The main issue of the theoretical part of the study is a choice of structures and materials for enclosure structures. The materials selected determine such parameters as Energy Performance of Buildings, thermal protecting, durability etc. The objective of the article is to solve the problems of durability of the materials selected as well as the long-term recoupment of enclosure structures. The results of the study show that lightweight-aggregate concrete with low conductivity the most balanced on all index. It has a durability as at construction materials and low conductivity. In article the impossibility of refusal of use of traditional materials is proved. The method of gradual decrease power delivery of the building, by gradual decrease in indexes of a elementary discharge of thermal energy was offered.