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10-08-2021, 12:17 PM
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#1
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New Member
Join Date: Oct 2021
Location: Amarillo
Posts: 2
M.O.C. #29825
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insulation around tanks
I have 4 season Montana 3121 and I looked behind basement wall in tank area and there is no insulation From what I understand it not only supposed to have tank heaters but also is insulated with batting or rolled insulation. Dealer service guy says he doesn't know I did have a water leak and dealer pulled underbelly to repair I'm thinking they took out insulation because it got wet and didn't replace it. what do you guys think? Thanks for any replys.
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10-08-2021, 01:00 PM
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#2
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 1,979
M.O.C. #22835
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I could be wrong, but I've never seen any tanks insulated. They are placed in the underbelly of the trailer and the furnace blows warm on on them (supposedly), and with the tank heaters under them, that's all there is.
__________________
To plant a garden is to believe in tomorrow.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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10-08-2021, 01:06 PM
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#3
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 1,994
M.O.C. #21963
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Same ^^
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2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
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10-08-2021, 01:11 PM
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#4
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Montana Fan
Join Date: Oct 2015
Location: Chiefland
Posts: 117
M.O.C. #17939
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Mine has a layer of bubble type and a thin layer of fiberglass insulation under the tanks.
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Art and Linda
2007 F250,2000 Montana 2850 RK
2017 F350,2016 Montana 3721 RL
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10-08-2021, 05:35 PM
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#5
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,139
M.O.C. #24086
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Keystone Montana factory tour.
They use Reflectex (silver coated bubble wrap) for insulation. I think it has an R factor of 3?
The Coroplast also provides some protection.
Tanks at 3:55 and 9 minutes
Bottom insulation 7:20 and 8:35 and 12:38 minutes.
Water line routing/insulation 12:38 minutes.
Racetrack AC ducts 32:42min.
https://youtu.be/cV0OZv0bCgc
Home with the Hoppers factory tour
https://youtu.be/o0W2PeLlUBY
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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10-08-2021, 06:59 PM
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#6
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,764
M.O.C. #11455
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__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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10-09-2021, 06:51 AM
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#7
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Established Member
Join Date: Aug 2021
Location: Franktown
Posts: 25
M.O.C. #29489
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[QUOTE=Daryles;1235523]Keystone Montana factory tour.
They use Reflectex (silver coated bubble wrap) for insulation. I think it has an R factor of 3?
The Coroplast also provides some protection.
it’s called Astrofoil so it probably pushing an R factor of 3.1 
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Daryl and Debbie
Colorado
2021 3855BR Legacy
2019 F350 SRW
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10-11-2021, 02:26 PM
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#8
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New Member
Join Date: Oct 2021
Location: Amarillo
Posts: 2
M.O.C. #29825
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wow even my heartland had fiberglass and bubble in underbelly. so much for 4 season package huh
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10-11-2021, 06:58 PM
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#9
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,284
M.O.C. #12947
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Our rig has the bubble wrap above the coroplast and no tank heaters. We have been at temperatures below 10 degrees and used the furnace to heat the rig and never had an issue with any of the tanks freezing. I’m thinking not much else is really needed. Personally, I think the tank heaters may be a nice new addition but not necessary in the long term. With the heated under belly area, I also don’t see any need for any insulation wrapped around the tanks.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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10-12-2021, 05:34 AM
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#10
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Montana Master
Join Date: Jul 2014
Location: Upstate NY
Posts: 1,778
M.O.C. #14547
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Just some Reflectix was originally below our HCs tanks along with only a hot air duct (mouse track to the rest of the trailer!) keeping them warm
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Dave W
2014 Montana High Country 343RL (Sold!)
2011 Ford 6.7 2011 F250 Lariat CCLB
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11-26-2021, 09:10 AM
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#11
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Montana Master
Join Date: Mar 2015
Location: Gardnerville
Posts: 1,219
M.O.C. #17163
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Same here. Except we have blanket heaters glued to the tanks bottoms.
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