Conservation or restoration of timber-based products

The standard focuses on technical information and resources for the conservation or restoration of timber-based products

CITB has developed this standard in discussion with industry. 


Minimum 3 days of 6 learning hours per day

Purpose / Scope

This training module is intended to focus on the trainee being able to use technical information and resources to conservation or restoration of timber-based products.

The scope covers:

  • recognition of historical significance
  • reversible alterations
  • impact assessment
  • safe heritage culture
  • preparation and planning
  • programming and working to time allocations
  • previous interventions
  • effects of changes to buildings
  • styles of joints
  • fixing techniques
  • load bearing and non-load bearing elements
  • understanding structure

Occupational relevance

Training delivered against this standard would be relevant to the following occupational groups:

  • operative and craft
  • supervision
  • management and leadership.

Candidate pre-requisites

Candidates must have successfully completed NVQ level 2 in Wood occupations (or equivalent).

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 5 years relevant industrial experience
  • A verifiable CV.


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

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

The class size and candidate/instructor ratio must allow training to be delivered in a safe manner and enable candidates to achieve the learning outcomes.

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

  • classroom
  • workshop

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

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


For the successful completion of training, candidates must complete an end of course 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.

Renewal / refresher

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

Approval date


Review cycle

Either on request or in 3 year(s) from approval date.

Learning outcomes

The candidate will be able to:

  • Demonstrate a recognition of historical significance and carrying out reversible alterations.
  • Carry out impact assessments.
  • Display the appropriate methods and the establishment of a safe culture on site to protect the heritage and its context.
  • Demonstrate preparation and planning.
  • Demonstrate programming and working to time allocations.
  • Recognising previous interventions.
  • Describe the further effects of changes to buildings.
  • Explain styles of joints, their age-related nature.
  • Carry out fixing (installation) techniques (for components).
  • Describe load bearing and non-load bearing elements.
  • Demonstrate an understanding of structure.

Additional information

Recommended reading:

Bevis Claxton (2008) Maintaining and repairing old houses: a guide to conservation, sustainability and economy, Crowood Press

Christopher Brereton (1990) The repair of historic buildings: Advice on principles and methods English Heritage

Kate Clark (2001) Informed Conservation: Understanding Historic Buildings and their landscapes for conservation Royal Commission on Historical Monuments