Energy and the Conservation of Fuel and Power

    Part L, Technical handbook 6 and Part F

    In England and Wales, Building Regulations for the conservation of fuel and power are covered by Part L and its accompanying "Approved Documents". The current Part L regulations came into effect on October 1st 2010 and the next stage of changes are expected in April 2013.  For Scotland the regulations are published in technical handbooks.  Section 6 deals with energy last updated in 2011.  For northern Ireland the regulations are in Part F updated 2006.

    To help you understand the implications of changes to the Building Regulations Part L 2010  (England and Wales),  we have produced a summary of the changes in our latest update -  Bulletin 10.

    In response to requests from the Industry for a clear long term framework, the Government Department for Communities and Local Government (CLG) has subsequently publicised a roadmap for future changes in Part L. Changes are to be introduced in 2013, 2016 and 2019 gradually improving the energy efficiency of buildings. By 2016 new homes are intended to be zero carbon.

    One of the most significant changes in the regulations was the introduction of  Window Energy Ratings (WER) as an alternative to U values as a criterion for compliance.  Window Energy Ratings are a much more accurate indicator of the energy performance of a window because they take a range of factors into account, including the useful solar heat gain. We have explained Ratings in more detail in our our Window Energy Ratings Bulletin 3.

    Window Energy Ratings are  administered by the British Fenestration Rating Council (BFRC), Thermal Rating Register (Certass) and the BSI.  Detailed information on obtaining BFRC Ratings for windows can be found on:

    On 6th April 2010, the Scottish Government released new versions of the domestic and non-domestic Technical Handbooks in support of the Building (Scotland) Amendments Regulations 2010.  Significant changes have been made to Section 6 covering energy.  They will come into effect on 1st October 2010.

    To help you understand the major changes and implications for glazing, we have produced a summary in our Bulletin 11.

    For existing homes in Scotland, the Window Energy Rating (WER) is now an established route to compliance for replacement windows and windows for extensions.  WER is a much more accurate indicator of the energy performance of a window than the simple U value because it takes into account a range of factors, including passive solar heat gain.  We have explained WER in more detail in our Bulletin 3.

    To view details of the full Pilkington range of Thermal Insulation glass, please click here.

    There are a range of Pilkington products that help builders and designers meet the various energy conservation regulations.  Pilkington energiKare is a range of products that proviides low U values and up to A rated Window Energy Rated windows.  Pilkington energiKare units are made by Pilkington and energikare partners across the country.  Pilkington Insulight is the trade name for Pilkington manufactured insulating glass units that offer a wide choice of energy management options.  Pilkington Insulight can include Pilkington Suncool, a range of solar control glass products that combine low e, low U values with solar control with neutral appearance.  Also available with Activ self cleaning glass.  Pilkington Optitherm is a range of low e products that provides very low U values.  

    Pilkington Optitherm or the K Glass range cam be combined with Activ self cleaning glass, Optifloat tinted glass, Eclipse Advantage etc to give a broad choice of thermal and solar control properties.


    To view details of the full Pilkington range of Thermal Insulation glass to help you meet the new Part L regulations please click here.

    To find out more about Part L and how Pilkington can provide support to specifiers and trade customers please click here.

    To download the England and Wales Part L regulations click here.

    To download the Scottish regulations #6 click here.

    To download the Northern Ireland Part F regulations click here.