I am building something akin to a teardrop trailer in my garage. I got delayed and only got the frame prepped by the time it got to be 0 C out in the daytime. I was going to quit till spring but decided to carry on, it has been getting to -15 and at night a forecast for -25 coming up. A few cold days coming and then maybe -5 in the daytime but the forecast is iffy a week away. Got a construction heater going that will make me poor again when I get my electricity bill, I just put that out of my mind for now. At least it is on the cool side of room temperature inside the garage.