Perforated Radiant Barrier Super R Plus 50G Aluminum Insulation Foil - All Sizes call_for_price Viper II Class C is

Viper II Class C is a unique high strength polyolefinbased under-slab vapor retarder specifically designed for preventing moisture migration through concrete slabson-grade

Unfaced insulation does not have this barrier

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this is the most cost effective harness of its class

Perforated Radiant Barrier Super R Plus 50G Aluminum Insulation Foil - All Sizes call_for_price Viper II Class C isSuper R Plus Perforated Radiant Barrier 50G Alum is designed for the professional or commercial installer. Its radiant barrier is thicker and heavier that Super R Diamond which makes the material easier to install. Super R Plus is also strong enough to be stapled to the attic rafters without ripping or tearing. For DIYer's, Super R Plus radiant barrier can be laid over existing insulation. Simply measure the space needed to be covered, roll on the