The heat loss rate may increase or decrease according to the usage purposes as well as the characteristics of the roof models. When designing the roof model, if spaces that allow the layers to breathe can be included, this roof model is called a cold roof. Roofs are divided into two as hot or cold roofs in terms of these features. In sloping roof models, more insulation area is formed on the vertical surface to be formed due to the slope. More insulation materials are used than flat roofs. Without the need to heat the roof space, the insulation materials covered by the floor prevent heat loss.