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Enviroclad (TPO) Waterproofing Membrane

Enviroclad is a CodeMark certified, polyester fabric reinforced, thermoplastic polyolefin (TPO) waterproofing sheet membrane for flat, low-slope and pitched roofs and decks. It can be applied as a fully bonded or mechanically fixed system. Enviroclad is heat-welded, so it has strong, vulcanised seams.

Enviroclad can be used for both commercial and residential buildings. It can be applied over an existing surface as a re-roof solution. It is also suitable for gutters and parapets, pond-liners, balconies and roof gardens.

Key Features
  • Enviroclad is CodeMark certified, meaning automatic compliance with the NZBC when used as specified
  • High solar reflectivity – being available in grey and white offers high solar reflectivity that can result in energy savings
  • Officially potability certified for collecting drinking water off a roof
  • High puncture resistance (from the polyester mesh scrim)
  • Elongation properties — forgiving of building movement
  • UV resistant
  • Comes in grey or white (tan available on indent)
  • Enviroclad's rolls are wider and longer (3.0m wide x 30.4m long = 91.2m2) than traditional membranes (10m2 - 25m2), meaning fewer seams on the finished roof
  • Comes in 1.14mm and 1.52mm thicknesses, and is available cut to length. Enviroclad in grey is also available in 3.66m wide (available by full roll only)
  • Roll length: 30.4m (sold cut to length). Wider and longer rolls, meaning fewer seams on the finished roof
  • Weldable walkway rolls are available which provide further protection to the roof surface by providing extra durability and directing the flow of traffic when the roof is being inspected or serviced
  • Viking Enviroclad proprietary accessories, which range from weldable internal and external corners to pourable pockets, create a watertight finish around roof penetrations and in corners.
NZ-Owned Business
NZ-Owned Business
Scope of Use

Viking Enviroclad Roofing and Deck Membrane System has been assessed as a roof and deck waterproofing membrane on buildings within the following scope:

  • the scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, paragraph 1.1; or,
  • the scope limitations of NZBC Acceptable Solution E2/AS1, paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
  • situated in NZS 3604:2011 Wind Zones, up to, and including Extra High; and,
  • with substrates of plywood or suspended concrete slab

Viking Enviroclad Roofing and Deck Membrane System has also been assessed for use as a roof and deck waterproofing membrane on specifically designed or existing buildings within the following scope:

  • subject to specific structural and weathertightness design situated in wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.7 kPa; and,
  • with substrates of plywood or suspended concrete slab
  • with the weathertightness design of junctions for each specific structure being the responsibility of the building designer
Limitations on Use
  • The system must be installed by a Viking Roofspec Trained and Approved Installer
Statement of Building Code Compliance
  • Clause B1 STRUCTURE: Performance B1.3.1, B1.3.2 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (a), (c), (e), (h), (m) and (p) Viking Enviroclad Roofing and Deck Membrane System meets this requirement.
  • Clause B2 DURABILITY: Performance B2.3.1 (b) and B2.3.2 (a), 15 years. Viking Enviroclad Roofing and Deck Membrane System meets this requirement.
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.7 (b) and (c). Viking Enviroclad Roofing and Deck Membrane System meets these requirements.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Enviroclad Roofing and Deck Membrane System meets this requirement and will not present a health hazard to people.
In-Service History

Enviroclad has been installed on over 2,300 buildings and homes including the likes of Fonterra, Courier Post, and the Ministry of Justice buildings.

Other Performance Attributes
  • Enviroclad is backed by a 20-year product warranty and for specific projects, may be an eligible membrane for Viking's Full System Warranty, which covers the product and installation in one document;
  • BRANZ Appraised (no. 656, 2015);
  • 100% recycling of off-cuts during manufacturing process;
  • Enviroclad is 100% recyclable at the end of its usable life due to the absence of chlorinators and plasticisers;
  • Enviroclad can be installed over existing membranes meaning no dumping of the old roof.
B1 Structure compliant
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
Product Assurance
Alternative Substrate Fixing Specification (Rhinobond)
CodeMark Certificate
Enviroclad Potable Certificate
Full Product Information
Independent Appraisal (BRANZ)
Maintenance Instructions
Material Safety Data Sheet
Substrate Checklist - Concrete
Substrate Checklist - Plywood
Viking Full System Warranty
Other Literature
Case study - ASB Civic Centre, Marlborough
Case Study - Hybrid Solution for Nursing Home
Case Study - Keeping Water Out of the Bank
Case Study - Protecting Staff and Pupils
Case Study - Te Kuti Post Office
Case Study - Watertight Finish for Apartments
Case Study - Watertight Infinity Pool
Case Study: Dual System on Lifestyle Home
Find an approved installer
Membrane Protection Sheet
Product Page on Supplier Website
Reroofing Brochure
Viking Roofspec Company Profile
CAD/PDF Details
Architect Details (Full Set)
Drains Allthrough Balcony
Drains Overflows Aquaknight
Drip Edge


Dropper Outlet and Overflow


Internal Gutter


Scupper Outlet


Parapet Gutter


Parapet Gutter / Outlet / Overflow


Parapet Overflow


Barge Edge


Cavity Upstands


Chase or Face Flashing


Door Threshold


Construction Joint


Pitched Roofing Junction


Skylight Upstand


External Corner


Internal Corner






Mansard Junction


Cavity Vents


Oversized Pipe


Pipe Penetration


Plant Mounting Brackets


Pourable Pockets




Square Post


TPO Batten


Parapet Junction


For over 50 years, Viking Roofspec have supplied roofing and waterproofing materials, and combining leading-edge function with design flair to keep water out — for good.

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