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Dec-K-ing (PVC) Waterproofing Membrane

Dec-K-ing is a single-ply, trafficable, waterproofing PVC sheet membrane system for deck surfaces (suitable for decks above living areas). It is an aesthetic, all-inclusive finished waterproofing solution. The sheets are heat-welded with 25mm lapped seams.

Dec-K-ing is well-suited to areas requiring traction underfoot (due to the embossed, slip-resistant surface) with a robust finish. Dec-K-ing is suitable for inland, coastal, residential (roof decks, patios, pool decks, multi-unit apartments) and commercial (surf clubs, schools, playgrounds) areas, and is also great for ramps and walkways.

Key Features
  • Surface provides underfoot comfort, and has a propensity to take a lot longer to heat-up than other deck surfaces;
  • Embossed surface offers wear resistance to allow for the movement of deckware such as BBQs, pot plants and tables;
  • Polyester-reinforcing mesh scrim inherent throughout the membrane provides puncture resistance; made to withstand the deck surfaces of pleasure craft boats where fishing rods and anchors are present;
  • Directional stability: changes in temperature cause deck substrates (especially plywood) to contract and expand. This has caused splitting and leaking in other membranes. Dec-K-ing's flexibility, reinforcing mesh scrim and heat-weldable technology avoids this;
  • Available in six colours: Landau Grey, Sandy Pearl, Stonehenge, Sand Pebble, Hastings and Sandy Granite;
  • Thickness: 1.5mm; roll width: 1.83m (Sandy Granite = 1.78m); roll length: cut to any length up to 123m;
  • UV resistant;
  • Comes as a finished waterproofing solution – does not require painting, nor tiles to be adhered over the top.
NZ-Owned Business
NZ-Owned Business
Scope of Use

Viking Dec-K-ing PVC Waterproofing Membrane has been appraised for use as a waterproofing membrane for buildings within the following scope:

  • on pedestrian decks and balconies; and,
  • scope limitations of NZBC Acceptable Solution E2/AS1, paragraph 1.1; and,
  • with timber supporting structures designed and constructed in accordance with the NZBC; and,
  • with substrates of plywood sheet and compressed fibre cement sheet.

Viking Dec-K-ing PVC Waterproofing Membrane has also been appraised for use as a waterproofing membrane for external reinforced concrete pedestrian decks and balconies for buildings within the following scope:

  • up to 3 storeys with a maximum height from ground to eaves of 10m and with a floor plan area limited only by seismic and structural control joints; and,
  • with the reinforced concrete structure designed and constructed in accordance with the NZBC.

This appraisal is limited to pedestrian decks and balconies within the following scope:

  • constructed to suitable falls (refer paragraphs 12.1 - 12.9 of the Viking Dec-K-ing BRANZ Appraisal); and,
  • with no steps within the deck level, no integral roof gardens and no down pipe discharging directly onto the deck.

The design and construction of the substrate and movement and control joints are specific to each building, and are therefore the responsibility of the building designer and building contractor, and are outside the scope of this appraisal. 

Limitations on Use
  • The Viking Dec-K-ing PVC Waterproofing Membrane can only be installed by Viking Licensed installers.
  • Can be installed over treated flooring grade plywood (min 17mm thick), concrete and fibre cement.
Statement of Building Code Compliance
  • Clause B1 STRUCTURE: Performance B1.3.1 and B1.3.2. Viking Dec-K-ing PVC Waterproofing Membrane meets this requirement.
  • Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. Viking Dec-K-ing PVC Waterproofing Membrane meets this requirement. See paragraph 9.1 of the Viking Dec-K-ing BRANZ Appraisal.
  • Clause D1 ACCESS ROUTES: Performance D1.3.3 (d). Viking Dec-K-ing PVC Waterproofing Membrane meets this requirement. See paragraph 7.6 of the Viking Dec-K-ing BRANZ Appraisal.
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. Decks and balconies incorporating Viking Dec-K-ing PVC Waterproofing Membrane meet these requirements. See paragraphs 12.1 - 12.8 of the Viking Dec-K-ing BRANZ Appraisal.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking Dec-K-ing PVC Waterproofing Membrane meets this requirement and will not present a health hazard to people.
Other Performance Attributes
  • BRANZ Appraised (no. 411, 2011);
  • Backed by a 20-year product warranty, and specific projects may be eligible for Viking's Full System Warranty, which covers the product and installation warranties in one document;
  • Dec-K-ing is low maintenance: it offers some mildew resistance and requires minimal cleaning.
B1 Structure compliant
B2 Durability compliant
D1 Access Routes compliant
Access Routes
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
Product Assurance
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 - Dec-K-ing Enjoys the View
Case Study - Deck Renovation
Case Study - Weathertightness Overhaul for Leaky Central Auckland Apartment Complex
Find an approved installer
Membrane Protection Sheet
Product Page on Supplier Website
Viking Roofspec Company Profile
CAD/PDF Details
Architect Details (Full Set)
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Best Design principles for Roof / Deck

No Gutters

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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