Products > Aerofit > Overview Aerofit Flexible insulation for tiled or slated pitched warm roof spaces Kingspan Aerofit Properties Download PDF Thermal conductivity 0.030 W/m.K Core High performance graphite enhanced expanded polystyrene that has zero Ozone Depletion Potential (ODP) and zero Global Warming Potential (GWP). Board sizes 1.2 x 0.525 m 1.2 x 0.425 m 1.2 x 0.375 m