E2-External-Moisture-effective-1-May-2008 E2-External-Moisture-effective-1-May-2008 下载 - 国外标准

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4.3.11	Flexible flashing tape	36
4.4	Fixings	36
4.5	Flashing requirements	36
4.5.1	Edge treatments for flashings	36
4.5.2	Metal flashing joins	36
4.6	Flashing overlaps and upstands	38
4.6.1	Overlap with roof claddings	38
5.0	Roof/Wall Junctions	40
5.1	Apron flashings	40
5.2	Gutters, barges and fascias	40
6.0	Parapets	42
6.1	Limitations	42
6.2	General	42
6.3	Capping materials	42
6.4	Metal cappings	44
6.4.1	Parapet-to-wall junctions	45
6.5	Membrane cappings	45
6.6	Integral surface cappings	45
7.0	Decks and Pergolas	48
7.1	Thresholds for decks	48
7.1.1	Slatted decks	48
7.1.2	Enclosed decks	48
7.2	Attachment to building structure	48
7.2.1	Slatted timber decks to walls	48
7.2.2	Pergolas	48
7.3	Level threshold	50
7.3.1	Enclosed decks	50
7.3.2	Ground floor level access	50
7.4	Enclosed balustrades	53
7.4.1	Deck drainage	53
7.4.2	Balustrade-to-wall junctions	53
7.4.3	Balustrade-to-deck floor junction	53
7.4.4	Metal cappings	53
7.4.5	Stanchions	54
8.0	Roof Claddings	55
8.1	General	55
8.1.1	Weathertightness	55

8.1.2	Limitations	55
8.1.3	Maintenance	55
8.1.4	Fixings	55
8.1.5	Underlays	55
8.1.6	Gutters	56
8.1.7	Roof penetrations	57
8.2	Masonry Tiles	59
8.2.1	Materials	59
8.2.2	General	59
8.2.3	Installation	59
8.2.4	Flashings and fixings	59
8.2.5	Anti-ponding boards	59
8.2.6	Details and flashings	59
8.2.7	Penetrations	62
8.3	Pressed Metal Tiles	64
8.3.1	Limitations	64
8.3.2	Installation	64
8.3.3	Tiles	64
8.3.4	Metal substrate	64
8.3.5	Roof pitch	64
8.3.6	Underlay	65
8.3.7	Fixings	65
8.3.8	Flashings	65
8.3.9	Gutters, barges and fascias	68
8.3.10	Roof penetrations	68
8.4	Profiled Metal Roof Cladding	69
8.4.1	Limitations	69
8.4.2	General	69
8.4.3	Materials	69
8.4.4	Profiles	70
8.4.5	Roof pitch	70
8.4.6	Structure	70
8.4.7	Underlay	71
8.4.8	Fixings: corrugated and trapezoidal	71
8.4.9	Fixings: Trough profile	72
8.4.10	Allowance for expansion	72
8.4.11	Flashing requirements	72

Amend 2 Jul 2005

6

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E2-External-Moisture-effective-1-May-2008PDF 第 2 页 · 原页码 2

Status of Compliance Documents

Compliance Documents are prepared by the Department of Building and Housing in accordance with section 22 of the Building Act 2004. A Compliance Document is for use in establishing compliance with the New Zealand Building Code.

A person who complies with a Compliance Document will be treated as having complied with the provisions of the Building Code to which the Compliance Document relates. However, a Compliance Document is only one method of complying with the Building Code. There may be alternative ways to comply.

Users should make themselves familiar with the preface to the New Zealand Building Code Handbook, which describes the status of Compliance Documents and explains alternative methods of achieving compliance.

Defined words (italicised in the text) and classified uses are explained in Clause A1 of the Building Code and in the Definitions at the start of this Compliance Document.

E2: Document History
	Date	Alterations
First published	July 1992
Second Edition	28 February 1998	Document revised – Second edition issued
Third Edition	E2/VM1 effective from 1 July 2004 E2/AS1 effective from 1 February 2005
Amendment 1 September 2004	E2/AS1 effective from 1 July 2005	p. 2 Document Status
Reprinted incorporating Amendment 1 September 2004
Amendment 2	Effective from 1 July 2005	p. 2 Document History, Document Status pp. 5-7, 9, 10 Contents pp. 13-16 References pp. 17-20 Definitions pp. 21-24 E2/VM1 pp. 25-43, 45-47, 49, 50, 55-57, 59-67, 69-89, 93-100, 102, 103, 105-107, 111-119, 121-125, 127-135, 138, 140-144, 146, 147, 149, 150, 153-155, 157, 163-169 E2/AS1 pp. 173, 174, 177, 178 Index
Erratum 1	Effective from 1 December 2005	p. 166 Table 23
Amendment 3	21 June 2007	pp. 3 and 4, Building Code Clause E2
Amendment 4	1 May 2008	p. 2 Document History, Document Status pp. 8 and 12 Contents pp. 13-14 References pp. 171-180 E2/AS2 p. 181 Index
Note: Page numbers relate to the document at the time of Amendment and may not match page numbers in current document.

