For thousands of years, a person has been using wood to build housing and manufacturing home utensils. Natural wood has become widespread due to its accessibility and unique characteristics. The wood is strong enough to serve as a support for the walls of the building, but it has a certain flexibility, it is not difficult to process and, in the end, this is one of the most environmentally friendly materials. Thanks to the rapid development of woodworking equipment, the market is replete with different types of building materials from wood. These materials are widely used in construction. Wood is quite durable material, but there is nothing eternal in nature. This is especially true for the materials of natural origin, including wood. Nowadays it is very fashionable to build houses and finish the inside with a tree. Such houses are called environmentally friendly. But many are faced with a rather serious problem, namely, the fact that wood is subject to various types of destruction. The cause may be insects, mold, moisture, fungi or other. These negative consequences are usually manifested after two to three years. In order to prevent this, it is necessary to carry out special processing of wooden building materials before construction. Processing is carried out by antiseptics, oils and substances that prevent the fire of the tree.