AtticFoil Radiant Barrier Foil Insulation | Radiant Barrier Department Of Energy Lab Test Results - (Understanding Reflectivity vs Emissivity) @AtticFoil | Uploaded September 2014 | Updated October 2024, 3 hours ago.
atticfoil.com/index.php/technical-info/dept-of-energy-study-results
Depending on which side of the double-sided product the air gap is one, AtticFoil will either use reflectivity to reflect heat, or emissivity to block it. Radiant barrier decking (ex. TechShield or Solar Board) uses emissivity, where as stapling AtticFoil to the bottom of the rafters uses reflectivity and is more effective at reducing heat transfer.