Roof Maintenance

Kostyan wrote:

Gjac wrote:
If you have a EPDM roof and the black spots don't come off when you clean the roof the spots are probably the black EPDM under layer beginning to show and not mold. The white top layer will slough off over the years and multiple roof washings and eventually just leave the black under layer exposed. My friend has the same year MH as mine and his roof is entirely black. Another friend gave me some Cool Seal roof coating 10 years ago which he no longer needed when he bought a new MH with a FG roof. I had enough to apply a primer coat and one top coat. It lasted for about 5 years and is almost all worn off. The bottom line is the coating sloughed off instead of the roof material itself extending the life of the roof.

if this is a mold damage, will it spread to the rest of the trailer and make it dangerous to stay in?

What you are saying is painting over the mold to cover it up, it does not take care of the problem itself

What I am saying is if the black spots don't come off when scrubbed it is likely not mold at all, just the top layer of white wearing off. EPDM has a thin layer of white material on top and a black layer underneath when the white layers sloughs off it does not do it evenly and the spots show up as dark grey at first then splotchy ares of black. When you scrub these spots and they get darker then the OP has what I described, if they go away when scrubbed they are mold or imbedded dirt. I have seen older MH's with EPDM roofs where the roof is more back than white, and as I said in my first post my friends roof the same age as mine is entirely black. The coating has almost worn of my roof and I can see those same black spots that at first glance looks like mold.