
The best time to inspect the roof for leaks, tears or other damage is after a thorough roof-cleaning. The places that need special attentions are the roof seams, around the vents and around any other items that have been added to the roof like the air conditioner covers and the TV/satellite antenna. Caulking or sealant must be replaced or repaired before further damage develops.
