Mineral fibres is used to achieve a level of proper insulation against the cold and the overheating of the House, (can be also derived from wood, as for example Cork, expanded recycled paper). Buildings of trunks, from 140 mm, do not necessarily need no additional insulation. The houses (W/m2C) heat transmission coefficient varies from 0.3 to 0.81 (depends on the type of structure). This clearly exceeds the maximum required by the standard NBE CT-79: between 1.20 and 0.60 for covers and 1.03 on the facades. With a similar isolation level can achieve savings of 30% 40% in heating and cooling of the building compared to traditional buildings.Who like them wood, we are sure that in your House you will install wood Windows and doors. It is a good choice, you will get an economic benefit since Windows and glass doors made of wood with a double or a triple glazing provides maximum energy savings.The thermal coefficient (W/m2C) of these Windows doors can vary from 3.0 to 1.7 (points of comparison: metallic carpentry, double glazed with 6 mm camera: k = 4.) Window with a single crystal: k = 5..