Building insulation materials is used depends on a wide variety of factors. Some insulation materials have health risks, some so significant the materials are no longer allowed to be used but remain in use in some older buildings such as asbestos fibers and urea. Factors affecting the type and amount of insulation to use in a building include: Considerations regarding building and climate: Often a combination of materials is used to achieve an optimum solution and there are products which combine different types of insulation into a single form. Spray foam is a type of insulation that is sprayed in place through a
Building insulation materials cannot satisfy people’s long-term need for thermal insulation.so, people began to search for substitutes which are more durable. In the 19th century, people are no longer satisfied with using natural materials for thermal insulation, they processed the organic materials and produced the first insulated panels. At the same time, more and more artificial materials start to emerge, a large range of artificial thermal insulation materials were developed, rock wool, fiberglass, foam glass, hollow bricks. Thermal insulation can be a significant role in the building, great demands of thermal comfort result in a large amount of energy consumed for full-heating