Roof with Mold line every 4 foot

**grumpypapa** · 11-07-2018, 01:43 PM

Originally Posted by howson

Brian,
Check out post #7 in this thread.

-Howard

thanks Howard.

**gbkims** · 11-08-2018, 07:35 PM

On the roof today. My roof needs a washing and fellows next to me too.

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**Captain America** · 11-08-2018, 08:37 PM

Seems to be a common problem.

**grumpypapa** · 11-11-2018, 11:03 AM

The roof on our 303rls looks the same,maybe even worse.Unreal,when I contacted granddesign ,they mentioned it had happened on a very few units,mmm !!!

**Callahan4** · 11-20-2018, 06:55 PM

Mine was like this as well I tried a couple thing an did not work but I want to Lowe’s an got a gallon of the 30 second cleaner for $9 and made a 50/50 mixture an sprayed the lines an a couple spots an waited 5 or so mins an sprayed off with garden hose and almost all was gone did 2nd treatment and a good rinse an all was gone. Then I went ahead an wash the sides down just Incase. I did take a before pic was was dark after getting done so no after pic. Also a pic of the cleaner.

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**grumpypapa** · 11-21-2018, 10:34 AM

Thanks for posting the 30 second cleaner,clean up.Will be doing that treatment for sure in the spring.

**wannabervin** · 01-21-2019, 08:19 PM

Originally Posted by Callahan4

Mine was like this as well I tried a couple thing an did not work but I want to Lowe’s an got a gallon of the 30 second cleaner for $9 and made a 50/50 mixture an sprayed the lines an a couple spots an waited 5 or so mins an sprayed off with garden hose and almost all was gone did 2nd treatment and a good rinse an all was gone. Then I went ahead an wash the sides down just Incase. I did take a before pic was was dark after getting done so no after pic. Also a pic of the cleaner.

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Your pic looks a lot like my roof. Did your procedure cause any problems with the finish on your exterior walls?

**JCZhome** · 01-21-2019, 08:32 PM

What is the active ingredient? Is it chlorine?

**wannabervin** · 01-21-2019, 08:56 PM

Originally Posted by Cate&Rob

Hi Jim,

I have never used the 30 Second cleaner on the RV. On the boat, I mix it with water in a pail and use a soft bristle scrub brush to remove the algae. Then, I flush the area really well with clean water. If you let it dry on the roof, I expect the first rain will wash it away.

Rob

Jim,glad to hear the Alpha method worked well,since I have the same issue. Did you have any problems with damage to the finish and/or decals on your camper's walls?

**MidwestCamper** · 01-22-2019, 04:43 AM

Originally Posted by wannabervin

Jim,glad to hear the Alpha method worked well,since I have the same issue. Did you have any problems with damage to the finish and/or decals on your camper's walls?

The Alpha method left no damage to the roof. When I brushed on the no drip (gel) bleach, there was no dripping down the sides since the gutters caught any run off which was minimal. Afterwards, I rinsed the entire rig off including the sides.