Fi-Foil’s Silver Shieldâ„¢ is an insulating product composed of multiple layers of low emittance (low-e) materials designed to significantly reduce radiant heat transfer. The inside layer is a metalized polymer. The outside layer is reinforced aluminum foil kraft paper bonded with a fire retardant adhesive. The layers expand when installed to form a reflective air space to provide enhanced thermal performance and protect the low emittance surface from the performance reducing effects of dust accumulation. Since metalized and foil-based aluminum products have a near zero water vapor permeance, Silver Shieldâ„¢ is perforated to allow water vapor transmission. Product applications include roofs and walls.
Radiant Barrier System (RBS) is a building construction consisting of a low emittance (0.1 or less) surface bounded by an open air space. An RBS is used for the primary purpose of limiting heat transfer by radiation. Reflective Insulation is thermal insulation consisting of one or more low emittance surfaces, bounding one of more enclosed air spaces. Reflective Insulations reduce radiant and convective heat transfer.