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06-22-2022, 04:40 PM
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#1
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 2,564
M.O.C. #22835
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What's "really" inside the walls?
I did a modification (I'll start a different thread for that), but it required cutting a hole in the side of my Montana. I thought I get some photos of exactly what is inside those wall and how they are put together. So, here it is! Notice, the walls are 1 7/8 inch thick. This is the main wall, not a wall in the slide out.
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Who you are right now is a sum total off all you use to be.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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06-22-2022, 05:57 PM
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#2
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Montana Master
Join Date: Jan 2018
Location: Austin
Posts: 2,403
M.O.C. #21044
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Unacceptable Dutchman! I was expecting to see some aluminum stud pieces in there somewhere! Just kidding Thanks for posting. Can you do the bedroom door section next?
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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06-22-2022, 06:16 PM
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#3
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 934
M.O.C. #30262
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Now wondering if other manufacturers "short change" the specification for their wall thickness as well. My pessimistic gut says probably so....
Could really use the missing 1/8" of insulation in this current heat wave.
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Lee, Edith, Lil' Bit & Cuddles
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox, Sailun 85s
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
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06-22-2022, 06:40 PM
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#4
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,186
M.O.C. #30417
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Ya that's a nominal measurement And depending on who you ask..... an eighth inch matters!
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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06-22-2022, 08:05 PM
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#5
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Seasoned Camper
Join Date: Mar 2021
Location: San Pedro
Posts: 76
M.O.C. #28338
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Wow, really have me wondering what you are doing…this must have been very scary to do. So now that we all know what’s inside, I have a question. I want to mount some security cameras on outside of RV for when in storage, not sure 3M double sided tape will hold up, so wondering how to best attach mounts with screws. What type of screw would you recommend since not much to bite into, or would something like a drywall insert be better? Thanks
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06-23-2022, 04:40 AM
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#6
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,130
M.O.C. #25165
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Depending upon the weight of the camera you might look at Oscar Rivets. This is what is used to mount awnings and slide toppers. They expand inside the wall and provide a threaded stud to mount to.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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06-23-2022, 08:30 AM
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#7
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 2,564
M.O.C. #22835
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As you can see in the photo, the outside skin (the fiberglass) and the plywood behind it is only about 3/16 inch thick. Behind that is Styrofoam.
When I attached the shower box, I originally wanted to drill holes for bolts to go through the entire wall and put nuts on the inside of the wall. For me, it would have required about a 3 inch, very thin bolt and I needed 10 of them, and I did not want to make another run to the hardware store. I have a lot of odd-and-ends and a mountain of machine screws, wood screws, and dry wall screws. I figure I had something I could use.
I finally decided againt going all the way through the wall and I ended up using self cutting sheet metal screws. With the Butyl putty completely surrounding the box, the stickiness of the putty itself holds pretty good. So, I felt comfortable using the self-cutting screws... especially since there were 10 of them.
I have a rear camera on my camper I installed myself. I removed the original fake cover and it was held on with 2 small screws through that same skin material. When I put the real camera on there, I used a slightly larger screw (diameter) so it would cut a new thread in the skin and a LOT of Butyl putty under it. It's held for 4 years with no problem.
Here's the screws I used, #10 one inch self drilling.
__________________
Who you are right now is a sum total off all you use to be.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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06-23-2022, 08:33 PM
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#8
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Seasoned Camper
Join Date: Mar 2021
Location: San Pedro
Posts: 76
M.O.C. #28338
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Thanks, that sounds like a good plan, although I think I will try some high quality double sided tape first…the cameras are just Ring cameras, weight 1 pound each, and will only be attached to base when parked in storage, they will be removed during travel, just the base attached (so maybe a few ounces at most) that the tape should handle. I hope.
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