APPROVED DOCUMENT L1B – Conservation of fuel and power in existing dwellings
- Building Design Expert
- 4 years ago
Date published: May 2010, reprinted December 2010 with corrections
The 2010 edition (as amended) of Approved Document L1B, Conservation of fuel and power in existing dwellings came into effect on 1 October 2010.
Further amendments to the 2010 edition came into effect on 6 April 2014 for use in England*. They update references to third party guidance and correct some typographical errors. There are no changes to energy efficiency standards.
They add to earlier amendments* that came into effect between January and July 2013 to take account of a recast of the European Energy Performance of Buildings Directive and the introduction of a new Approved Document 7.