The article analyzes the factors affecting the longevity of insu-lating systems and the operational resistance of products based on mineral fibers. It is emphasized that the ratio of acid oxides contained in the charge to the main oxides is the main factor influencing the operational resistance of mineral fibers, as well as the energy intensity of their production. A hy-pothesis has been put forward and confirmed that the operational resistance of a fiber depends on the content of heavy metals (their oxides) in the ini-tial charge. Determination of the elemental composition of stone wool samples was carried out by X-ray fluorescence analysis. Conducted sam-ples with a different acidity module of the study, show, that the fibers are safe by radiation indices, and their operational resistance can be affected by heavy metal oxides. It is substantiated that the durability of building systems in which mineral wool products are used as thermal insulation is determined by the properties of mineral wool products, the literacy of de-sign solutions and the quality of installation. The properties of mineral wool products, including their operational resistance, depend on the prop-erties of mineral fibers and the observance of technological regimes both on the fact of the most complete curing of the binder and on the features of formation of the volume-oriented structure of the mineral wool carpet.

Clay-gypsum of each deposit are ecologically safe natural materials. They differ from others in their mineralogical and phase composition, they have different properties. Such a spread of properties of natural clay-gypsum, including after their heat treatment, makes it difficult to process them and, ultimately, use. The factor of "unpredictability of the obtained results" is one of the reasons why this type of natural composites are practically not used in modern construction. The paper presents the results of studies of the properties of model compositions of a clay-gypsum binder. The theoretical basis of the research is the methodology for the creation of new building materials, developed at the MSUCE. According to the proposed provisions, the properties of composite (or multicomponent) systems can be evaluated using the concept of a model body, in our case a "model material", manufactured with observance of certain technological parameters. According to the results of the first stage, the optimum temperature for calcination of an artificial clay-gypsum binder (which was 230-250°C) was established, and a graphical interpretation of the results was carried out using triple diagrams. By results of researches it is established, that the majority of natural structures in the natural state, or after modification can be used as a basis for reception of interior plaster mixes.

The article outlines and substantiates the theoretical principles of the creation of cellular concrete reinforced with mineral fiber with the use of secondary products of housing renovation. The advantages provided by the dispersive reinforcement are the reduction in the economic costs of the construction of facilities, ensuring their reliable and durable operation. In this case, an important contribution is the alkali resistance of mineral fibers, the evaluation of which was carried out using the technique of an elemental composition based on the use of a spectrometer. On an example of research of technology of cellular concrete reinforced with alkali-resistant mineral fiber; Methods for evaluating the importance of factors characterizing technological processes, constructing polynomials of nonlinear regression, analytical optimization, selection of composition and evaluation of characteristics of raw components were tested. Reinforced with mineral fiber constructions can be built on weak grounds and effectively solve the problems of saving energy and raw materials.

The article, on the example of pipeline insulation systems, outlines the fundamentals of the concept of environmentally sustainable construction, including requirements for materials, constructional systems in which these materials are used, engineering systems and work technologies. Insulation based on polyethylene foam technology of its installation meets the requirements of EcoMaterial Basis or EcoMaterial Green. Polyethylene is absolutely safe for humans and its base is polyethylene, which used in the food industry (packaging or boxing) and in medicine (prosthetics). A specific feature of polyethylene foam, like most types of foamed (gas-filled) plastic materials, is combustibility, expressed depending on the consumption and effectiveness of flame retardants, to one degree or another. During operation in the temperature range from -60 to +90 °C, the properties of materials are stable and no harmful emissions occur. The installation of the insulating sheath fixed by an glue method and is not associated with processes that are dangerous for humans and harmful to the environment. The article presents the main provisions of methods for calculating insulation systems based on polyethylene by measure of energy efficiency, which is defining, including the environmental assessment of insulation systems. The optimum thickness of polyethylene foam has been determined, as well as the recommended insulation thicknesses to ensure a given (safe for humans) temperature; to prevent moisture condensation on the surface of the insulating layer. An calculated time has been established during which thermal insulation prevents cold water from freezing when at an emergency stop of its movement in pipelines in the winter.

The article outlines the basic requirements for pitched roof insulation systems. The analysis of the properties of thermal insulation materials used in insulation systems was conducted. It is substantiated that the thermal resistance of such structures on the surface of the roof is formed taking into account the thermal conductivity of thermal insulation, thermal conductivity of wooden rafters and heat loss through the leakiness of joints and mounting devices. An assessment was made of the effect of loads of various types on the heat-insulating layer, namely: the effect of the air flow in the ventilated gap; the movement of the vapor-air mixture in the material; condensation of water vapor and penetration of drip liquid; exfiltration of air at the joints of the plates and on the surfaces of contact with the supporting structures. The expediency of using products on the basis of unstitched polyethylene foam in the construction of pitched roofs with a wooden roof system, taking into account the advantages and features of this material, as well as taking into account the possibility of creating a seamless insulating shell, is substantiated.