CPCPCM3021A - FLASH PENETRATIONS THROUGH WALLS AND ROOFS
CONSTRUCTION, PLUMBING AND SERVICE
INTEGRATED FRAMEWORK
TRAINING PACKAGE CPCP08
CPCPCM3021A
FLASH PENETRATIONS THROUGH ROOFS AND WALLS
LEARNING GUIDE
ACKNOWLEDGEMENTS
National Plumbing Services Training Advisory Group
Plumbing Industry Commission Victoria
© Commonwealth of Australia 2015
Construction and Property Services Industry Skills Council
PO Box 151
Belconnen ACT 2616
Tel: 02 6253 0002
www.cpsisc.com.au
This work is copyright, but permission is given to trainers and teachers to make copies and contextualise the resources for use within their own training organisation or in a workplace where training is being conducted. This permission does not extend to making copies for use outside the immediate training environment for which they are made, or the making of copies for hire or resale to third parties.
This work was first published in 2004 with the assistance of funding provided by the Commonwealth Government through the Australian National Training Authority (ANTA). The 2015 publication has been updated to reflect changes to the national units of competency.
The views expressed in this work do not necessarily represent the views of the Commonwealth of Australia or CPSISC. In addition, the Commonwealth of Australia and CPSISC do not give warranty or accept any legal liability in relation to the content of this work.
The website addresses and other contact information provided in this publication were compiled in good faith and were correct at the time of printing.
The updating of these resources was completed by:
National Plumbing and Services Training Advisory Group, with funding and support provided by the Construction and Property Services Industry Skills Council (CPSISC):
This guide was developed in consultation with representatives of the Plumbing Industry by NPSTAG and CPSISC to support the implementation of the CPC08 Construction, Plumbing and Services Training Package.
Contents
What is this resource about? 1
How do I use this resource? 1
Flexible Delivery 1
What do I have to do? 2
Flash penetrations through rooves and walls 3
Unit Descriptor 3
Element 3
Performance Criteria 3
Required knowledge 4
How will I be assessed? 5
Are there any pre-requisites? 5
What other resources will I need? 6
Texts 6
Web sites 6
Video or audio cassettes 6
Introduction 7
Types of flashing 7
Custom made flashing 7
Prefabricated flashing 8
Plan work activities 9
Establish what will be penetrating 10
Establishing what type of material will be penetrated 10
Conduct a site inspection 11
Building plans or specifications 11
Check for structural alterations 11
Quality assurance 11
Safety 12
Workplace environment and safety 12
Tools and equipment 13
Make the work site safe 14
Work notices 14
Determine flashing requirements 15
Flashing large penetrations 17
Capillary action 18
Calculating quantities and types of materials 18
Checking quantities and quality of materials 19
Carry out the job 20
Setting out the work 20
Cutting the surface 23
Processes for cutting different roofing or wall cladding materials 23
Ensuring joints are flush 24
Ensuring joints are lapped in the direction of the outlet 24
Ensuring joints are secure 24
Preparation of opening 24
Cutting the opening 24
Installing structural supports 25
Flashing of a large duct 25
Sealing 26
Soldering 26
Sealants 27
Jointing procedure for a silicone rubber sealed joint 28
Clean up 30
Worksheet 31
Practical application 34
Assessment checklist 36
© Commonwealth of Australia 2015 15
CPCPCM3021A - FLASH PENETRATIONS THROUGH WALLS AND ROOFS
What is this resource about?
Welcome to CPCPCM3021A – Flash penetrations through roofs and walls. This resource will help you gain the skills and knowledge necessary to demonstrate competence in this unit.
How do I use this resource?
This resource is divided into four main sections:
· A learning unit, which contains background information on flashing penetrations through roofs and walls
· Worksheets, which prepare you for the practical application
· Practical application, which allows you to experience installing roof and wall penetrations
· Assessment materials, which help you demonstrate competency.
To complete this unit of competence you will need to:
· read the information contained in the learning unit
· complete the worksheets as instructed
· have your answers checked by your trainer or supervisor
· work with your trainer or supervisor to practice flash penetrations through roofs and walls
· read the assessment checklist together with the assessment sheets
· complete the assessment.
·
Learning Resources are not intended to be the only source of information nor are they intended to be an exhaustive form of instruction.
