Regardless of the type or slope of the roof, it is the most important part of the building envelope contributing to heat loss and energy efficiency. When you reduce heat loss through your roof, you need less energy to heat your entire house.
The external walls of a building function as a climate shield. They protect against cold, precipitation, strong winds, noise and fire. A good external wall structure, with the right insulation solution, is a prerequisite for a healthy and pleasant indoor climate.