Document Status

The most recent version of this document, as detailed in the Document History, is approved by the Chief Executive of the Department of Building and Housing. It is effective from 1 May 2008 and supersedes all previous versions of this document.

People using this Compliance Document should check for amendments on a regular basis. The Department of Building and Housing may amend any part of any Compliance Document at any time. Up-to-date versions of Compliance Documents are available from www.dbh.govt.nz

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New Zealand Building Code Clause E2 External Moisture

This Clause is extracted from the New Zealand Building Code contained in the First Schedule of the Building Regulations 1992.

SR2007/124

Clause E2—External moisture

Provisions

Objective

E2.1 The objective of this provision is to safeguard people from illness or injury that could result from external moisture entering the building.

Functional requirement

E2.2 Buildings must be constructed to provide adequate resistance to penetration by, and the accumulation of, moisture from the outside.

Performance

E2.3.1 Roofs must shed precipitated moisture. In locations subject to snowfalls, roofs must also shed melted snow.

E2.3.2 Roofs and exterior walls must prevent the penetration of water that could cause undue dampness, damage to building elements, or both.

E2.3.3 Walls, floors, and structural elements in contact with, or in close proximity to, the ground must not absorb or transmit moisture in quantities that could cause undue dampness, damage to building elements, or both.

E2.3.4 Building elements susceptible to damage must be protected from the adverse effects of moisture entering the space below suspended floors.

E2.3.5 Concealed spaces and cavities in buildings must be constructed in a way that prevents external moisture being accumulated or transferred and causing condensation, fungal growth, or the degradation of building elements.

Limits on application

Requirement E2.2 does not apply to buildings (for example, certain bus shelters, and certain buildings used for horticulture or for equipment for washing motor vehicles automatically) if moisture from the outside penetrating them, or accumulating within them, or both, is unlikely to impair significantly all or any of their amenity, durability, and stability.

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SR2007/124

Provisions

Performance

E2.3.6 Excess moisture present at the completion of construction must be capable of being dissipated without permanent damage to building elements.

E2.3.7 Building elements must be constructed in a way that makes due allowance for the following:

(a) the consequences of failure;

(b) the effects of uncertainties resulting from construction or from the sequence in which different aspects of construction occur;

(c) variation in the properties of materials and in the characteristics of the site.

Limits on application

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E2-External-Moisture-effective-1-May-2008PDF 第 5 页 · 原页码 5

	Page
References	13
Definitions	17
Verification Method E2/VM1	21
1.0 Cladding systems of buildings, including junctions with windows doors and other penetrations	21
1.1 General	21
1.2 Scope	21
1.3 Specimen details	21
1.4 Test procedure	22
1.4.1 Preconditioning	22
Amend 2 Jul 2005 1.4.2 Series 1 Static pressure water penetration	22
Amend 2 Jul 2005 1.4.3 Series 1 Cyclic pressure water penetration	22
1.4.4 Series 2 "Water management testing"	22
1.4.6 Series 3 "Wetwall test"	22
1.4.9 Exterior cladding load test	23
1.5 Alternative test options	23
1.5.1 Preconditioning	23
Amend 2 Jul 2005 1.5.2 Series 1 Static pressure water penetration	23
2.0 Pitched roofing systems over a ventilated roof space of 15° pitch or more	23
3.0 Skillion roofs and commercial and industrial roofing	23
Appendix 1: Pro forma	24
Acceptable Solution E2/AS1	25
1.0 Scope	25
1.1 Construction included	25
1.2 Construction excluded	25
1.2.1 Outbuildings	25
Amend 2 Jul 2005 1.2.2 Spread of flame	25
1.2.3 Acoustics	25
1.3 Provisions for snow	25

