The BBA (British Board of Agrément) and RDL (Robust Details Ltd) have joined forces to form a joint venture called Constructive Details Limited (CDL). Under this initiative the two companies aim to work together with the construction industry to provide solutions to the heat loss in junctions due to linear thermal bridging.

CDL is pleased to announce the launch of its first handbook incorporating masonry detail junctions developed for the Aircrete Products Association. The Handbook is available electronically on the CDL website under  www.constructivedetails.co.uk/resources and can be downloaded free of charge, after a simple registration process.

The junctions are for partial fill external wall (16 details) and full fill party wall (5 details). Another handbook of the same junctions but for a fully filled external wall cavity is already under assessment.

The handbook contains a complete set of junctions needed to construct a dwelling allowing optimum thermal bridging performance to be achieved. They match the ones currently featured in Appendix K of SAP 2009 with clear and simple drawings, easy to follow examples for achieving the desired psi-values, checklists for use on site and guidance on the amount of insulation needed.

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