SuperFOIL SFTV is the ultimate all-round building membrane for roofs, walls and floors. Water & vapour proof SFTV is also a foil radiant barrier that will reduce solar gain in summer and improve insulation in winter. SFTV's reflective properties add to the overall uValue of the building fabric. To achieve the maximum energy performance in new build and retrofit projects, SFTV makes an ideal 'airtight' layer suitable for the entire building envelope. Technical Layers: 3 - polypropylene reinforced heavy laminated foil. Width: 1.5m. Length: 25m. Coverage: 37.5m2. Colour: Silver. Weight per roll: 4.8kg. Thermal insulation values including 2x air gapsRoof: 0.95 R.Wall: 1.42 R.Floor: 2.8 R. Features Waterproof. Vapour proof. Air tight. Radiant barrier. Helps to prevent mold & damp. Enchances thermal resistance.