by Gonefishin » Fri Sep 21, 2012 8:42 am
My trailer came with factory-installed insulation that is in thin sheet form, but I'm not sure how different it is than a non-insulated model since its all I've ever had. It has to help though, so if you're building, spare no expense. Its definitely warmer inside than outside when I wake up in the morning. Usually a 10-15 degree difference.
I'm not sure how cold you're talking, but I've camped in mine with overnight temps around 20. I don't have a permanent or vented heater. That would be the best and safest way though. Instead, I use a portable Coleman propane heater and a 12-volt electric blanket that goes over the mattress (I sleep on top of the rising heat!) I do not leave the propane heater running when I'm sleeping or could fall asleep! It says you can, but I'm not doing it. I also always crack both windows, and open a roof vent slightly. I also have a carbon monoxide detector/alarm inside velcro'd to the wall right by my head! Its never gone off, despite running that heater for hours on end, so I think I'm pretty safe, with precautions.
The drill is to warm up the trailer in the evening before I crawl into bed, and shut off the heater before bed, leaving it within reach of the bed. I plug in the 12-volt electric blanket when I go to sleep. That blanket, and a couple of large comforters on top, keeps the bed pretty darn nice! In the morning, I can reach down and light the propane heater again to warm things up a little before I get out of bed. By then, I'm awake, and if I did doze back off, it wouldn't be for very long, so I say in bed until it warms up a little, usually about 15 minutes. Then I can get up, get the hot C going, and I'm good to go.
One other issue that can come up is "natures call" in the middle of the night. For that, I have both a portable "groover" I can use, or the venerable "pee bottle." Going outside at 2 in the morning in below freezing ruins a good night's sleep. If you usually need to get up, drink less before bed.