Multi-foil rolls are a type of insulation made of multiple thin, reflective layers of materials like aluminium foil or metallized PET foil, often combined with insulating wadding, foam, or polypropylene, all bound together. These rolls are thin, lightweight, and flexible, allowing them to be easily cut and installed in roofs, walls, and floors to reduce heat transfer (conduction, convection, and radiation), keep buildings warm in winter, cool in summer, and preventing condensation