Dec-K-ing Promotes Sea Views

Serving as a wonderful viewing platform overlooking the Pacific Ocean from six floors up, the roof of an upmarket Mount Maunganui apartment building was beginning to look tired. The butyl rubber membrane was beginning to oxidise — a condition more commonly known as chalking-off. The old butyl was struggling with the intense UV and heat (being black), putting excessive pressure on the building interior’s air-conditioning requirements, and therefore energy costs of the building.

The building owners installed some artificial grass as a ‘quick fix’, but despite the marginal success, they knew they had to replace the roofing membrane to keep with the quality and location of the building. The solution was found with Viking’s BRANZ Appraised Dec-K-ing system.

Viking Dec-K-ing is a hard-wearing waterproofing membrane that provides the ultimate underfoot finish and waterproofing for decks above living areas. It 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’s now installed on homes and buildings all over the world.

Installed by a Viking Approved Applicator, the 500m² installation wasn’t simple. The extremely uneven concrete substrate needed to be ground back to a smooth finish prior to installing the Dec-K-ing membrane as the rough texture would have been visible through the surface. Additionally, once the substrate had been diamond-ground it needed to be coated with a hydropoxy surface sealer. Being wintertime, this prevented the need for down-time to dry out the substrate after each rainfall during the installation period.

The building owners were delighted with their wonderful new roof-deck, allowing them to entertain guests and view the ocean on an attractive, robust, but more importantly, watertight membrane.

Dec-K-ing (PVC) Waterproofing Membrane

Viking Roofspec

View Product

Viking Dec-K-ing is a hard-wearing, aesthetic waterproofing membrane, providing the ultimate underfoot finish and waterproofing for decks above living areas.

NZ-Owned Business

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.

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.

BRANZ Appraised

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