AbstractThe results of research on the production of porous glass materials for thermal insulation based on silica-containing technogenic waste and nepheline are presented. The effect of modifying additives on the physical and technical properties of foamed materials is studied, and their optimal quantity and ratio are determined. It is shown that the introduction of a mixture of chalk and gypsum into the charge can significantly increase the strength (by a factor of 1.8–2) and reduce the water absorption of foam glass materials.