Dampfix Gold Interior Waterproofing Membrane has been appraised for use as a waterproofing membrane for internal wet areas of buildings, within the following scope:

• on floor substrates of concrete, flooring grade particleboard, plywood, fibre cement compressed sheet and fibre cement sheet tile underlay, and on wall substrates of concrete, concrete masonry, wet area fibre cement sheet lining systems and wet area plasterboard lining systems; and,
• when protected from physical damage by ceramic or stone tile finishes; and,
• where floors are designed and constructed such that deflections do not exceed 1/360th of the span.

Bostik Dampfix Gold may be used on the following substrates:

• Plywood
• Fibre cement compressed sheet / fibre cement sheet tile underlay
• Particleboard
• Concrete and concrete masonry
• Wet area wall linings

See BRANZ Appraisal for full substrate requirements.

• 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.
• All materials must be stored inside, up off concrete floors, in dry conditions, out of direct sunlight and freezing conditions. The membrane products have a shelf life of 12 months from date of manufacture in the original unopened packaging. Once opened, the products must be used within 3 months.
• For exterior applications see Dampfix Gold Exterior Waterproofing Membrane (BRANZ Appraisal 744).

Outside the scope of BRANZ Appraisal 745:

• The use of Dampfix Gold Interior Waterproofing Membrane on concrete slabs where hydrostatic or vapour pressure is present is outside the scope of this Appraisal.
• The ceramic or stone tile finishes are outside the scope of the Appraisal. Overlaying tiling systems must comply with Guide to the Installation of Ceramic Tiles — AS3958.1
• 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 Interior Waterproofing Membrane, if designed, used, installed and maintained in accordance with the statements and conditions of BRANZ Appraisal 745, will meet the following provisions of the NZBC:

• Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years and B2.3.2. Dampfix Gold Interior Waterproofing Membrane meets this requirement.
• Clause E3 INTERNAL MOISTURE: Performance E3.3.6. Interior wet area floors and walls incorporating Dampfix Gold Interior Waterproofing Membrane meet this requirement.
• Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Dampfix Gold Interior Waterproofing Membrane meets this requirement and will not present a health hazard to people.

See BRANZ Appraisal 745 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.