25294 version 1
Page 1 of 3
Level 4
Credits 4
Purpose People credited with this unit standard are able to explain: deterioration factors for liquid roof membrane; considerations for restoration of faulty liquid roof membrane; and detail for mounting and fastening plant to liquid roof membrane.
Subfield Plumbing, Gasfitting and Drainlaying
Domain
Status
Status date
Date version published
Roofing
Registered
23 January 2009
23 January 2009
Planned review date
Entry information
31 December 2013
Open.
Accreditation Evaluation of documentation and visit by NZQA and industry.
Standard setting body (SSB) The Skills Organisation
Accreditation and Moderation Action Plan (AMAP) reference 0227
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1 Legislation relevant to this unit standard includes but is not limited to – Health and
Safety in Employment Act 1992, Building Act 2004.
2 The following applicable document is available for download on the Department of
Building and Housing website: http://www.dbh.govt.nz/
– Building Code compliance document Clause E2, containing Acceptable Solution
E2/AS1 for External Moisture.

New Zealand Qualifications Authority 2020

25294 version 1
Page 2 of 3
3 The New Zealand Building Code (NZBC) is a schedule to the Building Regulations
1992. It provides requirements for compliance with the Building Act 2004 when constructing a new building or altering an existing one. The Building Code sets out performance standards that building work must meet and covers aspects such as structural stability, fire safety, access, moisture control, durability, and services and facilities.
4 Definitions
Manufacturer recommendations – refer to product information and product data sheets provided by the manufacturer of any given product.
Job specifications – refer to the documented information found in construction drawings, project specification documents, legislation, regulations and codes.
5 This unit standard may be assessed against off-job.
Element 1
Explain deterioration factors for liquid roof membrane.
Performance criteria
1.1 UV deterioration rate is explained in terms of film thickness effects.
1.2
1.3
Deterioration factors are explained in terms of foot traffic effects.
Element 2
Deterioration factors are explained in terms of application thickness.
Explain considerations for restoration of faulty liquid roof membrane.
Range faults may include – poor installation or deterioration; restoration includes – localised repair, total replacement.
Performance criteria
2.1 Roof inspection activities are explained in terms of determining existing condition and potential hazards prior to repair or replacement.
2.2 Importance of work planning sequence is explained in terms of minimising impact to occupants and potential risks of exposure damage to building.
2.3 Considerations for determining the extent of membrane repairs or replacement are explained in accordance with job specifications.

New Zealand Qualifications Authority 2020

25294 version 1
Page 3 of 3
2.4 Considerations for re-roofing and repair are described in accordance with NZBC requirements.
Range includes but is not limited to
– territorial authority requirements.
2.5
Element 3
Solutions for membrane repairs or replacement are proposed in accordance with manufacturer recommendations and the NZBC.
Explain detail for mounting and fastening plant to liquid roof membrane.
Performance criteria
3.1 Detail of mounting structure, membrane coverage, and fastening placement are explained in accordance with manufacturer recommendations.
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 2020