You guys have me concerned, as far as the insulation plastic liner and wiring may cause a fire. Looks like I will postpone the insulation part and just use a fan inside the trailer when it is parked along side my house. I'll put a timer on it so it will operate during the daylight. The trailer came with vents and if I circulate the air inside the trailer it may not be necessary to insulate. Next summer I will monitor the inside temperature of the trailer and then make a decision as whether to insulate or not.