Abstract: A barrier structure comprises: a first membrane substantially reflective of electromagnetic radiation; a second membrane spaced apart from the first membrane and bound to the first membrane about an edge thereof to form a bladder, the second membrane resistant to vapor transmission; and a fibrous insert disposed between the first membrane and the second membrane so as to maintain the spaced apart relationship, the fibrous insert defining a space holding an insulating medium resistant to the transmission of thermal energy and interspersed therethough. The first membrane may further comprise a multilayer composite and may include a polymer resistant to vapor transmission, for example including at least one of H2O, CO2 and O2. The polymer may be a polyester. The multilayer composite may further comprise a structure substantially reflective of thermal energy. The composite may further comprise one or both of an outer metallization layer and an inner metallization layer.

Abstract: A barrier structure comprises: a first membrane substantially reflective of electromagnetic radiation; a second membrane spaced apart from the first membrane and bound to the first membrane about an edge thereof to form a bladder, the second membrane resistant to vapor transmission; and a fibrous insert disposed between the first membrane and the second membrane so as to maintain the spaced apart relationship, the fibrous insert defining a space holding an insulating medium resistant to the transmission of thermal energy and interspersed therethough. The first membrane may further comprise a multilayer composite and may include a polymer resistant to vapor transmission, for example including at least one of H2O, CO2 and O2. The polymer may be a polyester. The multilayer composite may further comprise a structure substantially reflective of thermal energy. The composite may further comprise one or both of an outer metallization layer and an inner metallization layer.