25286 version 1
Page 1 of 4
Describe re-roofing an existing metal tile roof
Level
3
Credits
3
Purpose
People credited with this unit standard are able to describe: the planning and
checks required prior to re-roofing; re-roofing procedure; re-coating
procedure for metal tile roofs; and the use of metal tiles as an overlay option
on existing roofs.
Subfield
Plumbing, Gasfitting and Drainlaying
Domain
Roofing
Status
Registered
Status date
23 January 2009
Date version published
23 January 2009
Planned review date
31 December 2013
Entry information
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 documents 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 2016
25286 version 1
Page 2 of 4
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
Industry practice – sound industry practice that meets legislative requirements.
Job specifications – refer to the documented information found in construction
drawings, project specification documents, legislation, regulations and codes.
Site procedures – refer to the procedures which are required to be observed for safe
work practices at a particular site.
Territorial authorities – city and district councils.
5
This unit standard may be assessed against off-job.
Elements and performance criteria
Element 1
Describe the planning and checks required prior to re-roofing.
Performance criteria
1.1
Existing roof inspection activities are described in terms of determining the
condition and potential hazards prior to installing the new roof in accordance
with industry practice.
Range
1.2
includes – brittle materials and asbestos, signs of deterioration,
support framing, underlay.
Site check activities are described in accordance with site procedures.
Range
preparing the site, health and safety checks and signs, site
hazards.
1.3
Importance of work planning sequence is described in terms of minimising
impact to occupants and minimising potential risks of exposure damage to
house.
1.4
Purpose of the work sheet, plan, or job schedule is described in terms of
defining the work to be done and potential hazards.
1.5
Disposal planning is described for the removed roofing in accordance with site
procedures.
1.6
NZBC compliance for re-roofing is described in accordance with territorial
authority requirements.
 New Zealand Qualifications Authority 2016
25286 version 1
Page 3 of 4
Element 2
Describe the re-roofing procedure for metal tile roofs.
Performance criteria
2.1
Process of removing existing fixings and tiles is described in accordance with
industry practice.
2.2
Checks and replacements of flashings are described in accordance with
industry practice.
2.3
Storage and handling of existing and new roofing tiles is described in terms of
industry practice.
Element 3
Describe the re-coating procedure for metal tile roofs.
Performance criteria
3.1
Re-coating is described in terms of suitability as a roof restoration solution,
compared to re-roofing.
Element 4
Describe the use of metal tiles as an overlay option on existing roofs.
Performance criteria
4.1
The use of metal tiles as an overlay on existing roofs is described in terms of
advantages and disadvantages compared to complete re-roofing.
Range
new tile over old tile, new tile over other existing roof
constructions.
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.
 New Zealand Qualifications Authority 2016
25286 version 1
Page 4 of 4
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