Atlas EnergyShield Pro is a high-performance continuous insulation board composed of a closed-cell polyisocyanurate foam core with a reflective aluminum foil facer on one side and a white acrylic-coated aluminum foil facer on the other. It is manufactured using environmentally responsible processes and formulations, containing no CFCs, HCFCs or HFCs, resulting in Zero Ozone Depletion Potential (ODP) and Negligible Global Warming Potential (GWP). EnergyShield Pro is GREENGUARD Gold certified and contributes to LEED credits. Standard insulation board dimensions are 4'x8'.