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Old 05-28-2019, 10:03 AM   #1
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Brownish stain on roof from AC

The pictures show the roof of a 2015 Georgetown 335. Has anyone encountered this before? If so, what was the cause and fix to stop this from reoccurring, and how to get rid of the stain.

Thank you FR friends

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Old 05-28-2019, 10:17 AM   #2
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that's from condensate run off . not much you can do but clean it up every so often
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Old 05-29-2019, 10:00 PM   #3
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I have found the Protectall Rubber Roof Cleaner takes off those stains easily. Just wipe with a sponge, no rinsing. I'm assuming it's a rubber roof....
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Old 05-30-2019, 07:09 AM   #4
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I have found the Protectall Rubber Roof Cleaner takes off those stains easily. Just wipe with a sponge, no rinsing. I'm assuming it's a rubber roof....


Thanks Wildcat, but the roof is a one-piece fibreglass.

Cheers!
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Old 05-30-2019, 07:14 AM   #5
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Very typical stain for rubber or fiberglass roof from the A/C unit runoff. I scrub my rubber roof twice a year to keep it at a minimum.
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Old 05-30-2019, 07:20 AM   #6
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I have to ask... is that an A/C cover in the photos?
Looks like a roof vent cover? Maybe it's just the photo.
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Old 05-30-2019, 07:29 AM   #7
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I have to ask... is that an A/C cover in the photos?
Looks like a roof vent cover? Maybe it's just the photo.


Hi Spicker, itís an A/C cover.
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Old 05-30-2019, 07:52 AM   #8
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I might suggest to clean and wax very well.

They make additives to put in the evaporator drain pan in commercial and residential A/C applications. These stop bacteria/mold/slime in the drain pan. This would prolly help. Only issue I see is what is in them. They are prolly not harmful as you breathe the air from around the evaporator. I just wonder about the roof material. I will try and check it out.
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Old 05-30-2019, 09:16 AM   #9
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page 41 here...
https://www.graco.com/content/dam/gr...pGuideEN-B.pdf

https://www.rectorseal.com/web-media/hydrex_data.pdf

https://www.sciencedirect.com/topics...nium-compounds
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Old 05-30-2019, 11:18 AM   #10
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Thanks Wildcat, but the roof is a one-piece fibreglass.

Cheers!
Ah! I learn something every other day.
Out of curiosity, I searched for fiberglass RV roof maint. WOW! All kinds of cleaning products, sealers, coatings just for fiberglass roofs, along with DIY videos. Sounds like it is basically fiberglass with a gel coat, so lots of products and options.
I did try to find a non-rinse product, so it wouldn't leave streaks down the side of the RV by removing the wax, but didn't find one. Yet.
I figure I had better learn this as my Dad just bought a MH, and I'm betting his could have the same type of roof. Lucky me
Looks like you won't have any problem finding a solution to cleaning that stain that we all have to deal with.
Happy camping!!!
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