AD-L2 and Part J:
EPIC Guide to requirements and compliance

The Guide can be ordered on line (Link) or downloaded as below:

Easily downloadable sections
The Guide has been separated into 2 clearly defined sections for ease of downloading.

England and Wales – The 2002 regulatory requirements
Foreword
Implications of the 2002 regulations
AD-L2 requirements for England & Wales and Part J for Scotland including improved U-values; thermal transmission calculations; condensation check; and air leakage testing
Compliance with the new regulations
Actions required to meet the new regulations
Requirements for insulation performance – U-values
Mandatory requirements and thermal performance levels for metal roofing and
cladding elements– U-values. Windows doors and rooflights. Trade off between construction elements
Linear heat transmission – -values.
Limiting thermal bridging. Calculation of linear heat transmission (y- values).
Heat loss ratio for the total building fabric – ‘’ ratio
Calculation of the ‘a-value’ for the building and alternative means of compliance
Limiting the risk of condensation – f-factor
Confirmation procedure for minimum temperature factor (f-factor)
Air tightness
Requirements, testing and compliance. Air leakage identification
Infra-red thermographic testing
Designing for compliance
Approach, implications and risks
Installation to achieve compliance
Approach, implications and risks
Compliance and competent persons
Appendix
Material alterations - AD-L2
Requirements for the refurbishment of existing buildings

Scotland – The 2002 regulatory requirements
Foreword
Technical standards
New regulations including improved U-values and requirements to limit thermal bridging and air leakage. Refurbishment and repair.

Back to top. Also in this section:
Building regulations  |  Air tightness testing  |  Sustainability