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Enviroclad FBS (Fleece-Backed System) Membrane

 Viking Enviroclad FBS (fleece-backed system) is Enviroclad with a 'fluffy' polyester layer that has been factory-laminated to the underside. Enviroclad FBS is one of the best re-roofing solutions for overlaying over old bitumen or uneven substrates such as rough concrete. A specialised two-part polyurethance foam adhesive is used to securely bond the membrane to the old roof surface and the fleeced underside forgives its roughness; creating a smoother surface than before. An unsightly, rough substrate would otherwise show more imperfections through the surface of any non-fleece-backed membrane.

Overlaying an existing substrate achieves cost savings through no reconstruction or dumping of the roof (also good for the environment) and avoids exposing the interior of the building.

Enviroclad FBS is suitable for low-slope and pitched roofs, gutters and parapets, pondliners, balconies, decks and roof gardens of commercial and residential buildings.

Key Features
  • Colour options: Grey and White
  • Thousands of installations in NZ and the Pacific Islands
  • Installed only by Viking Licensed Applicators
  • Formulated to suit a wide range of climatic conditions
  • UV resistant
  • Water potability certified
  • Heat-reflectivity
  • Heat-weldable
  • Custom-made accessories
  • Wide rolls (up to 3.66m) — fewer seams
  • Long rolls (30.4m) — fewer seams
  • 20-year product warranty
  • CodeMark Certified (Certificate No. 30058)
Energy Star
Energy Star
NZ-Owned Business
NZ-Owned Business
Scope of Use

Viking Enviroclad FBS Membrane System is suitable for use 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 FBS Membrane System is also suitable 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

Viking Enviroclad FBS must be installed by Viking Roofspec Licensed and Trained installers.

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 FBS Membrane System meets this requirement.
  • Clause B2 DURABILITY: Performance B2.3.1 (b) and B2.3.2 (a), 15 years. Viking Enviroclad FBS Membrane System meets this requirement.
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.2 and E2.3.7 (b) and (c). Viking Enviroclad FBS Membrane System meets these requirements.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Enviroclad FBS Membrane System meets this requirement and will not present a health hazard to people.
Other Performance Attributes
  • Enviroclad FBS is ENERGY STAR rated and Cool Roof Rating Council certified in the USA;
  • In New Zealand, Enviroclad FBS will contribute points to a building's Green Star Rating;
  • 100% recycling of off-cuts during its manufacturing process.
B1 Structure compliant
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
Enviroclad PTS
Material Safety Data Sheet
Membrane Protection Sheet
BRANZ Appraisal

no. 656

Maintenance Instructions
Specification Clause (Masterspec)
Find an Approved Installer
Substrate Checklist - Plywood
Substrate Checklist - Strandsarking
Substrate Checklist: Concrete
Brochure: Viking Enviroclad
Additional Information
Additional Information
Case Study - Energy Efficient Apartments
Case Study - Protecting an Historic Building
Case Study: Te Kuiti Post Office
CAD/PDF Details
Enviroclad Details Full Set
Viking Buzon Details Full Set

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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