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DriStud W7 - White Faced Foil

DriStud W7 is a medium weight, extra heavy duty, fire retardant, white faced foil insulation specifically designed for commercial roofs and roof sarking with a high water barrier and medium vapour barrier classification. 

Due to its multi-layer structure DriStud W7 offers superior strength, durability and acts as a barrier to radiant heat, moisture, drafts and dust. 

When installed correctly with the white facing down and the reflective foil facing the air cavity it will also provide extra R-Value, a clean white finish and will increase light diffusion and reflection. 



Key Features
  • Fire Retardant
  • Extra heavy duty reflective foil insulation 
  • Superior strength, durability and tear resistance
  • Advanced resistance to heat
  • Vapour and moisture barrier
  • Light weight and flexible
  • 97% reflectivity
  • Excellent light diffuser
Scope of Use

DriStud W7 is designed for use on a roof and roof sarking in commercial, industrial and farm buildings in all regions of New Zealand. Durability may be affected by environmental factors, including airborne pollutants.

Limitations on Use
  • DriStud W7 is not designed to withstand prolonged direct exposure to the elements.
  • The outer construction envelope of this product should be installed the same day as the metal roof.
  • The Aluminium Foil should not come into contact with wet concrete or mortar, as the aluminium is susceptible to alkali corrosion. 
  • To ensure optimal thermal insulation performance, as well as satisfactory durability, a 25mm air space adjacent to the foil side of the product is recommended.
Statement of Building Code Compliance

DriStud W7 has been tested to AS/NZS 4200:1994 and meets all the requirements of the NZBC:

  • Clause B2 Durability: B2.3.1(b) (15 years)
  • Clause E2 External Moisture: E2.3.2
  • Clause F2 Hazardous Building Materials: F2.3.1
Other Performance Attributes
  • Total Weight: 119 ±5 g/m2
  • Flammability Index: AS1530.2-1993 Low
  • Duty: AS/NZS 4200.1:1994 Extra Heavy
  • Reflectivity: 97% 
  • Resistance to Water Penetration: AS/NZS 4201.4:1994 High
  • Vapour Barrier: ASTM E96 Medium
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
Product Technical Statement
Comparison Chart
Installation and Operation

Products include DriStud wall and roof underlays, Window Flashing Tape, Vent NZ passive ventilation system and Proctor construction membranes.

Product Enquiries

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