Building insulation materials weak and brittle. Before its risks were recognized, it was used because it was a cheap, effective insulator with a high R-value and its open-cell structure was a good acoustic insulator. Though it absorbed moisture easily, it regained effectiveness as an insulator when dried. Asbestos once found common use as an insulation material in homes and buildings because it is fireproof, a good thermal and electrical insulator, and resistant to chemical attack and wear. It has been found that asbestos can cause cancer when in friable form (that is, when likely to release fibers into the air - when broken,
Building insulation temperature standard in China, most old residential and commercial buildings in China doesn’t have any thermal insulation, even in the area that suffer a severe weather which is hot in summer and cold in winter. And the insulation material that often used in the new buildings of China is Styrofoam, which has difficulties in installation and low effectiveness of thermal insulation. Another problem is that the Styrofoam is not fireproof material, it will be a hazard if this material is widely used. Unlike the United States and Australia, the government institutes haven’t established a common standard about thermal insulation. More