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How to use LABC Registered Construction Details

Registered Construction Details – helping the industry to get it right on site

The new LABC Registered Construction Details will be relevant in England, Wales and Scotland, though there are differences in the calculations due to variations in thermal legislation between the three nations.

Registered Construction Details are an initiative to help reduce the “performance gap” identified through incorrect thermal detailing on site. The Details are the first to offer specifiers, designers, SAP assessors, builders and building control a combination of specific detail, good practice, points to watch together with BR497 modelled Psi-values. They offer the ability to design out thermal bridging, assist the assessor in thermal modelling, guide the builder on site and ensure an effective inspection regime to prevent poor performing buildings and enshrine faith in Energy Performance Certificates. Find out more about Registered Construction Details

How to use

The Registered Construction Details are built around the conventions of Table K in SAP 2012.  If you know which detail you need, then you can use the Construction Details search to locate the Detail.  Alternatively you can use the drop down menus to find the detail you need depending on the type of construction envisaged for your project.  It is important to be aware that an initial search for a detail, for example 'E5 Ground Floor' will bring up multiple details.  Each has been independently calculated to derive the Psi values. You can then use the filters to select your choice of internal leaf and reduce the number of relevant details.

CAD details will appear soon for each of the details so that they can be embedded into drawings.

The check sheet at the back of each detail is intended as an aide to compliance.  The designer should complete this for their chosen design and specify the preferred products.  The assessor can then validate thermal compliance through SAP software.  The builder can then purchase the products needed and follow the detail to ensure correct installation.  Building control and the clerk of the works can then check and sign off the detail on site once installed and the assessor can provide an Energy Performance Certificate in confidence.

Important Information

Psi values have been calculated by a person with suitable expertise and experience using the guidance set out in BR 497, Conventions for calculating linear thermal transmittance and temperature factors and BRE IP 1/06, Assessing the effects of thermal bridging at junctions and around openings. 

©  LABC Registered Construction Details, the calculations, designs, drawings and descriptions are copyright and the intellectual property of LABC, the Modern Masonry Alliance and their developers.  Customers are allowed to download and use them for project work during design, final plans, specification, energy assessments, SAP calculations and construction phases.  They may be embedded in drawings and specifications etc.  They may not be copied, reproduced in any medium, published or used for any other purpose other than building design or construction project work undertaken through the local authority building control network.  LABC Registered Construction Details are available at no cost to customers of the local authority building control network.