FIELD: construction.
SUBSTANCE: invention relates to the field of building materials and relates to a support layer of an insulation panel for construction. Substrate layer of a multi-layer insulating panel for building structures includes: gas-tight reinforcing layer having a first surface and an opposite second surface; fire resistant layer, functionally associated with the first surface of the reinforcing layer, while the gas-tight reinforcing layer includes a plastic film.
EFFECT: invention provides for the creation of a substrate layer of an insulating panel for buildings, which has constant gas-tightness characteristics of the panel over time and improved flame retardant characteristics.
8 cl, 2 dwg
