Insulation and Building Treatments (IBT) Building Construction, Defects and Interfaces

Business Sectors (Suites): Insulation and Building Treatments (Construction)
Developed by: Construction Skills
Approved on: 30 Aug 2020


​This standard is about energy efficiency measures, methods of construction and common building defects in relation to the installation of insulation and building treatments and involves interpreting information, adopting safe, healthy and environmentally responsible work practices, selecting and using materials, components, tools and equipment

This standard is for people working in the occupational area of insulation and building treatments and can be used by installers, supervisors and managers

Performance criteria

You must be able to:

P1 interpret the given design information relating to the work and
resources and identify its suitability taking into consideration
building type, defects and detailing and recording and reporting
issues in regard to interfaces for the following:1.1 drawings1.2 specifications1.3 schedules1.4 method statements1.5 risk assessments1.6 manufacturers’ information1.7 data sheets
P2 comply with the given, relevant legislation, standards and official
guidance to carry out your work and maintain safe and healthy
work practices as stated for each measure to be installed
P3 select the required quantity and quality of resources for the
methods of work3.1 check the suitability, compatibility and characteristics of the
materials, components and finishes, and determine if they are
moisture open or moisture closed and their impact on the
building3.2 record and report issues or defects
P4  comply with organisational procedures to avoid the risk of
damage to the work and surrounding area by the following:4.1 protecting the work and its surrounding area from damage4.2 maintaining a safe, clear and tidy work area4.3 disposing of waste in accordance with current legislation
P5 comply with the given contract information to carry out the work
efficiently to the required specification by the following:5.1 demonstrate work skills to carry out pre-installation checks
(external and internal) in regard to building construction, defects
and material interfaces5.2 identify common building defects including but not limited to:     - salt contamination     - causes of dampness     - rain penetration     - rising damp     - internal moisture vapour     - damaged services     - structural defects

Knowledge and Understanding

You need to know and understand:

Peformance Criteria 1Interpretation of informationK1. types of information, their source, accuracy, completeness
and how they are interpreted in relation to:1.1 types of construction1.2 energy efficiency measures1.3 building treatments1.4 drawings1.5 method statement1.6 design1.7 standards1.8 manufacturers’ information1.9 data sheets1.10 official guidance1.11current legislation and regulations governing buildings
K2. the importance of organisational procedures to solve problems
and why it is important to follow them
Performance Criteria 2Safe work practicesK3. relevant, current legislation, standards and official guidance and
how they are applied
K4. how emergencies should be responded to in accordance with
organisational authorisation and personal skills in relation to:4.1 fires, spillages, injuries4.2 emergencies relating to occupational activities4.3 identification of and reporting of asbestos containing materials
K5. how to report risks and hazards identified by the following:5.1 risk assessment5.2 personal assessment5.3 methods of work5.4 safe systems of work5.5 manufacturers’ technical information5.6 data sheets5.7 statutory regulations5.8 official guidance5.9 Control of Substances Hazardous to Health (COSHH)
K6. the accident reporting procedures and who is responsible for
making the report
Performance Criteria 3Selection of resourcesK7. why the characteristics, compatibility, quality, uses, sustainability,
limitations and defects associated with the resources are
important and how defects should be rectified
K8. the organisational procedures to select resources, why they have
been developed and how they are used
K9. how to confirm the resources and materials conform with the
K10. how the resources should be used and how any problems
associated with the resources are reported
K11. how to identify the hazards associated with the resources and
methods of work and how they are overcome
Performance Criteria 4Minimise the risk of damageK12. the importance of protecting the work and its surrounding area
against the risk of damage
K13. how to protect work and its surrounding area from damage by
general workplace activities, other occupations and adverse
weather conditions and how to minimise damage to existing
building fabric
Performance Criteria 5Meet the contract specificationK14. how the methods of work to meet the specification, are carried
out and how problems are identified and reported by the
application of knowledge for safe, healthy and environmental
work practices, procedures and skills relating to the method
and area of work
14.1 the suitability, compatibility and characteristics of the materials,
components and finishes, and determine if they are moisture
open or moisture closed, their impact on the building and
their appropriateness to the design and physical application
14.2 how to record and report issues or defects with the materials,
components and finishes
14.3 why it is important to carry out external and internal
pre-installation checks
14.4 how to carry out external and internal pre-installation checks,
assessing, recording and reporting issues to include but not
limited to:

  • property suitability
  • structural integrity
  • dampness
  • decay
  • exposure ratings
    - vents and ventilation
    - services (gas, electric, water, media cables)
    14.5 why it is important to ensure that all necessary repairs are
    completed prior to installation
    14.6 the implications that types of construction and materials have
    on the introduction of energy efficiency measures and other
    forms of building treatments with specific reference to:       - roofs       - walls including internal and external finishes       - floors       - windows and doors       - chimneys and fireplaces       - flues and combustion ventilation       - fabric interfaces       - existing services
    14.7 the importance of the correct sequencing of installation of
    energy efficiency measures and building treatments
    14.8 how performance varies in different construction types,
    locations and through the impact of habitation and usage
    14.9 how alterations, additions and extensions to the original
    construction can affect the performance of the building
    14.10 how to identify common building defects including but not
    limited to: salt contamination and causes of dampness, rain
    penetration, rising damp, internal moisture vapour, damaged
    services, structural defects and understand the implications of
    these when they are present
    14.11 how achieving continuity of the insulation and building
    treatments can prevent problems such as water ingress, poor
    energy efficiency and thermal bridges, whilst understanding
    the unique circumstances at party walls and the associated
    risks to adjacent properties
    14.12 how to recognise unintended consequences, why they
    happen, how to avoid them and the importance of moisture
    content in external fabric including but not limited to:          - impacts on neighbouring properties          - insulation fitting and placement for different insulation
    types          - junctions          - thermal bridging and condensation risks          - thermal bypassing          - void ventilation
    14.13 the potential causes of mould and fungal decay in buildings
    and the impact of ventilation and air flow following the
    installation of thermal efficiency measures
    14.14 the implications of building defects and the repairs required
    and how they will affect the choice of energy efficiency
    measures and building treatments
    14.15 the importance of compatibility and interactions between
    measures and the fabric of the underlying building
    14.16 how to identify specialist skills and knowledge are required
    and report accordingly, including but not limited to:
    - fire safety
    - electrical
  • gas
    - asbestos
    - Radon
  • heritage
  • ecology
  • archaeological and architectural features
    - ventilation
  • dampness and building exposure
    14.17 the relevance of an assessment of significance and how to
    recognise specific requirements for structures of special
    interest, traditional construction, hard-to-treat buildings and
    historical significance
    14.18 how your actions can lead to unintended consequences, why
    they happen, how to avoid them and the importance of
    reporting them
    15 the importance of team work and communication
    16 the needs of other occupations associated with IBT building
    construction, defects and interfaces


Scope Performance

Scope Knowledge





Links To Other NOS

External Links

Version Number


Indicative Review Date

30 Mar 2027





Originating Organisation


Original URN


Relevant Occupations

Construction Operatives

SOC Code



Energy efficiency measures; Thermal bridging, Thermal bypassing; Void ventilation