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Thread: Roof with Mold line every 4 foot
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01-29-2019, 07:01 PM #71
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Okkie doke, thnx. To me it seems pretty hard as for a one person job. I feel like I should be rinsing the side walls down constantly for run off or something meanwhile do this or that. LOL I know i'm overthinking things. Cant wait for Spring dangit to get a lot of this stuff done. Thnx MWC
2017 Ram 3500 DRW 6.7l 4x4 regular cab 3.73 gears 68rfe trans. Payload 6255lbs
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01-29-2019, 07:08 PM #72
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01-29-2019, 07:18 PM #73
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03-27-2019, 03:16 PM #74
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2016 Reflection 27RL
2015 Silverado 2500HD 6L
B&W Patriot 18k slider
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04-22-2019, 10:26 AM #75
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Update: 30 Second Cleaner works! I finally got around to cleaning the black stuff from the roof. 30 Second Cleaner literally turns the black to yellow as soon as you spray it on and I was able to scrub it clean with a long handle sponge mop with a stiff plastic brush on the opposite side of the foam pad. Rinse and do another place. I was able to do the entire roof plus the slide roofs in about 45 minutes. I rinsed the run off from the walls and windows. Coach is getting washed and waxed later this week.
Last edited by KirbyRVA; 04-22-2019 at 10:29 AM.
2019 Solitude 384GKR
Stored, used at Myrtle Beach, SC
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04-24-2019, 07:04 AM #76
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Very interesting. I’ve been following this thread with interest cuz I have the same issue on my 384 GKR. So, no damage to the finish from the run off on the walls?
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04-24-2019, 08:17 AM #77
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2019 Solitude 384GKR
Stored, used at Myrtle Beach, SC
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12-13-2019, 06:38 PM #78
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I know this is an older thread, but ran across it and think I may have some info that may be helpful.
I have been a Catastrophe Adjuster for Insurance companies for almost 18yrs now. Every year I deal with water, mold and weather related claims and am very familiar with all types of roofing products.
Based on the build of the Grand Designs, with wood framed roofing - this sounds, and looks very much like a problem we occasionally run in to called GHOSTING. Ghosting typically happens indoors and is related to the movement of air particles in a not well ventilated place, and the electrostatic charge of the particles in the air.
What is Ghosting?
When air moves— especially through interior ventilation systems— it picks up an electrical charge. The positive and negative charges force the tiny air particles to clump together.
Condensation in the walls or ceilings attracts these particles to cold spots on studs and rafters in wood framing. Light-gauge steel studs and steel drywall fasteners have a high level of electrostatic conductivity, so they too attract air particulates.
Over time, these microscopic bits of dirt and soot gather, making visible stains on walls and ceilings.
It appears as if the algae mentioned, is attracted to the studs or joints on the roof surface as the temperature of this area is slightly less than that of the overall roof surface. And yes, since it is algae, it does not have to be in a cold, damp environment to grow. The slight difference in temperature causes an electrical charge that attracts the algae, and the build-up.
Furthermore, the process will continue to happen over and over again, if the conditions continue or exist in the future, regardless if the algae present now is cleaned and removed.
TPO Roofing - most all comments on TPO roofing have been correct as posted so far. It can be cleaned with bleach. It can be cleaned with a brush. It is nonporous.
But, as was also mentioned - I would not use and alcohol or acidic cleaner on the TPO, and would only use a brush that lightly scuffs the surface.
In closing - the algae can be removed without harming the roof - however, if left alone for a length of time, the algae can stain the TPO surface which will not be removeable.
Hope this helps. Oh, forgot to mention that I have the black marks on my roof too, and have cleaned them off every year since I bought the trailer.
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12-13-2019, 07:44 PM #79
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12-17-2019, 02:51 PM #80
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