Ventia Metal Wall and Roof Underlay with Drainage Mat
Product Description
VENTIA METAL Roof & Wall underlay with DRAINAGE MAT
A specialized, highly breathable, Branz Appraised roof and wall underlay (Ventia Iron 1137 & 1136) with an integrated drainage mat pre-applied.
Branz recommend this type of product is the most effective way to Retrofit wall Insulation in existing homes where the cladding is not being removed.
https://www.buildmagazine.org.nz/articles/show/insulating-external-timber-framed-walls
https://www.branz.co.nz/pubs/research-now/warmer-drier-healthier/warmer-drier-healthier-7/
Designed for use under open-pan style metal roofing such as - Eurostyle, TRS Standing Seam, ESPAN, Eurotray, or Euroline where specific drainage and ventilation is required.
It can help reduce the "oil canning" issue in long run open-pan/tray style roofing sheets.
Suitable for all climate zones in New Zealand, and for use where early close-in is required.
Suitable for Extra High wind zones. 90 Days UV Exposure.
Can be used directly on Plywood Sarking and RAB wall systems.
Not suitable for roof pitches less than 3 degrees. Roof pitch below 3 degrees require a Specific Engineering Design.
