3 mm Reflective Insulation Roll Foam Core Radiant Barrier Garage Door Insulation Multi Purpose Foil Insulation for Window Attic Greenhouse Car Multiple DIY Applications (24 Inch x 50 Ft) - Amazon.com
Radiant Barrier In Difficult Or Low Pitch Attics - (It's SUPER Easy With Two People) - YouTube
Best Install Method - AtticFoil™ Radiant Barrier - Do-It-Yourself Professional Grade Radiant Barrier