NZQA Expiring unit standard version 2 Page 1 of 5. Install and maintain roofing, rainwater handling, and cladding systems, and flashings

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1 Page 1 of 5 Title 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. Classification Plumbing, Gasfitting and Drainlaying > Plumbing Available grade Achieved Prerequisites Unit 15757, Use, install and disestablish temporary proprietary height safety systems when working at height or demonstrate equivalent knowledge and skills. Guidance Information 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 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;

2 Page 2 of 5 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. Outcomes and performance criteria Outcome 1 Install vapour barrier substrates. 1.1 Vapour barrier substrates are installed in accordance with design detail specifications and relevant codes. Outcome 2 Install metal and translucent roofing systems. 2.1 Quantities are calculated to meet job requirements. roof area; length, type, and number of sheets; lengths of ridging. 2.2 Metal roofing systems are selected and installed in accordance with design detail specifications and relevant codes. 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 Outcome 3 Install rainwater handling systems. gutters, spouting, downpipes, valleys, rainheads, rainwater harvesting.

3 Page 3 of 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 Outcome 4 Determine runoff and ensure performance for roof and rainwater handling systems. 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. Outcome 5 Install metal cladding systems. 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 Outcome 6 Design, draw, prepare, and install flashings. penetration, negative detail (sill, side), positive detail (soaker, barge, ridge, diverter, head, parapet), lead fabrication burning, lead bossing, sealant. 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 Outcome 7 Maintain roofing, rainwater handling, and cladding systems, and flashings.

4 Page 4 of 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. Outcome 8 Work safely and with care. 8.1 Practical activities are carried out avoiding harm to people and damage to property, other services, materials, tools, and equipment. Outcome 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. 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. 9.2 Selection of methods and materials is justified. job specifications, operation of the installed system and components; may include job requirements. 9.3 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. atmospheric pressure, capillary attraction, corrosion, expansion and contraction.

5 Page 5 of 5 Replacement information This unit standard was replaced by unit standard 30545, unit standard 30546, unit standard 30547, unit standard 30548, and unit standard This unit standard replaced unit standard 2147, unit standard 2163, unit standard 2164, and unit standard This unit standard is expiring. Assessment against the standard must take place by the last date for assessment set out below. Status information and last date for assessment for superseded versions Process Version Date Last Date for Assessment Registration 1 25 October December 2022 Review 2 26 October December 2022 Consent and Moderation Requirements (CMR) reference 0003 This CMR can be accessed at Please note Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards. Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards. Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR 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.