Sleek on the Second Floor

An Auckland primary school was required to upgrade the access to its second-floor classrooms. This involved the removal of all decking, framing, stair stringers, and landings. To avoid overcomplicating the redesign and construction, it was decided to use the existing structure. This meant that a floating deck couldn’t be incorporated due to lack of height below the door threshold, leaving membrane as the only option. Being a high trafficable area used by children, it was critical that the deck material was durable, grippy, relatively cool underfoot and aesthetically sympathetic with the surrounding buildings.

Having specified Viking Dec-K-ing previously, DLM Architects knew the system was the perfect solution for the classroom accessway at Kohia Terrace School.

After seeking technical assistance from the Viking team around post and balustrade detailing and how to dress the membrane around other junctions, the project was handed over to the construction team and Viking Approved Applicator for membrane installation.

Viking Dec-K-ing requires a unique and specific method of preparation for plywood substrates prior to membrane installation. It’s also imperative the substrate is inspected prior to membrane installation, ticking all the boxes of Viking’s comprehensive substrate checklist. This ensures a smooth, flush finish of the substrate for the membrane to adhere to, preventing the membrane from potentially protruding upwards above the plywood joins during seasonal building movement.

Once the substrate was signed off, the doors and cladding were removed to dress the membrane up and under the framing and walls, as per Viking Roofspec’s specification. Additionally, as with any patterned membrane, it was essential that the licensed installers took extra care pattern matching; making the laps as unnoticeable as possible.

All stakeholders could not be more thrilled with the result. The installation of the new deck went smoothly, and the workmanship of the Approved Applicator is of the highest standard. The new walkways to the classrooms are watertight, child-friendly, aesthetically pleasing, and are already standing up to the scuffs and scrapes from the odd thrown school bag and cricket bat.

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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