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Roof Pitch:

Supported or Self Supporting:

Breathable: Any Yes No
Vapour Control Layer: Any Yes No
Air Barrier: Any Yes No

Products  >  Underlay  >  Wytex 369
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Wytex 369

Designed to be used in Garages, Farm Buildings and Sheds with a discrete yellow print on the cladding side, giving a clean white light difuse appearance from the inside of the building.  Can be used direct fix or cavity fix for roof or wall construction, more stable and shrink resistant than the kraft based Underlays. May be installed during adverse conditions (rain) without affecting durability or performance. Will not increase risk of condensation as compared with comperable kraft underlays.

Key Features

  • Light Diffuse, clean white appearance
  • Fire Retardant

Advantages

Can be used direct fix or cavity fix for roof or wall constructionIs more stable and more shrink resistant the kraft based Underlays. May be installed during adverse conditions (rain) without affecting durability or performance. Will not increase risk of condensation as compared with comperable kraft underlays. Has a tear resitance greater than 140N.  Can be lined and insulated at a later date, meeting NZ Building Code E2/AS1.

PropertiesUnit
Construction:
Non-Woven / Breathable Film / Non-Woven
Basis Weight (g/m²):
130
Roll Sizes (m²):
1350mm x 50, 1350mm x 75
Roll Weight (kg):
6.5, 9.75
Flamability (Fl):
≤ 5
Water resistance (mm):
Requirement: 100mm (Roof Underlay)
Pass: Yes
Vapour Permeability (µg/N.s):
> 3.0
Vapour Resistance (MN.s/g):
< 0.5
Requirement: ≤7.0
pH Extract (pH):
Requirement: 5.5-8.0
Pass: Yes
Shrinkage (%):
Requirement: ≤ 2%
Pass: Yes
Air Barrier:
--
Durability (Years):
15
Max UV Exposure (days):
7
Wind Zone:
Very High
Requirement: R1/R2/W1/W2
Absorbency (g/m²):
> 150
Cavity:
--
Cladding:
Direct Fix Absorbent Cladding, Direct Fix Non Absorbent Cladding, Direct Fix Metallic Cladding
Breathable:
is_breathable
Vapour Control Layer:
--
Roof Pitch:
≤ 8°
Supported:
Supported
Fire Retardant:
fire_retardant