• Publications

    Publications

    BRE is the world’s largest research and technology organisation offering expertise in every aspect of the built environment and associated industries. We help clients create better, safer and more sustainable products, buildings, communities and businesses - and we support the innovation needed to achieve this. BRE are expert in the area of thermal performance of building fabric, and have consistently delivered for both public and private sector organisations in this area.

     

    Conventions for calculating linear thermal transmittance and temperature factors

    (BR 497)

    Amongst other measures that address the need to reduce CO2 emissions, that of having better insulated buildings requires more sophisticated methods such as numerical modelling to calculate the heat loss caused by thermal bridging at wall, roof and floor junctions and around openings.

    This guide gives the conventions that should be followed by numerical modellers to produce consistent, reproducible results. For building regulation purposes two key modelling outputs, temperature factor and linear thermal transmittance, are identified. These key outputs will enable designers to confirm the adequacy of particular junction details and help with the development of novel solutions to improve the thermal performance of junctions.

    This publication can be purchased from the BREbookshop.com

     

    Conventions for U-value calculations

    (BR 443)

    There are various standards dealing with the calculation of U-values of building elements. The conventions provide guidance on the use of the standards, indicating the methods of calculation that are appropriate for different constructional types, providing additional information about using the methods and providing data relevant to typical UK constructions.

    This publication is available from BREbookshop.com

     

    Assessing the effects of thermal bridging at junctions and around openings (IP 1/06)

    This BRE publication gives guidance on assessing the effects of thermal bridging at junctions and around openings in the external elements of buildings and how to assess their effect on the overall heat loss (or heat gain). It also provides benchmark values of critical temperature factors for various types of buildings, to limit the risk of surface condensation and mould growth.’

    This publication is available from the BRE bookshop

    Reducing thermal bridging at junctions when designing and installing solid wall insulation (2013)

    This guide sets out clear principles and methods that should be considered and adopted during the design and installation of solid wall insulation in order to reduce thermal bridging effects, maximise carbon dioxide (CO2) emission reductions and minimise the risk of condensation.

    This publication is available from the BRE bookshop

    For more information

    Call us on 0333 321 88 11 if you would like to know more, or email enquiries@bregroup.com.