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Lead Sheet Craft Operative - Basic Bossing


The purpose of this standard is to provide delegates with an introduction to basic lead sheet bossing.


3 days of 6 learning hours per day


The purpose of this standard is to provide delegates with an introduction to basic lead sheet bossing.

The scope:

  • understanding of the Code Of Practice Design Recommendations.
  • understanding the hazards associated with working with lead sheeting
  • advantages and disadvantages of bossing over welding
  • the correct use of tools and equipment used for bossing
  • and form lead using hand tools and cold working techniques for roofs to include internal and external corners, bossed roll end and abutment front aprons, bossed back gutters.
  • understand the correct use of front aprons, bossed back gutters, saddle flashings and chute outlets.
  • correct way to recycle waste materials.

Occupational relevance

Training delivered against this standard would be relevant to the following occupational group(s):

  • operative and craft
  • supervision

Delegate Pre-requisites

There are no delegate pre-requisites as part of this standard. However, a basic knowledge of roofing terminology and techniques would be beneficial.


As a minimum, course trainer must be able to demonstrate that, in relation to this standard, they have:

  • an award in education and training (or equivalent, as per the requirements for approved training organisations)
  • successfully completed training to this standard
  • at least 3 years relevant industrial experience
  • a verifiable CV


Delivery may be in an off the job environment.

All materials and equipment must be of a suitable quality and quantity for delegates to achieve learning outcomes and must comply with relevant legislation.

The class size and delegate/trainer ratio must allow training to be delivered in a safe manner and enable delegates to achieve the learning outcomes.

At least 80% of the training must be practical activities.

The following delivery methods may be used in the delivery of this standard:

  • classroom
  • a blend of classroom and remote

This standard is considered to contain 51% or more practical learning.

This standard is considered to be set at a basic level.


Methods of assessment considered appropriate for training delivered against this standard are:

For the successful completion of training, delegates must complete an end of course practical assessment that measures the learning outcomes and has a pass or fail criteria.

Quality Assurance


Quality assurance against this standard will require initial approval of the training organisation and their content mapped to the standard.

CITB will also conduct an approval intervention, either desk-based or centre visit, to ensure the training organisation can meet the requirements of the training standard.

Approved training organisations (ATOs) will be required to present information on records of training and assessment upon request to CITB for desk-based analysis. They will also be visited annually by the CITB quality assurance team.


There are no mandatory renewal or recommended refresher requirements for this standard.



(Please note standards using this classification will only be grant aided once per delegate)

Approval date

March 2022

Review cycle

On request or 3 years from approval date.

Learning outcomes

The delegate will be able to:

  • interpret the code of practice design recommendations
  • describe the importance of hygiene in relation to the Control of Lead at Work Regulations 2002. And discuss the hazards and risks associated with working on roofing systems with lead and the precautions to be observed and how to mitigate them
  • describe the advantages and disadvantages of bossing over welding
  • identify the tools and equipment commonly used in bossing
  • shape sheet lead using hand tools and cold working techniques
  • demonstrate practical ability in bossed internal corners.
  • demonstrate practical ability in bossed external corners
  • demonstrate practical ability in bossed roll end
  • demonstrate practical ability in bossed roll abutment
  • demonstrate practical ability in the use of bossed front aprons
  • demonstrate practical ability in bossed back gutters
  • clean all work areas and store scrap lead ready for recycling

Additional guidance to support learning outcome

  • LCA Ultimate Guide to Best Practice, Lead Sheet Training Academy Manual & BS 6915: Design and construction of fully supported lead sheet roof and wall coverings
  • lead in blood testing, minimum levels of lead in blood, correct PPE, Manual Handling etc.

Additional information about this standard