When building a country house, it is important to choose building materials. Traditional materials selected for the construction of country houses are wood and brick. The tree has excellent thermal insulation properties and retains the necessary microclimate inside the room. Wood is a building material of natural origin, wooden buildings are environmentally friendly, have excellent breathability. For the construction of wooden houses, pine, fir, spruce, larch, cedar are often used. Unfortunately, the tree is subject to damage to the fungus and decay. But today, compositions have been developed by increasing the stability of the tree to various influences.