I do not know the long term bleach affects. But I do know I had some diluted bleach water splash up on the roof when I was washing the awing. And yes those spots are white again. After a year now of the spots still clean I see no ill effects. I also use 303 UV protectant on the roof as well. Don't know if that helps with what ever the bleach did to it but like I stated, I have not seen any bad things start in those areas.
I'm making the assumption you rinsed well after the suds and bleach bath. While mine is OK from the awning splash, I do not know if I would make a steady diet of bleaching the roof. Maybe a call to roof EPDM manufacture may help clear this up. If you have some 303 I know it will not hurt the situation and may help some.
Good luck and hope this helps.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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