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Update 29th March 2021

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Installing External Wall Insulation in the Workplace

Level 2
Credit Value
Guided Learning Hours
The aim of this unit is to illustrate the skills, knowledge and understanding required to confirm competence in installing external wall insulation in the workplace within the relevant sector of industry.

Learning Outcomes Assessment Criteria
The Learner Will The Learner Can

Interpret the given information relating to the work and resources when installing external wall insulation.

  • 1.1. - Interpret and extract relevant information from drawings, specifications, schedules, method statements, risk assessments manufacturers’ information and data sheets.
  • 1.2. - Comply with information and/or instructions derived from risk assessments and method statements.

  • 1.3. - Describe the organisational procedures developed to report and rectify inappropriate information and unsuitable resources and how they are implemented.

  • 1.4. - Describe different types of information, their source and how they are interpreted in relation to:
    – drawings, specifications, schedules, method statements, risk assessments, manufacturers’ information and data sheets, and current regulations governing buildings.


Know how to comply with relevant legislation and official guidance when installing external wall insulation.

  • 2.1. - Describe their responsibilities regarding potential accidents, health hazards and the environment whilst working:
    – in the workplace, below ground level, in confined spaces, at height, with tools and equipment, with materials and substances, with movement/storage of materials and by manual handling and mechanical lifting.
  • 2.2. - Describe the organisational security procedures for tools, equipment and personal belongings in relation to site, workplace, vehicles, company and operative/technician.

  • 2.3. - Explain what the accident reporting procedures are and who is responsible for making reports.


Maintain safe and healthy working practices when installing external wall insulation.

  • 3.1. - Use health and safety control equipment safely and comply with the methods of work to carry out the activity in accordance with current legislation and organisational requirements when installing external wall insulation.
  • 3.2. - Demonstrate compliance with given information and relevant legislation when installing external wall insulation in relation to the following:
    – safe use of access equipment and work platforms
    – safe use, storage and handling of materials, tools and equipment
    – specific risks to health.

  • 3.3. - Explain why and when health and safety control equipment, identified by the principles of prevention, should be used, relating to installing external wall insulation, and the types, purpose and limitations of each type, the work situation and general work environment, in relation to:
    – collective protective measures
    – personal protective equipment (PPE)
    – respiratory protective equipment (RPE)
    – local exhaust ventilation (LEV).
  • 3.4. - Describe how the relevant health and safety control equipment should be used in accordance with the given working instructions.
  • 3.5. - Describe how emergencies should be responded to in accordance with organisational authorisation and personal skills when involved with fires, spillages, injuries and other task-related activities.


Select the required quantity and quality of resources for the methods of work to install external wall insulation.

  • 4.1. - Select resources associated with own work in relation to materials, components, fixings, tools and equipment.

  • 4.2. - Describe the characteristics, quality, uses, sustainability, limitations and defects associated with the resources in relation to:
    – insulation materials, tracks, adhesives, sealants, mechanical fixing components, pre-formed trims, tracks and shims, beads, joints and cills
    – vapour control/airtightness layers
    – hand tools, portable power tools and equipment.

  • 4.3. - Describe how the resources should be used correctly and how problems associated with the resources are reported.

  • 4.4. - Explain why the organisational procedures have been developed and how they are used for the selection of required resources.

  • 4.5. - Describe any potential hazards associated with the resources and methods of work.

  • 4.6. - Describe how to calculate quantity, length, area and wastage associated with the method/procedure to install external wall insulation.

Minimise the risk of damage to the work and surrounding area when installing external wall insulation.

  • 5.1. - Protect the work and its surrounding area from damage in accordance with safe working practices and organisational procedures.

  • 5.2. - Minimise damage and maintain a clean work space.
  • 5.3. - Dispose of waste in accordance with current legislation.
  • 5.4. - Describe how to protect work from damage and the purpose of protection in relation to general workplace activities, other occupations and adverse weather conditions.

  • 5.5. - Explain why the disposal of waste should be carried out safely in accordance with environmental responsibilities, organisational procedures, manufacturers’ information and data sheets, statutory regulations and official guidance.


Complete the work within the allocated time when installing external wall insulation.

  • 6.1. - Demonstrate completion of the work within the allocated time.

  • 6.2. - Describe the purpose of the work programme and explain why deadlines should be kept in relation to:
    – types of progress charts, timetables and estimated times
    – organisational procedures for reporting circumstances which will affect the work programme.


Comply with the given contract information to install external wall insulation to the required specification.

  • 7.1. - Demonstrate the following work skills when installing external wall insulation:
    – removing, measuring, marking out, fitting, filling, finishing, positioning and securing.

  • 7.2. - Use and maintain hand tools, portable power tools and ancillary equipment

  • 7.3. - Prepare and install external wall insulation to given working instructions, relating to one of the following:
    – pre-finished insulation systems/methods
    – non-finished insulation systems/methods.

  • 7.4. - Carry out pre and post installation checks.
  • 7.5. - Describe how to apply safe, healthy and environmental work practices, follow procedures, report problems and establish the authority needed to rectify them, to:
    – carry out external and internal pre-installation checks: level, plumb, structural integrity, dampness, vents, services (gas, electric, water, media cables)
    – recognise the procedures to check flues and combustion air ventilation
    – understand the implications of existing guarantees and warranties
    – confirm condition of substrate for installation
    – remove existing defective surface finishes
    – install pre-finished or non-finished insulation systems/methods to all surface areas including door and window reveals
    – minimise the effects of thermal bridging
    – make good existing surface finishes
    – reinstate ancillary wall fixtures (downpipes, fences, handrails)
    – provide temporary protective covers to work areas
    – apply treatments to existing walls
    – cut and fix pre-formed trims
    – cut and fix mounting blocks
    – cut, line, level, drill and fix tracks, beads, shims, joints, cills
    – complete post installation checks: compliance with specifications, water penetration, anchorage/fixing, vents, services (gas, electric, water, media cables)
    – install vapour control barriers/airtightness layers where appropriate
    – recognise when specialist skills and knowledge are required and report accordingly
    – recognise specific requirements for structures of special interest, traditional construction (pre 1919) and historical significance
    – use hand tools, portable power tools and equipment
    – work at height
    – use access equipment and work platforms.
  • 7.6. - Describe the needs of other occupations and how to effectively communicate within a team when installing external wall insulation.

  • 7.7. - Describe how to maintain the tools and equipment used when installing external wall insulation.

Assessment guidance and/or requirements
This unit must be assessed in a work environment, in accordance with the ConstructionSkills‘ Consolidated Assessment Strategy for Construction and the Built Environment.
Assessors for this unit must have verifiable, current industry experience and a sufficient depth of relevant occupational expertise and knowledge, and must use a combination of assessment methods as defined in the Consolidated Assessment Strategy.
Workplace evidence of skills cannot be simulated.
This unit must be assessed against one of the following endorsements:
– Pre-finished insulation systems
– Non-finished insulation systems.