AS 3740-1994

1 - AS 3740-1994 WATERPROOFING OF WET AREAS WITHIN RESIDENTIAL BUILDINGS
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE
5 - 2 APPLICATION
5 - 3 REFERENCED DOCUMENTS
5 - 4 DEFINITIONS
5 - 4.1 Approved
5 - 4.2 Drainage flange
5 - 4.3 Elastomeric material
6 - 4.4 Enclosed shower
6 - 4.5 Floor angle
6 - 4.6 Floor waste
6 - 4.7 Hob
6 - 4.8 Leak control system
6 - 4.9 Membrane
6 - 4.10 Perimeter flashing angle
6 - 4.11 Prefinished wall panels
6 - 4.12 Regulatory authority
6 - 4.13 Shower base
6 - 4.14 Shower screen
6 - 4.15 Shower tray
6 - 4.16 Shower waste
6 - 4.17 Vertical flashing angles
6 - 4.18 Vessel
6 - 4.19 Wet area
6 - 5 CLASSIFICATION OF SHOWER TRAYS
7 - 6 CATEGORY OF RISK
7 - 6.1 General
7 - 6.2 Category 1 areas
7 - 6.3 Category 2 areas
7 - 7 PERFORMANCE REQUIREMENTS
9 - 8 DEEMED-TO-COMPLY DETAILS
9 - 9 CONSTRUCTION
9 - 9.1 General
10 - 9.2 Shower bases
10 - 9.3 Shower trays
10 - 9.3.1 General
10 - 9.3.2 In situ trays
11 - 9.3.3 External trays
11 - 9.3.3.1 External prefabricated trays
11 - 9.3.3.2 External in situ trays
11 - 9.3.3.3 External sheet tray
11 - 9.3.4 Internal in situ trays
11 - 9.3.5 Hobless showers
11 - 9.3.6 Shower-over-bath enclosure
11 - 9.4 Flashing angles and corner reinforcing tape
11 - 9.4.1 Perimeter flashing angles
12 - 9.4.2 Vertical flashing angles
12 - 9.4.2.1 External vertical flashing angles
13 - 9.4.2.2 Internal vertical flashing angles
13 - 9.4.3 Corner reinforcing tape
13 - 9.5 Corner joints in tiling
15 - 9.6 Decorative thermosetting laminated sheets
15 - 9.6.1 Fixing
15 - 9.6.2 Joints
15 - 9.7 Proprietary products
15 - 9.8 Floor wastes
15 - 10 MATERIALS
15 - 10.1 General
15 - 10.2 Adhesives
15 - 10.3 Cement render and grouting
15 - 10.4 Angles
15 - 10.5 Fibre cement sheets
15 - 10.6 Decorated thermosetting laminated sheet
15 - 10.7 Sealants
16 - 10.8 Sheet fastenings
16 - 10.9 Tiles
16 - 10.10 Water-resistant plasterboard
17 - APPENDIX A - DESIGN CONSIDERATIONS IN WET-AREA WATERPROOFING
17 - A1 SCOPE
17 - A2 LEAKAGE THROUGH FINISHES
17 - A2.1 General
17 - A2.2 Types of movement and causes
17 - A2.2.1 General
17 - A2.2.2 Movement from shrinkage
17 - A2.3 Natural drainage
17 - A3 MOVEMENT AND WATER PROOFING
17 - A3.1 Restricting frame movement
17 - A3.2 Wall linings under tiles
17 - A3.3 Impervious-sheet wall linings
18 - A3.4 Floors
18 - A3.4.1 General
18 - A3.4.2 Types of moisture barrier
18 - A3.4.3 General requirements of barriers
18 - A3.4.4 In situ barriers (properties and installation)
18 - A3.4.5 Set downs
18 - A3.4.6 Showers with hobs
18 - A3.4.7 Tiles within shower base
23 - APPENDIX B - GENERAL LAYOUTS
26 - APPENDIX C - CONSTRUCTION DETAILS

Specifies design requirements and materials for the waterproofing of shower areas and areas subject to infrequent wetting or splashing within residential buildings. Construction techniques for various wall/floor combinations that are deemed to comply with the requirements of this Standard are included in an Appendix.

This Standard sets out requirements for the waterproofing of wet areas within residential buildings. Where appropriate, construction materials and methods are specified.NOTES:1 Additional information and discussion on the recommended materials and techniques is provided in Appendix A.2 Figures illustrating terminology used and general layouts of shower enclosures are provided in Appendix B.3 Construction details for various floor/wall combinations that will satisfy these waterproofing requirements are provided in Appendix C.

First published as AS 3740-1989.
Second edition 1994.