What type of roof do I have? - Dutchmen Owners

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Old 04-10-2018, 01:55 PM   #1
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What type of roof do I have?

Okay, so I want to go through and reseal a few areas on my roof. In my reading it looks like there are a couple of different roofing materials and they they require a different type of sealant. How do I know what kind of roof I have. I climbed up and looked at it. It appears to be a rigid plastic/fiberglass sheet. What would that be considered?

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Old 04-10-2018, 03:09 PM   #2
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I can't really help you on the type of roof, but I will add my recent experience. I thought mine was a solid plastic type roof also. But then on one of the edges, I noticed that it is a rubber type material laid over some very thin plywood. There was a small section on the edge of the roof where the two were not bonded together that let me realize that it was a covering and a base as opposed to one solid, thicker piece of plastic.
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Old 04-10-2018, 05:47 PM   #3
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Take some 409 and clean a spot on the roof near the where the edge ties in and take a picture. TPO is quite often textured. Also if you pull an interior vent trim you should be able to see what the roof construction is, typically (but not always) when it is a membrane roof they leave a bit hanging down, a solid roof like FRP you would be able to see the edge of the top layer(s) right up against the vent.

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Old 04-10-2018, 10:12 PM   #4
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A neglected one?
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Old 04-10-2018, 10:48 PM   #5
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A neglected one?


Yeah, well it is 24 yrs old.


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Old 04-11-2018, 04:30 AM   #6
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Old 04-11-2018, 12:07 PM   #7
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What is the recommenced cleaning method and product to use? Do people people pressure wash them, or do they do the scrub and rinse method?

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Old 04-11-2018, 12:31 PM   #8
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What is the recommenced cleaning method and product to use? Do people people pressure wash them, or do they do the scrub and rinse method?

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I would NOT pressure wash it. Automotive soap and water should be fine and a soft brush. you may also want to use the ones with the wax in it.. in my opinion! Walmart sells a great brush with a hose connection, very soft.

https://www.walmart.com/ip/Detailer-...andle/15111242

Although, this guy uses a pressure washer. You can see it lifting up some of the seals and moving them around. He says he has a rubber roof!

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Old 04-11-2018, 01:31 PM   #9
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Now I know "Tito" has no credibility on how to care for an RV. It would be a fools errand to force pressurized water into a soft rubber roof and especially around any caulking. You could slice that rubber and never know it... until the next rain.

I use simple green and a soft/medium bristle brush.
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Old 04-11-2018, 02:39 PM   #10
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Scrub and rinse, use a relatively mild detergent. I do use a pressure washer on it's lowest setting on some stubborn ones. I use dilute Simple Green on the really ugly stuff. Otherwise car wash or dish detergent. Lots of water to keep the streaking down on the sides of the trailer.

I am betting you have fully adhered TPO which would feel like a hard plastic or fiberglass roof.

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