Description

Hydrotech (MM6125) Membrane System (the system) is a monolithic membrane made from a formulation of refined asphalts and synthetic rubbers, and accessories.

The MM6125 is applied in two, 3 mm layers with a fabric reinforced layer sandwiched between these layers.

The system provides a flexible, seamless, self-healing monolithic membrane. 

The system has been assessed as a waterproofing membrane solution for use in cold and green roof and deck assemblies, and protected membrane roof and deck (PMR) assemblies.

Scope

1. The system is certified to be used on buildings:

• a. Where:
  • i. for new buildings, the primary structure and substrate has been specifically designed by a chartered professional engineer in accordance with NZBC Verification Method B1/VM1 amendment 21 (2 November 2023), or
  • ii. For existing building where additional loads from an overlay are applied, the suitability of the existing building and substrate has been confirmed and documented by a chartered professional engineer and submitted as part of the building consent application.
• b. Situated:
  • i. in any wind zone or subjected to any design wind pressures, and
  • ii. in all exposure zones, excluding microclimates, as defined by NZS3604: 2011, and
• c. where the substrate for the membrane is reinforced concrete substrates with
  • i. any pitch including zero pitch defined as less than 1:100/0.5^o, and
  • ii. gutters with a minimum of 1:100/0.5^o fall.

2. The system shall:

• a. be designed, installed and maintained in accordance with the requirements of the following documentation:
  • i. MasterSpec ALLCO HYDROTECH® MM6125 RUBBERISED ASPHALTWATERPROOFING 4414H (version 1.0)
  • ii. Allco Hydrotech Details Manual (V1.3)
  • iii. Allco Membrane Roofing Solution - Care and Maintenance - Hydrotech Membrane. Version 3 - 2025
  • iv. Monolithic Membrane 6125 Pre- Installation & Application Guidelines (June 2004)
  • v. Allco Substrate Checklist - Concrete (V4 2022)
  • vi. Allco Hydrotech Pre-Installation checklist (V2.1)
• b. be protected as follows:
  • i. on PMR assembly or when trafficable cold roof/deck assembly is required: one of the following overlays shall be installed over the insulation layer and shall not subject the membrane to compression pressure exceeding 680 kPa:
    • 1. Pavers or floating timber deck on pedestals
    • 2. Ballast (graded stones)
    • 3. Green roof
    • 4. Concrete topping slab
  • ii. on a non-trafficable cold roof/deck assembly or where only maintenance related traffic is expected: the membrane shall be protected with a layer of Hydroflex 30 or Casali Olympia.
• c. be separated or protected from heat sources such as fireplaces, heating appliances, flues and chimneys. Part 7 of NZBC Acceptable Solutions C/AS1, 2d Edition (02 November 2023) - C/AS2 amendment 3 (02 November 2023) and NZBC Verification Method C/VM1 2d Edition (02 November 2023) provide methods for separation and protection of combustible materials from heat sources.

3. Electronic Field Vector Mapping (EFVM) shall be installed for all PMR assemblies and for Cold Roof assemblies where the overlay is ballast, green roof or concrete topping slab. Where EFVM is installed, the completed membrane shall be electronically tested for damage (and repaired where necessary) prior to the application of the covering layers.

4. Where the membrane is used to line a gutter, the gutter shall have sufficient flow capacity to handle the runoff from the particular roof catchment area in accordance with Acceptable Solution E1/AS1 Amendment 10 (5 November 2020)

5. Access to drainage outlets must be provided for inspection and maintenance.

6. When fabric reinforcement used, overlap between sheets shall be at least 75 mm and fully sealed by the membrane

7. Vegetation used on green roof applications shall be compatible with the root barrier specification.

8. This certification does not include:

• a. The weathertightness design of junctions for each specific substrate structure and control joints
• b. The design, specification, supply and installation of insulation (in PMR) and protection overlays described in limitation 2(b) including the effects of wind falls

9. An Allco Design Declaration, signed by the designer, that the conditions of this certificate relevant to the design phase have been met shall be submitted with the Building Consent application

10. An Allco Installation Declaration, signed by the Allco approved installer, that the conditions of this certificate relevant to the installation phase and the design details have been met shall be submitted with an application for a Code Compliance Certificate.