DuPont™ Tyvek® Supro

Building Solutions | DuPont™ Tyvek® Supro

DuPont™ Tyvek® Supro Roof Underlay

Drawing from more than 20 years of international manufacturing experience in the field of construction, DuPont™ Tyvek® Supro is a roof underlay that has been proven worldwide to be durable and to perform in extreme environments.


DuPont™ Tyvek® Supro Roof Underlay

An underlay is a key component of the roofing structure, and provides an important element in the weather tightness of a roof cladding system. The underlay acts as a secondary barrier to water ingress from the external environment while also helping to control internally generated moisture. Their function in terms of building durability is important and their on-going performance needs to be preserved to guarantee the life of the building


Features & benefits

Feature Benefit
Unique flash spun HDPE patented product with absorbent and anti-slip non-woven top layer
  • Durability
  • High Tensile strength and lightweight
  • Excellent Water Hold-out
  • Total building envelope system
  • High Water Vapour Permeability / Suitable from Arizona to Artic weather conditions

    Physical properties

    Method Unit Value
    Australian Building Code and AS/NZS4200 Test Method Requirement DUPONT TYVEK SUPRO/SUPRO PLUS (2506B)
    Australian Code Compliance CodeMark ABCB NCC2019 Deemed to Satisfy / Alternative Solution CodeMark CMA-CM40190
    Duty Classification Table 1 AS/ aNZS 4200.1:2017 Medium Extra Light
    Vapour Permeability ASTM E96 > 0.14µg/N.s > 3.5µg/N.s
    Vapour Resistance ASTM E96 < 7.0MN.s/g < 0.3MN.s/g
    Vapour Control Classification ASTM E96 Class 4 Class 4
    Emittance AS/NZS 4201.5 Non-reflective Non-reflective
    Water Barrier AS/NZS 4201.4 water barrier Water barrier
    Absorbency AS/NZS 4201.6 Unclassified Unclassified
    Resistance to Dry De-Lamination AS/NZS 4201.1 Pass Pass
    Resistance to Wet De-Lamination AS/NZS 4201.2 Pass Pass
    Shrinkage AS/NZS 4201.3 <0.5% 100%
    Electrical Conductivity Classification AS/NZS 3100 Electrically non conductive non-conductive
    Folding Endurance (MD) AS/NZS 1301.423 log10 folds pass
    Folding Endurance (CD) AS/NZS 1301.423 log10 folds pass
    Mechanical Strength - -
    Tensile (MD/CD) AS 1301.448 > 9.5kN/m & 6.0kN/m 6.3kN/m & 5.0kN/m
    Edge Tear (MD/CD) TAPPI T470 65N 305N & 254N
    Burst Strength AS2001.2.19 >200N 356N
    Flammability Index AS/NZS 1530 Part 2 ≤ 5 ≤ 5
    Weight / Width - - 145gsm / 1500mm
    Length - - 50m
    Area - - 75m²

    An underlay needs to:

    • Resist water and air penetration from above

    • Facilitate water vapour transmission from within by retaining and releasing condensed water as required

    • Protect insulation – thus promoting energy efficiency

    The long-term performance of any underlay (Kraft or synthetic) can be highly dependent on the environmental conditions it is exposed to within the roof cavity. Condensation and moisture related issues can be managed by careful consideration of the roof design, ventilation used and climatic conditions of the area. Refer to the DuPont™ Tyvek® Supro technical datasheet for specific requirements.

    Tyvek® Supro Metal - Protect Your Roof with a Metal Roofing Underlay.

    DuPont™ Tyvek® Metal is a roofing drainage underlay which drains away the condensation that can build up beneath the cladding on standing seam metal roofs.

    Tyvek® Metal roofing underlay is vapour-permeable, yet water-resistant and airtight. When used in combination with genuine Tyvek® accessories it can help to reduce condensation, improve overall airtightness, add thermal efficiency, and protect structural integrity.

    Besides allowing condensation beneath stainless steel, aluminium, copper, and zinc roofs to drain away, Tyvek® Metal also reduces sound transmission such as rain clatter, and minimises material stress by permitting a degree of movement between the cladding and the timber beneath.

    Key Benefits of DuPont™ Tyvek® Metal

    • Water-resistant

    • Airtight

    • Vapour-permeable

    • Allows movement and reduces material stress by providing separation between metal sheets and timber substrate.

    • Reduces rain clatter and sound transmission.

    Fitting Tyvek® Metal

    Tyvek® Metal roofing drainage underlay is fitted beneath standing seam metal sheet roofs and the underlying timber boarding. The use of 150mm wide timber boarding with 2mm gaps between is recommended.