DriStud W9 White Faced Foil Insulation

Fire Retardant Heavy Weight White Faced Foil

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Product Overview

DriStud W9 is a Heavy Weight, Fire Retardant, Medium Duty 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 W9 offers ease of installation 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.

We recommend using Safety Mesh or Hexagonal Netting to support DriStud W9.

Technical Properties

Total weight230 ±5 g/m2
Roll Sizes (m²)1350mm x 55.6m (75m²)
Flammability indexAS1530.2-1993≤5
Fire RetardantYes
DutyAS/NZS 4200.1:1994Medium
Resistance to Dry DelaminationAS/NZS 4200.1:1994Pass
Resistance to Wet DelaminationAS/NZS 4200.2:1994Pass
EmittanceAS/NZS 4201.5:19940.03
Resistance to water penetrationAS/NZS 4201.4:1994High (Water Barrier)
Vapour Resistance (MN.s/g)ASTM E96, Procedure Bless than 450 and greater than 7
Vapour barrierASTM E96˃3°Medium
Durability (years)15
Roof Pitch˃ 3°


  • Fire Retardant
  • Extra Heavy Weight, Reflective Foil Insulation and Radiant Barrier
  • High Tear Resistance
  • Vapour and Moisture Barrier
  • 97% Reflectivity
  • Excellent light diffuser

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.