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Author Topic: Black Streaks  (Read 362 times)

Free Spirit

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Black Streaks
« on: October 18, 2017, 05:56:45 PM »
What causes black streaks across the roof and accompanying wide spread small spots.

Thanks in advance
Retired and full time living aboard our Denali 293RKS.
Don't know much about RV"s in general and are still learning. First lesson learned is that dealerships are not responsible for anything and warranties can be used for toilet paper.

Gary RV_Wizard

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Re: Black Streaks
« Reply #1 on: October 19, 2017, 09:47:36 AM »
Black mold. EPDM rubber roofing has deep pores that fill with chalky dirt and both green and black molds thrives in it.  Wash the roof with a detergent and strong bleach solution, using a medium bristle brush to work the dirt out of the pores. Be careful to rinse well and thoroughly, because the chalky/dirty/moldy gunk that runs down the sides while washing can be difficult to remove if allowed to dry on the sidewalls.
Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL


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Re: Black Streaks
« Reply #2 on: October 20, 2017, 10:51:10 AM »
The best thing I've found for removing black streaks is Awesome Orange from the Dollar Store.  Black streak Remover works half as well and will burn your skin so you have to wear gloves.  I've used it on my TPO roof too.
Retired computer professional
Musician, songwriter,  mediocre guitar player.
2006 Bounder 34H, 2008 CR-V Toad


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Re: Black Streaks
« Reply #3 on: October 20, 2017, 11:06:15 AM »
The best thing I have used to remove black streaks is 97% rubbing alcohol on a cotton cloth. Quick, easy, and no rubbing. Just wipe it on, wipe it off. Hasn't hurt the siding of finish on either one of my RV's.
I know you believe you understand what you think I said,
But I am not sure you realize what you heard is not what I meant

2012 Redwood 36RL
2016 Leprechaun 319DS