AS/NZS 2904:1995 Damp-proof courses and flashings
Standards Australia/Standards New Zealand
Supersedes: AS 2904-1986 Damp-proof courses and flashings
Draft Designation: DR 94170 (in part)This Standard incorporates Amendment No. 1 (March 1995) and Amendment No 2 (February 2013). The changes required by the Amendment are indicated in the text by a marginal bar and amendment number against the clause, note, table, figure or part thereof affected.
This Standard does not cover mortar-type damp-proof courses as these are covered in AS 3700, Masonry structures, and AS 4773.2, Masonry in small buildings, Part 2: Construction.
The Standard includes performance requirements and a list of commonly used materials deemed to be satisfactory. The Committee examined the range of damp-proof courses and flashings in common use. Since these materials have proved to be quite satisfactory for a long period of time, it seemed unreasonable that they should have to demonstrate full compliance with a set of performance requirements aimed primarily at new products.
There are five groups of materials in current use, viz. metals, bitumen-coated metals, polyethylene coated metals, bitumen-impregnated materials, and polyethylene. These are fully specified in this Standard together with relevant tests and any limitations on their use.
The performance requirements are based on the appropriate test methods from previous Standards, updated and metricated. An impact test originally used for polyethylene has been applied to all damp-proof courses and flashings to provide a suitable level of robustness.
The ‘deemed to satisfy’ provisions are specific to the materials detailed in Clause 7 of the Standard. Products not complying with these minimum manufacturing requirements would require full assessment of performance in the same way as any new material or combination of materials. New materials or combinations may require additional criteria of acceptance and this would be considered in future editions of the Standard.
The objective of this Standard is to provide manufacturers and users of damp-proof courses and flashings with specifications covering the manufacturer and performance of damp-proof courses and flashings for use in building applications.
Originated in Australia as part of SAA Int. 326-1953 and SAA Int. 327-1953. Previous edition AS 2904-1986. Jointly revised in part and designated AS/NZS 2904:1995. Reissued incorporating Amendment No. 1 (March 1998). Reissued incorporating Amendment No. 2 (February 2013).
This Standard specifies requirements for damp-proof course and flashing materials of the sheet membrane, strip and collar type for use in building construction.
NOTES:
1 For mortar-type damp-proof courses, see AS 3700 and AS 4773.2. This Standard does not include vapour barriers.
2 Alternative methods for determining compliance with this Standard are given in Appendix A.
Contents:
1: Scope
2: New Materials
3: Referenced Documents
4: Definitions
5: General Requirements
6: Performance Requirements
7: Materials Deemed To Be Satisfactory
8: Packing And Marking
Appendix A: Means For Demonstrating Compliance With This Standard
Appendix B: Roll Labelling
Dampproof Courses And Flashings.
BD-029
Aluminium Development Council (Australia); Auckland Manufacturers Association; Australian Chamber of Commerce and Industry; Australian Institute of Building Surveyors; Australian Institute of Building; Clay brick and Paver Institute (Australia); Concrete Masonry Association of Australia; Department of Local Government and Co-operatives (Australia); Master Plumbers and Mechanical Services Association of Victoria; Metal DPC Manufacturers (Australia); Plastics and Chemicals Industry Association (Australia); Royal Australian Institute of Architects.