Flexible Delivery
The Trainer or Supervisor may adapt and deliver this Learning Resource to suit people from a diverse background to meet equity principles and conform to Legislative policies.
What do I have to do?
To demonstrate competence in this unit you will be required to show the required level of skills and knowledge for each of the elements involved in flashing penetrations through roofs and walls:
· Prepare for work
· Determine flashing requirements
· Carry out job
· Clean up.
If you are unsure of the meaning of these elements you should read the performance criteria on the following page.
To be competent in this unit you will need to demonstrate:
· a knowledge of:
- capillary action and fabrication techniques to prevent leaking
- characteristics of various roofing and wall cladding materials and their compatibility with different joining methods
- fastening methods for different applications
· the ability to:
- organise work
- communicate effectively, in written and verbal form
- use mathematical skills to measure roof and wall cladding materials
- apply WHS procedures
CPCPCM3021A / Flash penetrations through rooves and wallsUnit Descriptor / This unit of competency specifies the outcomes required to set out, cut and flash a roof and wall penetration.
Element / Performance Criteria
Elements define the essential outcomes of a unit of competency. / Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the required skills and knowledge section and the range statement. Assessment of performance is to be consistent with the evidence guide.
1 Prepare for work / 1.1 Plans and specifications are obtained from job supervisor and site inspection
1.2 Work health and safety (WHS) and environmental requirements associated with the flashing of penetrations through roofs and walls are adhered to throughout the work
1.3 Quality assurance requirements are identified and adhered to according to workplace requirements
1.4 Tasks are planned and sequenced in conjunction with others involved in or affected by the work
1.5 Tools and equipment, including personal protective equipment, are selected and checked for serviceability
1.6 Work area is prepared to support efficient flashing of penetrations through roofs and walls
1.7 Sustainability principles and concepts are applied throughout the installation process
2 Identify flashing requirements / 2.1 Roof and wall penetrations are identified from plans and specifications
2.2 Penetrations are assessed to allow for the location of existing and future services
2.3 Material requirements are calculated from the job specification, in compliance with standards
2.4 Materials are identified, ordered and collected according to workplace procedures
2.5 Materials and equipment are checked for compliance with docket and order form, and for acceptable condition.
3 Flash penetrations / 3.1 Fabrication is undertaken according to plans and specifications
3.2 Penetration is positioned and cut in compliance with plans, specifications and site measurements
3.3 Structural supports are installed according to plans, specifications and the building code
3.4 Opening is prepared in compliance with plans and specifications, manufacturer recommendations and regulations
3.5 Proprietary or purpose-made flashing is fitted according to standards, plans, specifications and regulations
3.6 Where required, sealant is applied in compliance with specifications and manufacturer recommendations
3.7 Penetration is performance tested to ensure correct fit of completed installation, and remedied as required / 7.1
4 Clean up / 4.1 Work area is cleared and materials disposed of, reused or recycled according to legislation, regulation, codes of practice and job specification
4.2 Tools and equipment are cleaned, checked, maintained and stored according to manufacturer recommendations and workplace procedures
4.3 Information is accessed and documentation completed according to workplace requirements. / 4.4
Required knowledge
/ Required knowledge for this unit is:· capillary action, thermal expansion and fabrication techniques to prevent leaking installations
· characteristics of various roofing and wall cladding materials and their compatibility with different joining methods
· corrosion prevention treatment requirements of cut sheets
· electrolysis and problems associated with the use of dissimilar metals
· job safety analysis (JSA) and safe work method statements (SWMS)
· processes of flashing roof and wall penetrations
· relevant WHS regulations and fall protection codes and requirements
· relevant statutory requirements related to the flashing of roof and wall penetrations
· SI system of measurement.
An up to date version of the ‘Unit Descriptor’ may be located on the Australian Government web site training.gov.au
http://training.gov.au/Search/Training?searchTitleOrCode=&nrtSearchSubmit=Search&includeSupersededData=true&includeSupersededData=false&homePage=true&javaScriptEnabled=true&typeAllTrainingComponents=true
How will I be assessed?
Your trainer or supervisor will decide with you how you will be assessed. Your assessment activity may include completion of the participant worksheet and practical task selected by your trainer or supervisor. Your assessment should allow you to demonstrate all the skills and knowledge required to flash roofs and walls.
This unit may be assessed in conjunction with other units of competence. Your trainer or supervisor will tell you if you are to be assessed this way.
