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Old 06-10-2014, 05:49 PM   #1
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Roo Roof Plywood Thickness

It appears by looking at the cut-away image of the Roof roof that there is a top layer of plywood. Does anyone know the thickness of that top layer of plywood on a 2014 21ss?

Thanks,
Steve
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Old 06-10-2014, 05:54 PM   #2
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Are you able to remove the AC cover on the inside?

You can see the thickness there.

I have a 2008 and I want to say it's around 1/4"? Almost like a veneer.

gunrock
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Old 06-11-2014, 09:49 AM   #3
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Looks like 1/4" to me. When I was on the roof to remove the winter cover, I was looking through the bubble on the skylight. You can clearly see the roof construction that way. A lot of styrofoam, not too much wood. And I'm not sure if they use any rafters in the roof. Seems pretty solid, but I was a little surprised when I looked at the cross-section...
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Old 06-11-2014, 11:10 AM   #4
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They use aluminum frame I thought, just like the sides.

Not much to them. :-)

Rubber roof~1/4 underlayment~styrofoam/aluminum frame~interior paneling.

Same for the sides, except instead of rubber, it's a fiberglass exterior.

I just had the roof replaced and a back corner that had delaminated because of the leak, repaired. :-)

gunrock
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Old 06-11-2014, 03:45 PM   #5
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Thanks for your help guys. The reason for asking is that I am mounting two solar panels on the roof and I was deciding what type of fasteners to use. I don't trust wood screws or lag bolts since the plywood is so thin... so I am going with 1/4" hollow wall fasteners that will go through the plywood and flatten out when tightened. They should flatten out fine even embedded in the foam.

I'll keep you posted
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Old 06-11-2014, 03:56 PM   #6
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Optipro,
when we were at the RV dealer a few days ago they showed us a cross section of the floor, walls and roof. Just like was mentioned in another reply there is the rubber roof membrane, approx. 1/4 inch plywood, styrofoam, aluminum frame every so many inches(forgot exactly how many inches apart they said)and the plywood ceiling material. Good luck with your project
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Old 06-11-2014, 03:57 PM   #7
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Quote:
Originally Posted by optipro View Post
Thanks for your help guys. The reason for asking is that I am mounting two solar panels on the roof and I was deciding what type of fasteners to use. I don't trust wood screws or lag bolts since the plywood is so thin... so I am going with 1/4" hollow wall fasteners that will go through the plywood and flatten out when tightened. They should flatten out fine even embedded in the foam.

I'll keep you posted
I've been having the same debate. I fianlly ordered a couple panels this week. I found several youtube videos of installs with screws, but I don't think they would hold.

I found a couple setups using well nuts. I'm thinking that is what I am going to use.

McMaster-Carr

http://www.batterystuff.com/files/11...-1112_hrez.pdf

Pretty cool avatar graphic, btw
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Old 06-11-2014, 04:05 PM   #8
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KMP44... Those rubber rivets fro MC look promising. I'll probably go with the Hollow Wall Anchors like these: http://www.boltdepot.com/Images/Fast...dimensions.gif

KonaIslandKid... are you saying that there is some aluminum framing in the ceiling?

Thanks!!!
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Old 06-11-2014, 04:07 PM   #9
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Also... each solar panel comes with 4 brackets for attaching to the roof. I ordered two more brackets for each panel... for added security and to help distribute the load more.
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Old 06-11-2014, 07:18 PM   #10
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Optipro,
sorry, I didn't mean to mislead you, there is aluminum tube framing for the floor and walls that have the aluminum tubing spaced out. When we were shown the cross section samples for the roof, floor and walls each sample had part of the aluminum tubing in it. The roof does not have aluminum trusses every so many inches.

I called Forrest River and inquired about the Roo's roof construction. The roof has the membrane, 1/4" luan, 4" thick foam (with built in ducting, at least for my model which is the 23ss) and 1/4" luan, it is crowned and the whole roof is vaccum bonded. There is an aluminum truss on each end of the roof and one down the center of where the air conditioning unit is located, the roof has 1x2 aluminum tube framing the perimeter.

I asked about installing a permanently attatched solar panel system to the roof and he said that the safest place to mount the solar panel mounting brackets would be along the edge where the aluminum framing would be and that there would be really nothing of substance to grab onto in other parts of the roof. He also mentioned that it would be best if you didn't have to penetrate the roof membrane.

The first forrest River person I talked to gave me a name and number to call which could provide you with information on things like dimensions for the aluminum framing, which might help you figure out the location of the aluminum tube framing or other parts of the trailer. The Forrest River Customer Service person to contact is Mark Akins, his phone number is 574-642-0368, I was told that he should be able to direct you to the correct department for information that you may need. I have actually talked to Mark before concerning the 2nd year extended warranty, to inquire about what is actually covered. He was very helpful and gave me the name and number I needed to get the information I needed. All of the people who I have contacted at Forrest River so far have been very helpful.

I hope this helps you, Good Luck with your project.
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