1.4 Specific design	26
Amend 2 Jul 2005
1.5 Qualifications	26
2.0 General	26
2.1 Weathertightness	26
2.2 Materials	26
2.3 Systems versus materials	26
2.4 Cladding finish colours	26
2.5 Maintenance	27
2.5.1 Regular maintenance	27
3.0 Weathertightness Risk Factors	27
3.1 Establishing the risk	27
3.1.1 Definitions of risk	27
3.1.2 The risk score	27
3.2 Roof claddings	27
3.3 Wall claddings	27
3.4 Examples using the risk matrix	31
3.4.1 Example 1	31
3.4.2 Example 2	32
3.4.3 Example 3	33
4.0 Flashings	34
4.1 Materials for flashings	34
4.2 Selection of flashing materials	34
4.2.1 Durability requirements	34
4.2.2 Environment	34
4.2.3 Specific conditions of use	34
4.2.4 Surrounding materials	35
4.3 Acceptable flashing materials	35
4.3.1 uPVC flashings	35
4.3.2 Aluminium flashings	35
4.3.3 Galvanized steel flashings	35
4.3.4 Aluminium-zinc coated steel flashings	35
4.3.5 Stainless steel flashings	35
4.3.6 Copper flashings	36
4.3.7 Lead sheet flashings	36
4.3.8 Zinc sheet flashings	36
4.3.9 Butyl rubber and EPDM flashings	36
4.3.10 Bituminous flashings	36

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E2-External-Moisture-effective-1-May-2008PDF 第 6 页 · 原页码 6

4.3.11	Flexible flashing tape	36
4.4	Fixings	36
4.5	Flashing requirements	36
4.5.1	Edge treatments for flashings	36
4.5.2	Metal flashing joins	36
4.6	Flashing overlaps and upstands	38
4.6.1	Overlap with roof claddings	38
5.0	Roof/Wall Junctions	40
5.1	Apron flashings	40
5.2	Gutters, barges and fascias	40
6.0	Parapets	42
6.1	Limitations	42
6.2	General	42
6.3	Capping materials	42
6.4	Metal cappings	44
6.4.1	Parapet-to-wall junctions	45
6.5	Membrane cappings	45
6.6	Integral surface cappings	45
7.0	Decks and Pergolas	48
7.1	Thresholds for decks	48
7.1.1	Slatted decks	48
7.1.2	Enclosed decks	48
7.2	Attachment to building structure	48
7.2.1	Slatted timber decks to walls	48
7.2.2	Pergolas	48
7.3	Level threshold	50
7.3.1	Enclosed decks	50
7.3.2	Ground floor level access	50
7.4	Enclosed balustrades	53
7.4.1	Deck drainage	53
7.4.2	Balustrade-to-wall junctions	53
7.4.3	Balustrade-to-deck floor junction	53
7.4.4	Metal cappings	53
7.4.5	Stanchions	54
8.0	Roof Claddings	55
8.1	General	55
8.1.1	Weathertightness	55

8.1.2	Limitations	55
8.1.3	Maintenance	55
8.1.4	Fixings	55
8.1.5	Underlays	55
8.1.6	Gutters	56
8.1.7	Roof penetrations	57
8.2	Masonry Tiles	59
8.2.1	Materials	59
8.2.2	General	59
8.2.3	Installation	59
8.2.4	Flashings and fixings	59
8.2.5	Anti-ponding boards	59
8.2.6	Details and flashings	59
8.2.7	Penetrations	62
8.3	Pressed Metal Tiles	64
8.3.1	Limitations	64
8.3.2	Installation	64
8.3.3	Tiles	64
8.3.4	Metal substrate	64
8.3.5	Roof pitch	64
8.3.6	Underlay	65
8.3.7	Fixings	65
8.3.8	Flashings	65
8.3.9	Gutters, barges and fascias	68
8.3.10	Roof penetrations	68
8.4	Profiled Metal Roof Cladding	69
8.4.1	Limitations	69
8.4.2	General	69
8.4.3	Materials	69
8.4.4	Profiles	70
8.4.5	Roof pitch	70
8.4.6	Structure	70
8.4.7	Underlay	71
8.4.8	Fixings: corrugated and trapezoidal	71
8.4.9	Fixings: Trough profile	72
8.4.10	Allowance for expansion	72
8.4.11	Flashing requirements	72

Amend 2 Jul 2005

6

E2-External-Moisture-effective-1-May-2008

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中文简介

English summary

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Contents

Status of Compliance Documents

Document Status

New Zealand Building Code Clause E2 External Moisture

SR2007/124

Contents

Contents

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