SuperFOIL SF40 is the UKs highest performing multi-layer foil insulation, used to reach levels 3, 4, 5 and 6 of the Code for Sustainable Homes. SuperFOIL SF40 maximises roof and wall insulation within an efficient amount of space.

SF40 is ideal for new build, extension and conversion projects and can be easily retro-fitted into buildings as it does not waste valuable and expensive floor space. SF40 can be used as an extra layer over and above traditional fibre insulations to "Super Insulate" your home and allow it to achieve it's maximum energy savings.


Key Features


  • Hot Box 'R' Value 3.564

  • Complies with building regs

  • Air seal & radiant barrier




  • Total coverage 15m2

  • Total thickness 60mm

  • Total layers 36



  • Horizontal or vertical fitting

  • 25mm air gap required

  • Cut with knife or scissors