Super FOIL SFTV1L is a high performance vapour control layer (VCL) & radiant barrier. ideal to be used as dry lining directly behind the finishing layer (such as plasterboard) SFTV1L minimizes the amount of warm moist air from inside the home entering the insulated wall roof or floor reducing condensation & helping to prevent longer term issues such as damp or rot. The highly reflective surface forms a radiant barrier returning heat to the living space reducing energy bills. Independently tested to the highest industry standards SFTV1L is fully waterproof & vapour resistant.