*2-in-1 Vapour Control Layer and High Performance Thermal Barrier *High Grade Aluminium for Ultra-Low Emissivity and Optimum Performance *Glass-Fibre Reinforced for Robust Construction and Durability *Certified High Vapour Resistance Prevents Condensation *Thin, Lightweight and Flexible- Quick and Easy to Install 2x Roll of SuperFOIL SFTV1L High Performance Reflective Membrane - 1.2m x 20 - 48m² coverage SuperFOIL SFTV1L is a high performance reflective aluminium membrane with two main functions- vapour control layer (VCL) and radiant barrier. Ideal for use as dry lining directly behind your finishing layer (such as plasterboard), SFTV1L minimizes the amount of warm air from inside your home entering your insulated wall, roof or floor. SFTV1L reduces condensation and helps prevent longer term issues such as damp or rot.