Originally Posted by supercoolsy
I live in Belgium and it is very cold in winter and mostly it snows every year. When I want to live in a bus... Is extra isolation necessary?
Effective insulation performs a number of functions, just as it does in a home.
It slows down, or prevents heat transfer. That means that it keeps cold things cold, and vice-versa.
Additionally, it helps keep condensation to a minimum which has a significant effect on how comfortable a space is to spend time in, as well as reducing the incidence of problems like rot and mold, symptomatic in damp spaces.
A bus is a horrible environment to make a home in. It's a tin can and, without insulation suffers all of the worst effects of heat, cold and damp. It was insulated from the factory, but the brief was merely to keep it bearable for passengers for a few minutes (usually) every day.
You need to improve on that if you want to live in it, and your heating and cooling bills will thank you.