ABSTRACT
This article is aimed at studying the heat-protective properties of enclosing structures. The method models operating conditions in which thermal insulation product absorb moisture from both sides at high relative humidity of air (100%) and pressure difference of water vapour over a long period of time. The moisture absorption by diffusion of mineral wool and polyisocyanurate was obtained after 28 days of exposure to temperature and pressure drop of water vapor. Significant changes in moisture content of mineral wool were observed. From the results obtained, it can be concluded that polyisocyanurate has a lesser absorption property of water vapour, which is an important attribute in avoiding costs of upgrading the sources of thermal energy.
