Dampfix Gold Exterior Waterproofing Membrane has been appraised as a deck and balcony waterproofing membrane 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 engineering design; and,
• with substrates of plywood, fibre cement compressed sheet, or suspended concrete slab; and,
• with minimum falls for decks and balconies of 1:40; and,
• with deck and balcony size limited to 40 m²; and,
• situated in NZS 3604 Wind Zones up to, and including, Extra High.

• Decks and balconies must be designed and constructed in accordance with the following limitations:
  • with the membrane continually protected from exposure to ultraviolet (UV) light and from physical damage by ceramic or stone tile finishes; and,
  • with no steps within the deck level and no down pipes discharging directly onto the deck.
• The membrane must be installed by trained applicators, approved by Bostik New Zealand Ltd.
• Not recommended as a membrane system in immersed applications (such as pools or spas).
• Movement and control joints in the substrate must be carried through the membrane and tile finish.
• For interior applications see Dampfix Gold Interior Waterproofing Membrane (BRANZ Appraisal 745).

Outside the scope of BRANZ Appraisal 744:

• The ceramic or stone tile finishes are outside the scope of the Appraisal. 
• The design and construction of the substrate and movement and control joints is specific to each building, and is therefore the responsibility of the building designer and building contractor and is outside the scope of the Appraisal.

Dampfix Gold Exterior Waterproofing Membrane, if designed, used, installed and maintained in accordance with the statements and conditions of this Appraisal, will meet the following provisions of the NZBC:

• Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years and B2.3.2. Dampfix Gold Exterior Waterproofing Membrane meets these requirements.
• Clause E2 EXTERNAL MOISTURE: Performance E2.3.1 and E2.3.2. Decks and balconies incorporating Dampfix Gold Exterior Waterproofing Membrane meet these requirements.
• Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Dampfix Gold Exterior Waterproofing Membrane meets this requirement.

See BRANZ Appraisal 744 for full information.

Dampfix Gold has been used globally since 2010 and in New Zealand since 2012. Since then it has been used on thousands of projects across the country.

• 144 grams per Litre as VOC content per material
• Class 3, high elasticity
• Will not re-emulsify after curing
• Does not embrittle with age

No maintenance of the membrane will be required provided significant substrate movement does not occur and the tile finish remains intact. Regular checks must be made of the tiled areas to ensure they are sound and will not allow moisture to penetrate. Any cracks or damage must be repaired immediately by repairing the tiles, grout and sealant.