England & Wales Building Regulations: Part L1A conservation of fuel and power: New dwellings - A brief summary of requirements (Version 2)

TRADA image

Part L1A, which came into effect in April 2006, is concerned with conserving the energy used by buildings in their day-to-day usage, as well as reducing carbon dioxide (CO2) emissions.

Every aspect of thermal performance has a part to play.

This Construction Briefing is an overview of the factors which contribute to energy loss, and the precautions that can be taken to help the conservation of fuel and power and comply with Part L1A.

This sheet offers a breakdown of the different components of a house which can effect thermal performance, and offers commentary of the nine steps of complying with Part L1A.


  • Introduction
  • Fig 1: Key factors affecting the energy performance of a house addressed by Part L1A
  • The nine steps to complying with Part L1A

Suggested Reading

Dynamic response of timber flitch beamsnavigation-arrow

Through experimental analysis, James Norman, Joel Ross, Robbie Kirkbride and Toby Hill-Smith outline the damping exhibited in these complex beams.


Article from Timber 2017 Industry Yearbook

01/03/2017 |  Magazine Article  

A motorway service station - but not as we know itnavigation-arrow

Exposed timber structures sympathetic to their rural surroundings are at the heart of a recently opened motorway service station in Gloucester.


Article from Timber 2018 Industry Yearbook

14/05/2018 |  Magazine Article  

Joinery: natural retreatnavigation-arrow

Outright winner of the prestigious Wood Awards 2017, the Coastal House is a showcase for the many uses of timber and some fine joinery.


Article from Timber 2018 Industry Yearbook

15/05/2018 |  Magazine Article