Before going to buy building materials, it is best to conduct a small analysis of information about which companies currently leading various materials in the production of various materials will get acquainted with the reviews of the products of these companies, get acquainted with the range of products that meets your and environmental requirements, as well as Make a comparison of prices for the same materials for various manufacturers. With the help of the Internet, such an analysis will not take much time. Most leading manufacturers have their own sites with a detailed description of the products and the price indicating. Also on such sites you can view all documentation for building materials, including sanitary and epidemiological certificates.