DriStud F11 Foil Insulation Fire Retardant Heavy Weight Double Sided Foil

DriStud F11 is a fire retardant, heavy weight double sided reflective foil insulation, designed for use as insulation and condensation control under metal in commercial and industrial buildings. It is a high water barrier, medium vapour barrier product, ideal for steel roofs. It provides extra R-value from inward and outward facing reflective surfaces when used in conjunction with adjacent air spaces.

Roll sizes

  • 1350mm x 19m (25m2)
  • 1350mm x 56m (75m2)

Special Requirements

Buildings of the following types using metal cladding should have a sealed vapour barrier and are subject to specific design.

  • Swimming pools.
  • Buildings containing liquids stored in open containers.
  • Buildings where water is used in manufacturing, cleaning or storage processes.
  • Ice rinks, cold stores and freezers.
  • Buildings where unvented gas heating is used.

A vapour barrier incorrectly located on the cold side of a structure or poorly installed can result in a rapid build-up of cavity or interstitial condensation and result in high costs for rectifying defects and damage. Cold stores, freezers or buildings where the temperature is near or below 0° all require a fully sealed vapour barrier located on the warmer outer side of the insulation but are subject to specific design.

Physical Properties

Property Standard Value
Total weight 220 ±5 g/m2
Flammability index AS1530.2-1993 Low
Duty AS/NZS 4200.1:1994 Medium
Reflectivity Side A: 97%,
Side B: 97%
Resistance to water penetration AS/NZS 4201.4:1994 High
Vapour barrier ASTM E96 Medium


  • DriStud F11 has been tested to AS/NZS 4200:1994 and meets all the requirements of the NZBC Clauses B2,
  • Durability (B2.3.1[b] 15 years), E2 External Moisture E2.3.2, F2 Hazardous Building Materials F2.3.1.