Multilayer reflective insulation roll product

A multi-layer reflective insulation system, comprising:

• a building structure with cavities;
• the cavities being defined in part by spaced apart cavity creating framing or furring strip members;
• and
• a sheet of multi-layer reflective insulation from a roll product overlaying and secured to the structure wherein the sheet of multi-layer reflective insulation consists of a first foil kraft paper laminate having a first major surface and a second major surface that are each defined by a length and a width of the first foil kraft paper laminate;
• the first major surface of the first foil kraft paper laminate overlaying the building envelope structure cavities;
• the first major surface of the first foil kraft paper laminate being a reflective foil surface having low emissivity;
• the second major surface of the first foil kraft paper laminate being a non-reflective kraft paper surface having high emissivity;
• a second foil kraft paper laminate having a first major surface and a second major surface that are each defined by a length and a width of the second foil kraft paper laminate;
• the first major surface of the second foil kraft paper laminate being a reflective foil surface having low emissivity;
• the second major surface of the second foil kraft paper laminate being a non-reflective kraft paper surface having high emissivity;
• the reflective first major surface of the first foil kraft paper laminate facing away from the second foil kraft paper laminate;
• the non-reflective second major surface of the first foil kraft paper laminate and the reflective first major surface of the second foil kraft paper laminate being located opposite and facing each other with only a separation media intermediate the opposed, facing major surfaces of the first and second foil kraft paper laminates;
• the separation media holding the first and second foil kraft paper laminates in a spaced apart relationship relative to each other and forming, with the first and second foil kraft paper laminates, a pliable reflective insulation laminate wherein the opposed major surfaces of the first and second foil kraft paper laminates are spaced apart a distance of 0.25 inches or less that is sufficient to create air space between the opposed major surfaces of the first and second foil kraft paper laminates to enable the reflective first major surface of the second foil kraft paper laminate to reflect incident radiation and emit radiation;
• the percentage of the surface areas of the opposed major surfaces of the first and second foil kraft paper laminates overlaid by the solid separation material of the separation media each being 50% or less and the percentage of the surface areas of the opposed major surfaces of the first and second foil kraft paper laminates exposed to the opposing major surface of the other foil kraft paper laminate each being 50% or greater.