The study and the analysis of the data about a high flammability (class KM5), combustibility (В3), inflammability (class G3-G4), velocity of burning velocity speed (РП3), smoke generation capacity (D3), toxicity of combustion products of the polystyrene foam which have an over-cumulative action (carbon oxide, hydrocyanic acid, benzyl, phenyl ethylene) (Т3 – Т4) were carried out. It was suggested to reduce the use of the polystyrene foam in construction by means of replacing it with inflammable materials.

Keywords: polystyrene foam, flammability, toxicity, maximal allowable concentration (MAC), carbon oxide, carbon dioxide, hydrocyanic acid, benzyl, phenyl ethylene, thermal destruction, smoke formation.

The sorption capacity of some types of dust in the production of building materials, structures and products. For example, cement and wood dust being suspended in the air of the working area or in the air, absorbs substances higher hazard class.

Keywords: cement dust, wood dust, sorption capacity, fractional composition, hazard class

The article studies the method of the distant measurement of the concentration and the disperse content of the dust in the air of living and working areas in the real time mode. The use of the laser sounding as a highly precise method of measurement and air quality control is based. The results of the implemented research are displayed. The device that was used for the studies of the concentration of the disperse dust content is analyzed. Its use for the control of the air quality of the city atmosphere is based.

Keywords: dust, suspended solids, concentrations, disperse content, working zone, living zone, laser sounding, safe working conditions, ecological monitoring, optical method