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Install and maintain roofing, rainwater handling, and cladding systems,
and flashings
Level
4
Credits
25
Purpose
This unit standard is for people who work in the plumbing industry.
People credited with this unit standard are able to: install vapour barrier
substrates; install metal and translucent roofing systems; install rainwater
handling systems; determine runoff and ensure performance for roof and
rainwater handling systems; install metal cladding systems; design, draw,
prepare, and install flashings; maintain roofing, rainwater handling, and
cladding systems, and flashings; work safely and with care; and demonstrate
knowledge of regulatory requirements, selection of methods and materials,
and underpinning concepts and principles, as applied to the installation and
maintenance of roofing, rainwater handling, and cladding systems, and
flashings.
Subfield
Plumbing, Gasfitting and Drainlaying
Domain
Plumbing
Status
Registered
Status date
25 October 2007
Date version published
25 October 2007
Planned review date
31 December 2012
Entry information
Prerequisite: Unit 15757, Employ fall arrest systems on
building and construction sites, or demonstrate
equivalent knowledge and skills.
Replacement information
This unit standard replaced unit standard 2147, unit
standard 2163, unit standard 2164, and unit standard
2165.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
The Skills Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0008
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
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21884 version 1
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Special notes
1
Legislation and codes applicable to this unit standard include but are not limited to:
Health and Safety in Employment Act 1992;
Building Act 2004;
New Zealand Building Code, Clause E1 Surface Water, and Clause E2 External
Moisture, current versions and any related compliance documents, available at
http://www.dbh.govt.nz.
Any legislation or code superseding any of the above will apply, pending review of
this unit standard.
2
Definitions
Job requirements refers to specific requirements of the job at hand not covered by
job specifications.
Job specifications, for the purpose of this unit standard, refers to instructions (oral,
written, graphic) and may include any of the following: manufacturers’ instructions;
design drawing detail specifications; specifications from a specialist source such as
an architect, designer, engineer, or a supervisor; and site or work specific
requirements. Where job specifications are in conflict with applicable legislation,
standards, and/or codes, such legislation, standards, and/or codes shall take
precedence for the purpose of assessment.
Maintain may refer to all or any of – repair, upgrade, alter, remove.
Other services refers to any existing installed services.
Regulatory requirements, for the purpose of this unit standard, refers to applicable
legislation, standards, and codes.
Elements and performance criteria
Element 1
Install vapour barrier substrates.
Performance criteria
1.1
Vapour barrier substrates are installed in accordance with design detail
specifications and relevant codes.
Element 2
Install metal and translucent roofing systems.
Performance criteria
2.1
Quantities are calculated to meet job requirements.
Range
roof area; length, type, and number of sheets; lengths of ridging.
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2.2
Metal roofing systems are selected and installed in accordance with design
detail specifications and relevant codes.
Range
corrugated, trough section, flat surface;
expansion and contraction provision, stop end and drip form to
sheets, install over flashings, accessories.
2.3
Translucent roofing system is selected and installed in accordance with design
detail specifications and relevant codes.
2.4
The installation meets requirements of the Building Act 2004.
Element 3
Install rainwater handling systems.
Range
gutters, spouting, downpipes, valleys, rainheads, rainwater harvesting.
Performance criteria
3.1
Rainwater handling systems are selected and installed in accordance with
design detail specifications and relevant codes.
3.2
The installation meets requirements of the Building Act 2004.
Element 4
Determine runoff and ensure performance for roof and rainwater handling systems.
Performance criteria
4.1
Flow calculations for roof and rainwater handling systems are in accordance
with actual runoff.
4.2
Installed roof and rainwater handling systems perform to design function in
terms of weathertightness.
Element 5
Install metal cladding systems.
Performance criteria
5.1
Cladding systems are selected and fixed in accordance with design detail
specifications and relevant codes.
5.2
The installation meets requirements of the Building Act 2004.
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Element 6
Design, draw, prepare, and install flashings.
Range
penetration, negative detail (sill, side), positive detail (soaker, barge, ridge,
diverter, head, parapet), lead fabrication burning, lead bossing, sealant.
Performance criteria
6.1
Flashings are designed, drawn, and prepared in accordance with job
specifications and the prevention of capillary action and corrosion.
6.2
Flashings are installed in accordance with job specifications and relevant codes.
6.3
Installed flashings achieve weathertightness.
6.4
The installation meets requirements of the Building Act 2004.
Element 7
Maintain roofing, rainwater handling, and cladding systems, and flashings.
Performance criteria
7.1
Faults are identified in terms of causes and means of rectification.
7.2
Faults are rectified in accordance with maintenance requirements and job
specifications.
7.3
Testing of roofing systems, rainwater handling systems, cladding, and flashings
ensures they perform in accordance with maintenance requirements.
Element 8
Work safely and with care.
Performance criteria
8.1
Practical activities are carried out avoiding harm to people and damage to
property, other services, materials, tools, and equipment.
Element 9
Demonstrate knowledge of regulatory requirements, selection of methods and materials,
and underpinning concepts and principles, as applied to the installation and maintenance
of roofing, rainwater handling, and cladding systems, and flashings.
Performance criteria
9.1
Applicable sections of legislation, standards, and codes are described in terms
of their application to the installation and maintenance of roofing, rainwater
handling, and cladding systems, and flashings.
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9.2
Selection of methods and materials is justified.
Range
9.3
job specifications, operation of the installed system and
components; may include job requirements.
Underpinning concepts and principles are explained in terms of their application
to the installation and maintenance of roofing, rainwater handling, and cladding
systems, and flashings.
Range
atmospheric pressure, capillary attraction, corrosion, expansion
and contraction.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact The Skills Organisation info@skills.org.nz if you wish to suggest changes
to the content of this unit standard.
 New Zealand Qualifications Authority 2016