Mildew on rubber roof
I purchased a used 5th wheel in 2010. It has some milder spots on the rubber roof. I have thoroughly cleaned and scrubbed the roof every year with rubber roof cleaner but the spots get worse every y...
Forum Discussion
Itching2go wrote:rjsurfer wrote:Fresno Tundra Driver wrote:
Are you sure its mildew? The white is only the cover for the black rubber material underneath. As the white material wears off and exposes the black rubber it can look like mildew. If it looks worse after cleaning it may be that you are stripping off the white material.
+1
Ron
+2
There have been lots of threads on the subject of scrubbing down rubber RV roofs over the past couple of years, but the only possible benefit I've heard yet is that it might help to avoid black streaking from rain flowing down the side of the rig. Heck, I've had a rubber roof on our family room for 20+ years, and never considered washing it. Why would I do it on my fiver? Again, there may be good reasons, but I haven't heard one yet that makes sense to me.
+3
I think you are washing away the white outer coating with all that scrubbing. If it was mildew, the bleach would take it off fast. If the bleach doesn't remove it, then I think you are seeing the natural black color of the rubber roof. If the black DOES come off, and then comes back in a few months, then I am wrong about this and I would start leaving the cover off during storage. Mildew can't survive in sunlight.
I'm in the no-roof-washing camp. I think you are just washing away good roof material every time you wash it.
