Ventia Platinum Plus Heavy Duty Commercial Underlay - Roof Underlay NZ | ArchiPro

Ventia Platinum Plus Heavy Duty Commercial Underlay

The Ventia Platinum Plus Heavy-Duty Underlay is a self-supporting underlay for low pitched roofs, this saves money and time.

It is super strong, highly absorbent, with exceptional breathability.

Ventia Platinum Plus meets and exceeds the requirements of the New Zealand Building Code (BRANZ Appraisal No. 1167 (2021). 

The features of the Ventia Platinum Plus Heavy-Duty Underlay include:

  • Self-supporting.
  • No support required for low pitched roofs (less than 10° and a minimum of 3° when span is 1200 mm or less and horizontally installed.
  • Withstands significantly longer than 7 days UV exposure. (The roof cladding should be completed by day seven as per NZBC)
  • High absorbency.
  • Avoids condensation thus prevents long-term damage.
  • Exceptional breathability.
  • Avoids condensation and helps reduce or avoid the health issues associated with dampness.
  • Thanks to its high breathability it can be used directly on the thermal insulation layer without the need for a ventilation gap.
  • Very high tensile strength and tear resistance.
  • Allowing this underlay to be suitable to the following wind zones.
  • Low (115.2 kph), Medium (133.2 kph), High (158.4 kph) ,Very high (180 kph) and Extra high (198kph)
  • Fire retardant.
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