Both dense and porous construction materials are widely used in civil and industrial construction. For example, lightweight concrete, cellular concrete, foam concrete and other types of lightweight concrete are used almost as widely as conventional concrete. However, for the production of walls made of ceramic materials, bricks with dense structure and hollow bricks still are the most popular building materials. Lower expenses related to the production of building materials having necessary properties will lead to decreased production costs allowing to increase the production capacity due to the economy of raw materials, other materials and fuel. According to the calculations, today, when the thermal resistance for wall structures has increased 2.5-3 times, having an average density of wall material 900- 1100 kg/m3 it is no longer possible to meet the requirements for the thermal resistance of the outer walls 460-520 mm in the climatic conditions of the Baltic region. It is necessary either to increase wall thickness or to use more efficient insulation materials which both are not cost-efficient solutions.