Leaking Deck Repaired with Viking Dec-King Waterproofing Membrane

How did Viking Dec-K-ing provide the solution for a deck that was coated in a leaky, liquid-applied membrane system?

The Challenge

A liquid waterproofing membrane that had been applied to the deck of a Stanmore Bay home was leaking into the living space under an area of the deck — just one year after installation. After repairs were undertaken by the membrane installers (as the membrane had a long time left on its warranty), leaking occurred again 18 months later, leading the home owners to seek a watertight solution for the long term.

The Solution

When first attempting to waterproof the deck several years earlier, Viking Dec-K-ing was originally specified. The installer however had convinced the home owners to change to his membrane of choice — the liquid membrane.

The homeowners decided that they would pursue the system that was initially specified in Viking Dec-K-ing. The 'Sand Pebble' colour was chosen and not only did the home owners love the colour, but it was a good fit with the exterior cladding and the natural environment, especially Stanmore Bay in the background.

As part of taking care of the detail, great attention was paid to preparing the substrate. All remnants of the existing membrane were removed, and a hydro-poxy sealant was applied as a preventative measure against any moisture that had potentially found its way into the concrete substrate after years of ingress — which could possibly compromise the adhesion of the new membrane.

Once the substrate preparation was completed, the Dec-K-ing vinyl sheet membrane was installed. The fact that Dec-K-ing is a heat-weldable vinyl sheet system and is only installed by Viking Approved Applicators (trained to a high-standard in Dec-K-ing installation) was key in the homeowners deciding on Dec-K-ing; all supported by Dec-K-ing's good track record of water-tightness.

The Result

After the persistent issues experienced with the liquid membrane solution, the home owners couldn't have been happier with their new waterproof deck. Not only was it waterproof, it now also looked pristine and provided a smooth, slip-resistant finish underfoot; creating a great platform to take in the views — something which proved difficult with the previous membrane. The owners' confidence in their new Dec-K-ing system was further solidified in the knowledge it was backed by a 20-year product warranty.

Dec-K-ing (PVC) Waterproofing Membrane

Viking Roofspec

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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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