Weathertightness Overhaul for Central Auckland Apartment Complex

A large apartment complex in Kingsland was a classic leaky building. All inhabitants were required to vacate the building for several months while a complete reclad took place.

In addition to the lack of water-tightness of the walls and window flashings, serious volumes of water had been tracking down through the public walkways into the basement carpark and most of the balconies off each of the apartments were also leaking. The walkways and decks had originally been coated with a liquid membrane system which had obviously not stood the test of time. An additional challenge for the water-proofer would be successfully sealing every one of the dozens of supports of the existing top-mounted balustrade system which could not be removed.

Solution

The architect / weathertightness consultant specified Viking's Dec-K-ing membrane in the Stonehenge pattern for the walkways and decks due to its following credentials:

It's an all-in-one system with a grippy surface and attractive pattern
Inherent reinforcing mesh in the sheet to enhance puncture resistance and provide latitudinal strength
Heat-weldable seams for maximum water-tightness
Proven record in New Zealand for two decades
A BRANZ Appraisal to demonstrate fitness for purpose in New Zealand's high UV and tough conditions
A substantial 20 year warranty backed by Tiri Group

Additionally, only application companies who have been through Viking's stringent three-staged licensing programme are eligible to install Viking Dec-K-ing. So only quality applicators can install this system and when this training is combined with years of experience, the result is one of absolute waterproofing integrity and craftsmanship. The architect and main contractor appointed one of Viking's most experienced Dec-K-ing installers to complete the job.

Result

All stakeholders, including the Body Corporate and apartment owners who have shifted back into the complex, could not be more thrilled with the result. Since the completion of the job, the decks have performed well — even in heavy rain. The residents are very pleased with the aesthetically pleasing, watertight walkways and decks and the substantial warranty gives everyone peace of mind.

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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