Abstract: The study presents the results of thermal efficiency of composite materials for construction purposes on the basis of clays of different mineralogical composition and glass porous component research. It is shown that the clay minerals such as kaolinite, montmorillonite and hydrous micas affect not uniformly the composite structure formation processes. X-ray diffraction and optical-visual analysis methods of new growth crystallization temperatures in composites based on mono and multimineral clays are set. It is revealed that the beginning of the interaction between clay minerals and glass porous component particles depends on the corresponding mineral crystal lattice destruction. The fragmented porous structure of the composites microreinforced with new growths provides high physical and mechanical properties of the materials. The influence of the mineralogical composition of raw clay on formation porosity composites formation is shown. The porous structure with predominance of open macropores is formed in composites based on kaolinite and mesopores in the presence of montmorillonite and hydromica.