DuPont„ AirGuard Reflective is a 100% air tight air & vapour control layer (AVCL) featuring a metallised surface with a very low emissivity, which combined with a non-ventilated airspace significantly boosts thermal insulation in a building. It can be installed in roofs, below ceiling levels as well as in walls. With the combination of the metallised vapour-open membrane Tyvek Enercor, DuPont„ AirGuard Reflective offers two main advantages: Thermal comfort - it provides protection against heat loss by radiation and convection. An efficient moisture management - it provides effective control against interstitial condensation both by diffusion and by convection. Technical Specification Roll Size: 1.50 m x 50 m. Roll weight: 11 kg. Mass per unit area: 149 gr/ m2. Water vapour transmission (Sd): 2000 m. Emissivity: 0.05. CE  marking: Yes.