Internal wall insulation RF

The purpose of this is to cover different ways of renovating and upgrading existing solid wall housing stock to improve the thermal efficiency of homes.


Internal wall insulation RF 


Minimum 1 day of 6 learning hours. 


The purpose of this is to cover different ways of renovating and upgrading existing solid wall housing stock to improve the thermal efficiency of homes. 


  • the range of internal wall linings which apply depending on the condition of existing walls 
  • improved U Value’s as a result of upgrading existing walls 
  • thicknesses of thermal boards used 
  • air leakage in existing buildings 
  • customer care 
  • estimating for internal wall linings 

Occupational relevance 

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

  • operative and craft 
  • supervision 


There are no candidate pre-requisites as part of this standardHowever a basic knowledge of interior systems terminology and techniques would be beneficial.

Instruction/ supervision 

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

  • a train the trainer or instructional techniques course certificate  
  • successfully completed training to this standard  
  • at least 2 years relevant industrial experience 
  • verifiable CV.


Delivery may be in an on or off the job environment. 

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

The following delivery methods may/may not be used in the delivery of this standard: 

  • classroom.

This standard is considered to contain 51% or more theoretical training. 

This standard is considered to be set at an intermediate level. 


For the successful completion of training, candidates must complete an end of course practical assessment or knowledge test 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 refreshment requirements for this standard. 

Approval date 


Review cycle 

Either on request or in 3 years from approval date. 

Learning outcomes

The candidate will be able to: 

Additional guidance to support learning outcome  

Describe existing backgrounds and the criteria that determine the lining system.  


Describe the importance of customer care when work is carried out.  


Explain how to address thermal bridging and the work required to install systems correctly. 


Know what U values are and what can be achieved with different thicknesses of thermal boards. 


Describe the implications of condensation within renovated wall linings. 


Describe the system components used and how they are installed. 


Sealing all gaps to prevent heat loss through air leakage. 


Use the required tools to install the wall lining. 


Explain the importance of insulating reveals around window and door openings.  


Additional information about this standard 

PAS 2035/2030:2019 

Retrofitting dwellings for improved energy efficiency. Specification and guidance. Specification for the installation of energy efficiency measures in existing dwellings and insulation in residential park homes.