Part L1B

NBS Building Regulations - Main changes in the 2014 edition

 

1402_APPWAL_L1B_00010

Main changes in the 2014 edition

Main changes in the 2014 edition

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  [ CIS link: Building Regulations 2010.  Statutory Instruments SI 2010/2214 ] . Regulation 2(1) of the Building Regulations  [ CIS link: Building Regulations 2010.  Statutory Instruments SI 2010/2214 ] 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:

• 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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