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Dec-K-ing (PVC) Waterproofing Membrane

Viking Dec-K-ing is a hard-wearing, aesthetic waterproofing membrane, providing the ultimate underfoot finish and waterproofing for decks above living areas. Viking Dec-K-ing is a PVC membrane reinforced with a polyester mesh scrim inherent in the sheet to provide latitudinal strength and puncture resistance.

Originally designed in the 1980s for the marine industry (boat decks), its robust nature and heat-weldable seam technology deemed it an attractive option for the construction sector to the point that it is now installed on homes and buildings all over the world.

Despite Dec-k-ing being installed mostly in residential situations, it is increasingly being specified for multi-level apartment complexes; retirement and nursing villages and institutional facilities such as schools, requiring underfoot grip in areas such as ramps and walkways.

When the seasons change, building structures and deck substrates (especially plywood) tend to contract and expand. This movement has caused splitting in other membrane types. This is avoided due to Viking Dec-K-ing's flexibility; its inherent reinforcing mesh scrim and heat-weldable seam technology.

It has been successfully proven in New Zealand over the last 20 years and is the perfect all-in-one waterproofing; aesthetic and grippy membrane solution for decks and walkways.

Key Features
  • Six colour options: Sandy Granite, Sand Pebble, Sandy Landau Grey, Sandy Pearl, Stonehenge and Hastings
  • Heat wieldable
  • UV resistance
  • Heat reflectivity
  • Style/colour options
  • Anti-slip (embossed) surface
  • Mildew resistance
  • Low maintenance
  • Puncture resistance
  • Wear resistance
  • Proprietary heat-weldable accessories
  • Installed by a Viking Approved Applicator
  • 20-year product warranty
  • Full System Warranty Option: 20-years
  • BRANZ Appraised ( Appraisal No. 411)
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
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
Dec-K-ing Details Full Set .DWG
Dec-K-ing Details Full Set .PDF

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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