Are there any pre-requisites?
Prior to commencing CPCPCM3021A – Flash penetrations through roofs and walls you must have successfully completed the following pre-requisite:
· CPCPCM2043A – Carry out WHS requirements.
It is also recommended that prior to commencing CPCPCM3021A – Flash penetrations through roofs and walls you should have successfully completed the following competencies:
· CPCPCM 2048A – Cut and join sheetmetal.
Project work may also group pre-requisite and or co-requisite competencies together to carry out such projects. It is recommended that the following competencies be grouped with this unit of competency:
· Nil.
What other resources will I need?
To assist you the following resources have been suggested and should be available to you to do this competency:
Texts
· SAAHB39.
· AS/NZA3500 3 National Plumbing and Drainage.
· Puffet, R J & Hossack, L J. Plumbing Services Volume 2 Roof Plumbing. (ISBN 0 642 01705 0).
· State and Territory Regulations may override this Learning Resource.
Web sites
Video or audio cassettes
Introduction
In this unit you will look at flashing penetrations through roofs and walls. Flashing is the application of waterproof material and sealant to prevent water entering a building through openings made in the roof or walls. It also permits the roof surface and penetrating object to expand and contract without detrimental effect to any part of the roof.
A penetration is an opening created for the purpose of installing pipes, flues, ducting or structural sections through roofs or walls. You will need to have an understanding of penetrations of both pierced-fixed and concealed-fixed roof covering materials for pipes of various sizes and materials.
The installation of flues from gas appliances, boilers and solid fuel heaters, ducts from air conditioning units, skylights and roof structure components are the most common reasons for penetrating the roof or wall.
Pipes, flues, ducts, and other items that penetrate the roof are usually fitted after the roof covering has been laid. You must always remember that penetrations through the roof will be seen from the outside of the building and therefore it is essential that the job be done neatly and to a professional standard.
Types of flashing
There are two basic types of flashing – custom made or prefabricated flashing.
Custom made flashing
Custom made flashing is made on the job for the job. The type of materials to be used are purchased (usually in sheet form) then cut, shaped and fitted to the structure and the penetrating object. The advantage of this type is the flexibility to flash any shape or form of penetration regardless of the type and shape of materials. The disadvantage is the cost to the consumer due to the time involved in flashing this type of penetration.
The job specification may tell you the type of flashing material to use when custom making flashing. In some cases you will need to decide on the best material to suit the job. The main types of materials used for flashing walls and roofs are:
· sheet lead
· steel, either galvanised, zinc annealed or zinc or aluminium covered steel
· sheet zinc
· sheet copper
· sheet aluminium
· stainless steel sheet
· neoprene (synthetic rubber).
Custom flashingPrefabricated flashing
Ready made or prefabricated flashing are mass produced for retail sale. Manufacturers of ready made flashing usually supply a number of different sizes prefabricated to suit the common variety of flues, ducts and skylights. The advantage of this type of flashing is the time saved in installation. The disadvantage is that it is not available in every possible size and shape that may be required.
Prefabricated flashing uses the same types of materials as custom made flashing. The exception is the flashing is already moulded to a predetermined shape ready for fitting. You will still need to check the job specification to see which type of flashing material to use, and in some cases you will still need to decide on the best material to suit the job yourself. The main types of materials used for flashing walls and roofs are:
· lead
· steel, either galvanised, zinc annealed or zinc or aluminium covered steel
· zinc
· copper
· aluminium
· stainless steel
· neoprene (synthetic rubber).
Plan work activities
To plan the installation of flashing around a penetration you need to gather together information from several sources. The table below shows some information sources and the type of information each source can provide.
Source of information / The information providedPlans or specification / Location of installation, type of roof or wall covering, size of roof covering, pitch of roof.
Companies quality assurance / Guide to operations, installation procedures, quality of materials to use, after sales service, guarantee.
Authorities / Position of power lines and other services. Work notices and WHS, compliance certificates, scaffolding certificates.
Manufacturer’s specifications / Type of roof or wall covering, specifications of the flashing, width of cover of the material, minimum recommended pitch, fixing specifications.
Site inspection / Access to job, final measurements, handling equipment if required, lifting equipment if required.
Weather bureau / Atmospheric exposure conditions.
There are several steps you should consider when planning a flashing task. This should include: