When I had our 30’ Springdale TT with one big slide I used 1” Polyiso board and had it fully around the trailer and slide. Used a 1500 watt ceramic heater under it back by the tanks and never had any issues. I would do this when working in the Carolinas, Virginia etc.
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2018 Ram 3500 MegaCab 4x4 Aisin, 4:10 Gears
Titan 50 Gal Tank, Air Lift Wireless Bags
2017 3160 RL
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