Insulation

In combination with a fibrous insulation medium having a face oriented toward a cold side environment and an opposite face oriented toward a warm side environment, an article providing increased efficiency to said medium as both a thermal barrier and a vapor disperser, said article comprising:

• a first layer of material formed by a plastic sheet having closed cells of entrapped air with a first surface and a second opposite surface with said first surface being positioned adjoined said cold side face of said medium;
• a second layer formed by a metal foil sheet having a first surface and an opposite second surface, said first surface of said foil sheet being fixed to said second surface of said first layer so that said foil sheet is spaced from said medium by said first layer;
• and
• a third layer formed from a moisture absorbing sheet having a first surface and a second opposite surface, said first surface of said third layer being fixed to said second surface of said foil sheet and said second surface of said third layer being directed toward said cold side environment;
• said first, second and third layers further having passages extending therethrough from said first side of said first layer to said second side of said third layer to allow vapor collected within said fibrous medium to pass through said article and to regulate the passage of thermal energy through the fibrous medium and the said article.