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DriStud Repel

DriStud Repel is a green, quattro-laminate synthetic membrane consisting of two outer non-woven layers with scrim. Installed over wall framing, it provides the secondary weather-resistant layer which prevents the accumulation of moisture. It is suitable for use as temporary weather protection to allow interior works to continue inside the building without the exterior wall cladding fully in place.

DriStud Repel is a reinforced flexible wall underlay that allows work to continue on the inside of the building (for up to 90 days) without waiting for the cladding to be completed.

Key Features
  • CodeMark™ Certified
  • Fire Retardant (FR Index: 1)
  • UV Exposure: 90 days
  • Can be direct fixed to timber and steel-framing
  • Can be used where cladding is installed over a cavity system or direct fixed cladding
  • Can be used for residential and commercial buildings
  • Thick and Strong
Scope of Use
  • In accordance with the requirements of NZBC E2/AS1 — DriStud Repel is intended for use on buildings designed in accordance with NZS 3604:2011 paragraph 1.1 and in Wind Zones up to and including 'Extra High'
  • DriStud Repel may also be used in conjunction with oriented strand board, concrete, fibre cement and plywood
  • DriStud Repel can go behind cladding and can be installed over timber and steel framing. Where DriStud Repel is installed over steel framing, it is important to ensure an adequate thermal break has been installed.
  • DriStud Repel can be used as an air barrier in unlined wall spaces including gable ends
  • DriStud Repel is suitable for direct fixing behind non-absorbent cladding including metal cladding or over a nominal 18mm ventilated cavity per table 3, E2/AS1
  • Approved sealants and expanding foam listed in DriStud Repel Installation Guide
Limitations on Use
  • DriStud Repel is certified for use as a wall underlay and air barrier on buildings: a). within the scope of limitations of: i. NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area for timber-framed construction; or ii. NZBC Acceptable Solution E1/AS4, with regards to building height and floor plan area for light-steel framed construction, and b) situated in wind zones (as defined in NZS 3604:2011) up to and including 'Extra High', provided stud and fixing centres are no greater than specified in the DriStud Repel Installation Guide V1.0, February 2023, and c) with absorbent or non-absorbent wall claddings directly fixed to the frame; or installed over an 18mm minimum drained cavity; or with masonry veneer, in accordance with NZBC Acceptable Solution E2/ AS1 fo timber framed buildings or NZBC Acceptable Solution E2/AS4 for steel framed buildings, and d0 where the underlay is no exposed to view in an occupied space.
  • DriStud Repel shall be: a) installed in accordance with DriStud Repel Installation GuideV1.0, February 2023, and b) seperated from fireplaces, heating appliances. flues and chimneys in accordance with the requirements of NZBC Acceptable Solutions C/AS1 and C/AS2, Paragraph 7.5.9 for the protection of the combustible materials, and c) protected from sunlight within 90 days
  • Contribution to compliance with Building Code clause H1.3.1(b) is conditional on: a) the element incorporating Repel DriStud being part of the thermal envelope of the building, and b) horizontal and vertical laps being securely taped.
  • May be installed in conjunction with direct fixed and cavity systems where absorbent or non-absorbent claddings are specified.
  • Must be installed in accordance with the DriStud Installation Manual. This is available at www. Irrespective, TCL Hunt recommends that all conditions of the certificate are met. 
Statement of Building Code Compliance

When specified in accordance with the requirements of this certificate, DriStud Repel will comply with the following provisions of the NZ Building Code;

  • B1 Structure: B1.3.1, B1.3.3 (h), B2.3.2, B1.3.4
  • B2 Durability: B2.3.1(a), B2.3.2(a)
  • C3 Fire affecting areas beyond the fire source: C3.4(c)
  • E2 External moisture: E2.3.2 (contributes to), E2.3.5 (contributes to), E2.3.7
  • F2 Hazardous building materials: F2.3.1
  • H1 Energy Efficiency: H1.3.1(b) (contributes to) 
Technical Resources: DriStud Repel

Products include DriStud wall and roof underlays, Window Flashing Tape, Vent NZ passive ventilation system and Proctor construction membranes.

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