Building Regulations 2010: Approved Documents L1B Conservation of fuel and power in existing dwellings (2014 edition) (For use in Wales)

Publication Year

2014

Document Status

Withdrawn

Abstract

Provides guidance for complying with energy efficiency requirements in existing dwellings and covers: extensions, conversions, consequential improvements, renovations, changes of use, provision, extension, alteration or replacement of building services, work to windows and doors, conservatories and porches, indoor swimming pools, alternative approaches with more design flexibility, dwellings of architectural and historic interest, notifying building control and information for the occupier.

Document History

For use in Wales. This 2014 edition came into effect 31 July 2014 and superseded: DCLG Conservation of fuel and power in existing dwellings (2010 edition incorporating further 2010 and 2011 amendments). Main changes in the 2014 edition: This approved document, Approved Document L1B: Conservation of fuel and power in existing dwellings supports the energy efficiency requirements of the Building Regulations. Regulation 2(1) of the Building Regulations defines the energy efficiency requirements as the requirements of regulations 23, 25A, 25B, 26, 26A, 26B, 28, 29 and 40 and Part L of schedule 1. It takes effect on 31 July 2014 and is for use in Wales. The 2010 edition will continue to apply to work begun before 31 July 2014, or to work subject to a building notice, full plans application or initial notice submitted before 31 July 2014. The main changes in the approved document are that: a new requirement, regulation 28 (consequential improvements to energy performance) can require additional energy efficiency measures when undertaking applicable building work. The previous 1000m² threshold has been removed for extensions and where fixed heating is provided into a previously unheated space. The guidance on consequential improvements is provided in Section 4. U values for new thermal elements have been revised, and the U value threshold for retained and refurbished thermal elements has been removed. U values for new or replacement doors have been revised. Regulation 21(4) has been modified such that if a conservatory or porch has any fixed heating system, whether an individual room heater or a heating system extended into the conservatory or porch from elsewhere in the dwelling, then the requirements of Part L will now apply. Section 9 of this document provides guidance where these buildings are not exempt. The document is in a new style format.

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