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Casali Dermabit Extra APAO
Description

Casali Dermabit Extra APAO Italian torch-on roofing membrane is made of pure bitumen with the highest quality techno-polymers. This is especially designed for membrane roofs and decking subject to high thermal stress caused by the harsh NZ sun (-25° to +150°), exceptional workability, and a high architectural finish.

Key Features
  • Especially designed for large surfaces subject to high thermal stress due to direct sunlight or high temperature build up
  • Hot rolled manufacturing process minimises the loss of mineral chip
  • Can be installed to gutters in 10 meter lengths and is suitable for any size roof
  • Guaranteed by more than 25 years in the field
  • A certified solution
  • Versatile and reliable at any latitude
  • Extensive thermal operating range (-20°C to +150°C )
  • Fast and easy to apply
  • Excellent resistance to ageing
Categories / Ranges
Membrane Roofing Casali
Scope of Use

Casali Dermabit Roof and Deck Membrane Systems have been appraised as roof and deck waterproofing membranes on buildings within the following scope:

  • The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with respect to building height and maximum floor plan areas; and,
  • With building structures designed and constructed to meet the requirements of the NZBC; and,
  • With roof and deck supporting structures of timber framing with substrates of plywood or fibre cement sheet; and,
  • With substrates of suspended concrete slabs; and,
  • Situated in NZS 3604 Wind Zones, up to, and including Extra High; and,
  • With decks that have a maximum area of 40m².

Casali Dermabit Roof and Deck Membrane Systems have also been appraised for use as roof and deck waterproofing membranes on specifically designed buildings within the following scope:

  • With building structures designed and constructed to comply with the NZBC; and,
  • With roof and deck supporting structures of timber framing with substrates of plywood or fibre cement sheet; and,
  • With substrates of suspended concrete slab; and,
  • Subjected to maximum wind pressures; and,
  • With the weathertightness design of all junctions being the subject of specific design by the designer. Note: The design of these junctions has not been appraised by BRANZ and is outside the scope of the BRANZ Appraisal.
Limitations on Use

Roofs and decks waterproofed with Casali Dermabit Roof and Deck Membrane Systems must be designed and constructed in accordance with the following limitations:

  • Nominally flat, curved or pitched roofs and decks constructed to drain water to gutters and drainage outlets complying with the NZBC; and,
  • Constructed to suitable falls; and,
  • With no integral roof gardens; and,
  • No steps in level within the deck area, except into gutters; and,
  • No downpipes direct discharge to decks; and,
  • With membranes protected from physical damage or UV light by ceramic or stone tile finishes or timber, resting on approved pedestal supports.

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 BRANZ Appraisal.

Statement of Building Code Compliance

In the opinion of BRANZ, Casali Dermabit Roof and Deck Membrane Systems, if designed, used, installed and maintained in accordance with the statements and conditions of Appraisal No. 647 (2009), will meet or contribute to meeting the following provisions of the NZ Building Code:

  • Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. Casali Dermabit Roof and Deck Membrane Systems meet this requirement.
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. Casali Dermabit Roof and Deck Membrane Systems meets these requirements.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Casali Dermabit Roof and Deck Membrane Systems meet this requirement and will not present a health hazard to people.

Casali Dermabit Roof and Deck Membrane Systems have been appraised as an Alternative Solution in terms of New Zealand Building Code compliance. The membranes are an alternative to the membranes specified in NZBC Acceptable Solution E2/AS1, and an Alternative Solution subject to specific design for other buildings not covered within E2/AS1.

B2 Durability compliant
Durability
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
Documents
CAD/PDF (link to page on supplier website)
Data Sheet
Independent Appraisal (BRANZ)
Pre-Installation Checklist
Colour Range
Installation Details
Clay-Cement Installation Detail
Corrugated Sheet Installation Detail

Allco Waterproofing Solutions specialise in quality waterproofing products and seismic joints supplying Volclay, Casali, Hydrotech and Emseal.

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