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Old 09-28-2016, 11:09 AM   #1
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TPO roof problem..

Well, the fact is my 12 year-old Jayco roof is fine. But I'm not the first owner and I think someone coated the roof earlier. Now the coating is spotting and peeling. I want to get this stuff off. But I don't know how.
BTW, I'd rather not power wash it; I've got solar panels and eternatape on the roof Now and I'm worried about messing that up.
Any suggestions?
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Old 09-29-2016, 05:44 AM   #2
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Take a good stiff push broom and brush to it. Not all will come off easily until more time has elapsed. Good luck and keep us posted.
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Old 09-29-2016, 09:58 AM   #3
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It's a shame if somebody coated a TPO roof, especially long before it has shown any sign of surface wear. Sheer ignorance, IMO, though it may well have been touted by some RV shop anxious to make some big bucks. How to convince people that its the seams and joints that leak, not the membrane?

In any case, brush or scrape with something stiff, as Mike suggests. Or get that pressure washer out (hopefully one more like 1500 psi than 3000+). If your tape & caulk is sound, it won't come off unless you get really close with that washer nozzle. Of course, it is applied over the coating, it's gonna come off with it no matter how you remove it.
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Old 09-29-2016, 11:32 AM   #4
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No kidding...shame. Just found out the previous owner laid Liquid Rubber for EPDM roofs on the TPO a little under 3 years ago. That would have been in the winter of '14.
What an expensive mess!
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Old 09-29-2016, 05:11 PM   #5
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I would not scrape or power wash or anything else, otherwise you may damage the TPO underneath. How about letting it just wear off with time?
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Old 09-30-2016, 11:52 AM   #6
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Interesting. Unfortunately, I've already got half of it off. It's coming off in big pieces...never really bonded well. It's been suggested that I leave it under my solar panels, rather than remove them for that. But I'm worried that, because the coating is so loose, a moisture layer would cause problems.
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Old 09-30-2016, 03:09 PM   #7
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The concern with pressure washing its that a nozzle with the fine needle spray at something like 3000 psi will easily cut the TPO (or your skin!) if held to close. A broader spray tip at 1200-1500 psi should be no worry as long as you don't poke it tight into the membrane.
The reason for the general rule against pressure cleaning EPDM and TPO (and many other things) is simply that neither your skill nor your equipment is known to others, so the only safe advice is "don't do it".
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Old 09-30-2016, 11:03 PM   #8
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Good advice! This stuff is coming off so easy that I don't think I'll need the pressure wash.
I will have to remove and replace all the sealants that I've placed on top of the liquid rubber since buying the RV. They're only attached to the coating, so it shouldn't be that difficult.
Lesson learned and another question to ask sellers: Is there any coating on the roof? ��
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