SuperFOIL SF40 is a premium multi-layer reflective insulation solution engineered to deliver enhanced thermal performance across roofs, walls and floors. Constructed from 40 layers of low-emissivity aluminium foil and insulating wadding, SF40 is designed to significantly reduce radiant, conductive and convective heat loss within the building envelope. With a greater layer count than standard multi-layer insulation products, SF40 provides improved thermal performance while maintaining a relatively slim profile. This makes it particularly suitable for projects where space is limited but higher insulation performance is required, including retrofit and refurbishment works. The product includes an integrated vapour control layer, supporting effective moisture management when installed as part of a properly designed system. SF40 also contributes to improved airtightness, helping to enhance energy efficiency and internal comfort. SuperFOIL SF40 is lightweight, flexible and easy to install, reducing installation time compared to traditional insulation materials. It is suitable for a wide range of construction types and is widely used in residential, commercial and social housing projects where reliable, high-performance insulation is required.