For those "gluttons for punishment" or folks otherwise staying in cold environments, I have made a youtube.com video on how I went about using foam-board, visquene (plastic sheeting) and non-residue duct tape to insulate our Redwood for the Montana winter. Securing slide-toppers for the weight of snow is also covered.
Video link -
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Ian & Cara (Copper the canine)
Vancouver, WA
2014 36FL, DW, W/D, CVac, Full Body Paint
2011 Ram 3500 Laramie Longhorn 6.7L TD, SRW, 4X4.