Casali Dermabit Extra: Durable, Torch-on Deck Waterproofing

Casali Dermabit Extra allows the use of suspended tiles or timber decking, utilising the pedestal or jacks for the suspension of the upper pedestrian surface.

As a two layer, torch-on waterproofing system Casali is very well suited to construction methodology where the deck can be waterproofed by the first layer. The second layer is applied later when there is less construction foot traffic which minimizes risk of damage to the membrane. This is especially useful in multi-level building projects.

Casali Dermabit Extra contains optimal, polymer bitumen compound which promotes consistent adhesion of the membrane to concrete and plywood timber substrates. The high-gram reinforcement (triple layer) strengthened by glass fibre ensures resistance to mechanical load and provides superior stability and flexibility, and exceptional waterproofing on plywood substrates.

Water is not contaminated by Casali roof and deck membrane systems as it allows for the collection of water for water recycling or supply to drinking water sterilisation systems.

Casali Dermabit Extra is Branz Appraised, BBA (approved British Board of Agreement) and is an Auckland City Council approved deck waterproofing system.

Casali deck and roofing membranes are installed by a nationwide network of approved applicators.

Casali Torch On

Allco Waterproofing Solutions

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Casali is an Italian torch-on roofing membrane made of pure bitumen with the highest quality techno-polymers.

Casali 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; or,
the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regard to building height and floor plan area when subject to specific structural design; and,
with substrates of plywood, fibre cement compressed sheet or suspended concrete slab; and,
with minimum falls for plywood roofs of 1:30, concrete roofs of 1:60 and decks of 1:40; and,
with deck size limited to 40m² and,
situated in NZS 3604 Wind Zones up to, and including, Extra High.
situated in specific design wind pressures up to a maximum design differential Ultimate Limit
State (ULS) of 6 kPa with the weathertightness detailing subject to specific design.

Casali 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.

In the opinion of BRANZ, Casali Dermabit/Dermafil Roof and Deck Membrane Systems, if designed, used, installed and maintained in accordance with the statements and conditions of this Appraisal, will meet or contribute to meeting the following provisions of the NZBC:

Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years and B2.3.2. Casali Dermabit/Dermafil Roof and Deck Membrane Systems meet this requirement. See Paragraph 10.1.
Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. Casali Dermabit/Dermafil Roof and Deck Membrane Systems meets these requirements. See Paragraphs 13.1–13.9.
Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Casali Dermabit/Dermafil Roof and Deck Membrane Systems meet this requirement.

Casali Dermabit/Dermafil 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.

BRANZ Appraised

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