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Appraisal number: 670 (2017)

Date issued: 17 Jan 2018

SikaRoof® MTC Roof and Deck Membrane

Description

SikaRoof® MTC Roof and Deck Membrane is a UV-resistant, aliphatic polyurethane-based, liquid-applied waterproofing membrane for roofs and decks.

Scope

SikaRoof® MTC Roof and Deck Membrane has been appraised as a roof and deck waterproofing membrane on buildings within the following scope:

  • The scope limitations of NZBC Acceptable Solution E2/AS1 paragraph 1.1.
  • The scope limitations of NZBC Acceptable Solution E2/AS1 paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design.
  • With substrates of plywood or suspended concrete slab.
  • With minimum falls for roofs of 1:30 and decks of 1:40.
  • With deck size limited to 40 m².
  • Situated in NZS 3604 wind zones up to and including extra high.

SikaRoof® MTC Roof and Deck Membrane has also been appraised as a roof and deck waterproofing membrane on buildings within the following scope:

  • Subject to specific structural and weathertightness design.
  • With substrates of plywood or suspended concrete slab.
  • Situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 6 kPa.
  • With the weathertightness design of junctions for each specific structure being the responsibility of the building designer.

Roofs and decks waterproofed with SikaRoof® MTC Roof and Deck Membrane must be designed and constructed in accordance with the following limitations:

  • Decks and nominally flat or pitched roofs constructed to drain water to gutters and drainage outlets complying with the NZBC.
  • With no steps within the deck level, no integral roof gardens and no downpipe direct discharge to the deck.
  • With the deck membranes continually protected from physical damage by a pedestal protection system.

The design and construction of the substrate and movement and control joints is specific to each building and therefore is the responsibility of the building designer and building contractor and is outside the scope of the Appraisal.

The membrane must be installed by trained applicators approved by Sika (NZ) Ltd.

Technical literature

  • Roofing - SikaRoof® MTC Systems - Roofing Solutions with Sikalastic Liquid Membranes Designer Selection Guide 3006.14 
  • Technical Drawings, SikaRoof MTC-22 Standard Details in accordance with NZBC Clause E2, Version 10/2017/Version 3.1/Sika APAC/Jon Summers, 2017
  • Technical Drawings No. 100-108 Sikaroof MTC Cold bonding details v0814, 14/08/14

Consenting instructions

Always refer to the Appraisal in full and the technical literature.

Appraisal holder

Sika (NZ) Ltd
Address:
Phone: 0800 SIKA NZ
Email:

Marketer details

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