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RainArmor Self Adhesive Roof and Wall Underlay
Description

RAINARMOR Self Adhesive is three-layer product coated with a water vapour permeable adhesive, which is designed for to protect rigid substrates with the need for mechanical fixings, such as staples. It will provide temporary weather protection during construction (maximum 120 days).

Key Features
  • Ideal for prefabricated systems.
  • Water resistant and water vapour permeable product.
  • Split release liner located 250mm from the top of the underlay to assist with installation.
  • Unaffected by LOSP or other solvent based treated timber. However, LOSP or other solvent based treated timber must have sufficient time for the solvent to flash off in a well-ventilated area. Recommended minimum 7 days.
  • Typical construction sealants and expandable foam will not bond to RAINARMOR Self Adhesive underlay. Apply Thermakraft's Thermaflash window flashing tape as a separation layer to achieve the required sealants and expandable foam bonding strength.
  • The underlay component of RAINARMOR Self Adhesive is made in Poland and then adhesive coated in Germany.
  • RAINARMOR Self Adhesive is not subject to a warning or ban under section 26 of the Building Act 2004 when used as per the product scope.
Scope of Use

RAINARMOR Self Adhesive can be used on roofs and walls on both residential and commercial buildings within the following scope:

  • Can be used in most cavity fixed roofs using a counter batten system and other proprietary roof systems in accordance with the design of the proprietary system supplier.
  • With absorbent wall claddings (e.g. timber, brick or fibre cement) or non-absorbent wall claddings (e.g.metal or plastic) cavity fixed.
  • Situated in NZS3604:2011 and NASH Building Wind Zones up to (and including) “Extra High” when used as a flexible underlay over a rigid substrate.
  • RAINARMOR Self Adhesive has been tested with the following rigid substrates: Kingspan Kooltherm K12 Framing Board, James Hardie RAB, ECOPLY EcoBarrier and GIB Weatherline.
  • RAINARMOR Self Adhesive is an air barrier and is suitable to be used with rigid substrates that do not have air barrier properties.
  • Refer to BRANZ Appraisal No. 1277 for full details.
Limitations on Use
  • Must be stored in clean dry conditions, not in direct sunlight.
  • Must NOT be exposed to the weather or UV for more than 120 days
Statement of Building Code Compliance
  • RAINARMOR Self Adhesive has been BRANZ appraised with the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 and NASH Building Envelope Solutions, with regards to building height and floor plan area.
  • RAINARMOR Self Adhesive has also been BRANZ appraised for use on buildings subject to specific weathertightness design. Building designers are responsible for the building design and for the incorporation of RAINARMOR Self Adhesive into their design in accordance with the declared properties and the instructions of Kingspan Insulation NZ Ltd.
Documents
Data Sheet

Issue 1.0, November 2024

BRANZ Appraisal 1277

No. 1277 [2025]

Installation and Operation

Issue 1.0, November 2024

Kingspan are New Zealand’s leading provider of high-performance insulation products and complementary Thermakraft range of premium wall & roof underlay products, flashings tapes & underlay mesh.

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