Foil Insulation – Multifoil – Roofs & WallsProduct Overview This 45mm high performance multi layer foil insulation is designed for insulating roofs, walls, and floors. It features a flexible multi layer reflective quilt, perfect for both new build and refurbishment projects. The insulation comprises reflective outer layers and internal thermal wadding, reducing heat transfer across building elements. Its quilt conforms easily to irregular surfaces and structural junctions. Supplied in a 15m