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Book 2 - Guide to External Waterproofing - Balcony Decks

Master Builders NSW

Version:  2017 Revised Edition.  (Current)
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A waterproofing membrane system comprises a combination of compatible components. When combined with appropriately detailed flashings and drainage, the combination will form a watertight barrier that protects building elements from water penetration and consequential damage.

The objective of the Master Builders Association Waterproofing Technical Committee “Guides to Waterproofing” series of books is to document current industry high quality building practice with the intent of reducing the high incidence of waterproofing failures.

The Guide to External Area Waterproofing (Balcony Decks) is the second book in a series, that addresses waterproofing in buildings.

The minimum performance requirements for waterproofing are set out in the National Construction Code (NCC)/Building Code of Australia (BCA). As of the time of producing this guide for high quality waterproofing there was no Australian Standard for external waterproofing, however with the two current standards this guide still exceeds the minimum requirements from AS4654.1 “External Waterproofing Membrane Systems Part 1 - Materials” and AS4654.2 “External Waterproofing Membranes Part 2 Design and Installation”.

Clause 2.2 of the NCC/BCA defines the objectives in relation to damp and weatherproofing. Clause 2.2 states that the objective is to (a) safeguard occupants from illness or injury and protect the building from damage caused by- i) surface water, and ii) external moisture entering a building; and iii) the accumulation of internal moisture in a building; and discharge of swimming pool wastewater; and (b) protect other property from damage caused by – i) redirected surface water, and ii) the discharge of swimming pool wastewater.


Chapter 1: Waterproofing System Considerations
Chapter 2: Exposure Category Classifications
Chapter 3: Balcony And Deck Design
Chapter 4: Substrates
Chapter 5: Drainage Connections
Chapter 6: Door And Window Openings
Chapter 7: Perimeter Termination
Chapter 8: Cavity Flashings
Chapter 9: Efflorescence Control
Chapter 10: Waterproofing Membranes
Chapter 11: Bond Breakers And Fillets
Chapter 12: Movement Joints
Chapter 13: Service Penetrations
Chapter 14: Balustrades
Chapter 15: Skylights
Chapter 16: Membrane Protection And Overlaying Finish
Chapter 17: Plan And Prepare
Chapter 18: Waterproofing Process Sequence
Chapter 19: Application Of Waterproofing Systems
Chapter 20: Waterproofing Failures
Chapter 21: Checklists, Inspection And Quoting Sheets
Chapter 22: Glossary Of Terms
Appendix 1: Tables And Illustrations


Waterproofing Council Technical Committee

Paul Ratcliff  - Chair / Building Consultant
Michael Anderson - Builder / Consultant
Eric Byrne - Consultant
Colin Cass - Tiling Consultant
Bob Hearn  - Builder / Consultant
David Viles - Graphics Content
Bill Straw - Consultant / Trainer
Michael Herder - Supplier

Master Builders Association of New South Wales 2021
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Book 2 - Guide to External Waterproofing - Balcony Decks 2017 cover