ARDEX Butynol® Butyl Rubber Roofing Membrane System
- CM20182 Rev 2
- Valid from
- Information provider
- Ministry of Business, Innovation and Employment
- SAI Global Certification Services Pty Limited
- Information type
- Product Certificate (CodeMark)
ARDEX Butynol® is a flexible synthetic rubber waterproofing membrane supplied in rolls of 1.4m width and 17.86m long. Available in a range of thicknesses and colours:
- 1.0mm (black)
- 1.5mm (black)
- 2.25mm (black)
- 1.2mm (dove grey)
- 1.5mm (various colours).
ARDEX Butynol® is a single layer membrane applied to the outside of a substructure of a building for waterproofing decks, roofs, and box gutters.
The Ardex Butynol Membrane system must be installed by an Ardex NZ approved installer as per the ‘ ARDEX Butynol® Installation Instructions (May 2018)’.
The Ardex Butynol Membrane system may be used:
- a) In all exposure zones excluding microclimates (as per NZS 3604:2011 para 4.2).
- b) Up to 6.0 kPa ULS wind pressure differential for buildings subject to specific engineering design.
- c) Where the substrate is plywood sheet or suspended reinforced concrete slab, or polyiso insulation board.
- d) for all wind zones up to and including extra high for buildings within the scope limitations of NZBC. Acceptable Solution E2/AS1 para 1.1; or within the scope limitations of NZBC acceptable Solution. E2/AS1 with regards to building height and floor plan area subject to specific engineering design.
Unless protected by pavers or other protection, a minimum 1.5mm thick membrane must be used on a trafficable deck, in accordance with the Manufacturer’s Install Instructions ‘ARDEX Butynol® Installation Instructions (May 2018)’ & product datasheet ‘ ARDEX Butynol® Butyl Rubber Membrane (August 2019)’.
LOSP treated plywood must NOT be used as a substrate, as per the ‘Substrate Specifications For membrane Applications (December 2018)’.
The substrate structure must be designed and constructed to a fall not less than 0.57 degrees (1:100) to shed precipitated moisture. Allowance for deflection and settlement of the substrate must
be made in the design to ensure falls are maintained.