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Old 01-08-2019, 03:34 PM   #1
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Which Roof Material

Hi All,

We have a new to us 2006 Beaver Patriot Thunder and I have determined that I need to reseal the roof vents, antenna entry points, etc. I am having some difficulty determining the roof material, however. The owner’s manual describes it as fiberglass, but it certainly doesn’t look like fiberglass to me. It appears to be a single sheet of material, white in color and has give when walked in. I can feel the ceiling braces under my feet.

That having been ssid, it doesn’t feel like rubber which I believe would indicate EPDM or TPO.

I am keen to use the correct sealants and coatings, but need to know which type of roof I have. Any insights would be greatly appreciated.

Rick
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Old 01-08-2019, 06:10 PM   #2
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It is a one piece fiberglass roof cap. You may be seeing a roof coating that was applied by a previous owner. The give in the roof would worry me a little. Mine is solid as a rock. I weigh 205.
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Old 01-08-2019, 06:29 PM   #3
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Quote:
Originally Posted by gemert View Post
It is a one piece fiberglass roof cap. You may be seeing a roof coating that was applied by a previous owner. The give in the roof would worry me a little. Mine is solid as a rock. I weigh 205.
And yet mine has give. I have had it checked 3 times and was told all 3 times it happens on some Monaco coaches.
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Old 01-09-2019, 01:51 AM   #4
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That was what perplexed me. I figured it should be absolutely solid with no give. It definitely has flex to it.

Rick
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Old 01-09-2019, 01:54 AM   #5
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And yet mine has give. I have had it checked 3 times and was told all 3 times it happens on some Monaco coaches.
Sounds like my roof exactly. We had a 1996 Winnebago adventurer that was also purported to have a fiberglass roof and it felt exactly like this, as well.

Rick
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Old 01-09-2019, 02:29 AM   #6
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Ok, I think I have found the answer. Monaco does not glue the fiberglass to the plywood underneath. There is plywood covered by a vapor barrier that comprises the solid portion of the roof. The fiberglass sheet is put over this but is not glued down. Apparently, some manufacturers either glue the sheet down or use a thicker, solid piece of fiberglass (perhaps like a boat hull). The Beaver has a flexible fiberglass sheet instead.

Rick
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Old 01-12-2019, 04:05 PM   #7
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The fiberglass roof on my 08 Endeavor has some flex when I walk on it.... Should be nothing to worry about.
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Old 01-12-2019, 04:10 PM   #8
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Hi Rick! That sounds like a fiberglass roof. I would use the 4" EternaBond tape for the larger openings such as skylights, vent fans, etc, and Dicor 502LSW self-leveling sealant for the smaller openings such as vent pipes, TV antenna, etc.
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