Behaviour of materials in relation to heat (calculation of thermal transmittance and assessment of thermal insulation adequacy). Reference to the relevant regulations (K.En.A.K., Technical Instructions T.E.E., etc.). Behaviour of materials in relation to water (water vapour condensation, calculations and protection methods). Behaviour of materials in relation to sound (sound absorption, sound insulation, the role of materials in the environmental comfort of the user in space, interaction and influence on architectural composition).