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06-09-2020, 05:50 PM
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#1
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Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 665
M.O.C. #26399
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How thick is the roof
I have a 2018 3811MS. I am planning on putting on solar panels and another person said the roof might only be 1/4" to 5/16" thick. I don't think you can walk on 1/4". I thought the roof was 3/8" when it is walkable but can't find proof. Does anyone know for sure?
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2018 Keystone Montana 3811MS
2017 Ford F450 diesel dually
600AH Battle Born Lithium Batteries, 1,080 watts solar
3,000 watt hybrid inverter with 120A charger
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06-09-2020, 06:26 PM
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#2
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Montana Master
Join Date: Jan 2018
Location: Austin
Posts: 2,413
M.O.C. #21044
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There are several “keystone factory tour” or “montana factory tour” videos on YouTube that will help you understand the roof construction. Try googling for the videos. Sorry but I don’t know how to link to videos on this iPad. The roof is walkable and it is probably the 5/16” OSB decking. Someone here will have info on mounting solar.
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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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06-09-2020, 06:45 PM
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#3
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Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 665
M.O.C. #26399
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Quote:
Originally Posted by Mikendebbie
There are several “keystone factory tour” or “montana factory tour” videos on YouTube that will help you understand the roof construction. Try googling for the videos. Sorry but I don’t know how to link to videos on this iPad. The roof is walkable and it is probably the 5/16” OSB decking. Someone here will have info on mounting solar.
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I did check out one video, but it is 10 years old. I doubt 5/16 is walkable. I have spent a lot of time talking to a US based solar provider and he uses VHB tape plus 3/4" SS sheet metal screws. They have never lost a panel.
Thanks for your input.
__________________
2018 Keystone Montana 3811MS
2017 Ford F450 diesel dually
600AH Battle Born Lithium Batteries, 1,080 watts solar
3,000 watt hybrid inverter with 120A charger
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06-09-2020, 07:08 PM
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#4
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Montana Master
Join Date: Jan 2018
Location: Austin
Posts: 2,413
M.O.C. #21044
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Whatever the actual thickness is - I have walked on mine numerous times with confidence. Watch this video by forum member “home with the hoopers” and start a new thread titled “need info for solar mounts” and you will get good info.
https://youtu.be/o0W2PeLlUBY
__________________
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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06-09-2020, 07:21 PM
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#5
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Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 665
M.O.C. #26399
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Quote:
Originally Posted by Mikendebbie
Whatever the actual thickness is - I have walked on mine numerous times with confidence. Watch this video by forum member “home with the hoopers” and start a new thread titled “need info for solar mounts” and you will get good info.
https://youtu.be/o0W2PeLlUBY |
I have walked on mine a lot too, and I weigh 200lbs. The video isn't too informative re roof thickness, but if I was going to guess I would say 3/8".
__________________
2018 Keystone Montana 3811MS
2017 Ford F450 diesel dually
600AH Battle Born Lithium Batteries, 1,080 watts solar
3,000 watt hybrid inverter with 120A charger
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06-09-2020, 07:25 PM
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#6
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Montana Master
Join Date: Oct 2015
Location: westminster md
Posts: 2,318
M.O.C. #17894
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I am reasonably certain its 1/2" osb
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2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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06-09-2020, 07:31 PM
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#7
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Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 665
M.O.C. #26399
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Quote:
Originally Posted by beeje
I am reasonably certain its 1/2" osb
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I just watched a video of the 2020 production line and 1/2" certainly would not be out of line with what I could see. It certainly was not 1/2 or 5/16, the board was far too stiff for that, either 3/8 or 1/2 makes more sense.
__________________
2018 Keystone Montana 3811MS
2017 Ford F450 diesel dually
600AH Battle Born Lithium Batteries, 1,080 watts solar
3,000 watt hybrid inverter with 120A charger
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06-10-2020, 04:51 AM
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#8
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Montana Master
Join Date: Sep 2014
Location: Full Timer In Naples, Florida
Posts: 1,049
M.O.C. #15731
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Our unit is 3/8" plywood not OSB. I had to replace a tank vent and found that one out.
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2017, 3500 Ram Big Horn, 4x4, Crew Cab, DRW, Aisin Transmission, 4:10. Curt Q20, 2014 Mountaineer 331 RLT, Sailun's on the rv and truck.
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