The insulation of the roof is necessary to maintain the proper temperature. It keeps the room cool or warm for a long time, but at the same time protecting and building materials from wear that lead to changes in temperature. Thermal insulation materials are those which entrap the air in their mass and prevent him from getting into the inner spaces. Their choice depends on the location of the building, the cost, the application and the desired thickness of the construction. Divided into organic and inorganic, artificial and of course depending on their origin and the processing that exist before use. Examples: the expanded polystyrene (styrofoam), the extruded polystyrene, polyurethane, the Rockwool, Cork, the armoured concrete, etc. The points will be placed on the insulation, the thickness and the type are determined by many factors such as: the orientation of the building, how exposed is in the countryside, in the air and the Sun, the size and location of openings. Heat rises, and in non-insulated House, a quarter of the heat is lost through the ceiling. Insulating your loft, attic or flat roof is a simple and effective way to reduce heat, roof insulation plays an important role in reducing the amount of energy consumed for heating and cooling, and this in turn reduces your energy bills. Roof thermal insulation material, you can purchase many high quality roof insulation materials products of the world roof heat insulation.