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2. Rigid panel - Wikipedia

   en.wikipedia.org/wiki/Rigid_panel

   It is virtually airtight if installed without gaps between adjacent panels, taping the seams. It reduces heat conduction through the wall frame when used as sheathing. Rigid panels with a radiant heat barrier facing foil will significantly improve the insulating properties by reflecting infrared solar energy before penetrating the wall or ceiling.

3. Vapor barrier - Wikipedia

   en.wikipedia.org/wiki/Vapor_barrier

   Vapor retarder paints (for the air-tight drywall system, for retrofits where finished walls and ceilings will not be replaced, or for dry basements: can break down over time due to being chemically based). Extruded polystyrene or foil-faced foam board insulation. Exterior grade plywood, 0.70 US perm (40 SI perm).

4. Building insulation material - Wikipedia

   en.wikipedia.org/wiki/Building_insulation_material

   Foil-faced polystyrene. This laminated, high density EPS is more flexible than rigid panels, works as a vapor barrier, and works as a thermal break. Uses include the underside of roof sheathing, ceilings, and on walls. For best results, this should not be used as a cavity fill type insulation. Foil-backed bubble pack.

5. Radiant barrier - Wikipedia

   en.wikipedia.org/wiki/Radiant_barrier

   When radiant solar energy strikes a roof, heating the roofing material (shingles, tiles or roofing sheets) and roof sheathing by conduction, it causes the underside of the roof surface and the roof framing to radiate heat downward through the roof space (attic / ceiling cavity) toward the attic floor / upper ceiling surface.

6. Radiator reflector - Wikipedia

   en.wikipedia.org/wiki/Radiator_reflector

   Radiator reflector panels being installed behind a domestic radiator. A radiator reflector is a thin sheet or foil applied to the wall behind, and closely spaced from, a domestic heating radiator. The intention is to reduce heat losses into the wall by reflecting radiant heat away from the wall.

7. Vacuum insulated panel - Wikipedia

   en.wikipedia.org/wiki/Vacuum_insulated_panel

   A vacuum insulated panel (VIP) is a form of thermal insulation consisting of a gas-tight enclosure surrounding a rigid core, from which the air has been evacuated. It is used in building construction, refrigeration units, and insulated shipping containers to provide better insulation performance than conventional insulation materials. [1] [2]