The international experience of scientific research and its practical implementation in modern energy-efficient construction accumulates various options for competitive energy-efficient enclosing structures. One of the alternative solutions is the use of three-layer wall blocks with a heat-insulating layer of low-thermal conductivity concrete, monolithically bonded to the outer layers of structural concrete. A distinctive feature of manufacturing this structure is the sequential laying of all layers in a single technological cycle, which ensures their reliable adhesion and eliminates the need to install discrete connections between layers that are heat-conducting inclusions. The scope of application of such blocks is self-supporting walls within a floor in multi-storey or high-rise housing construction, as well as load-bearing walls in low-rise and cottage construction. For their application in different climatic conditions, the layers of blocks can have different geometric characteristics and be made of concrete with different physical and mechanical properties, which together form the required thermal and physical properties of external three-layer walls.