The thesis describes various uses of clay materials in the construction of residential houses. The characteristics of the clay are described in the context of natural building materials. The following sections explain the technique of building houses by using clay materials. The main purpose of this thesis is to describe the use of clay material as a basic element of structural assemblies. The computer program U-Wert was used to calculate physical properties of heat transfer and vapor diffusion in selected cases of structural assemblies. Analyses showed that the house, built of clay and other natural materials is energy efficient and complies with all the requirements of the current Slovenian legislation. Characteristics of thermal insulation and protection against moisture are comparable to
other modern building materials. It is evident clay houses are adequate with ecological standards about transport, recycling and energy saving.