Transcription of Conventions for U-value calculations - BRE Group
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Conventions for U-value calculations [Brian Anderson], Ludmilla Kosmina BR 443 2019 Edition ii Authors, contributors and acknowledgements Authors: [Brian Anderson](BRE), Ludmilla Kosmina (BRE) Contributors: Gerry Pettit (CBA, BSI); Bill Hawker (Brett Martin); Jeremy Dunn (Glazingvision); Nigel Blacklock (Bauder); Andrew Carpenter (Structural timber); Chris Roddick (Bauder); Ian Loughnane (Kingspan); Gary Morgan (BFRC/GGF); Jon Denyer (BBA); James Walker (Structural timber); Jonathan Ducker (Kingspan); Matthew Evans (Kingspan); Martin Ford (CAB); Martin Milner (Structural timber); Nicolas Dupin (Velux); Nick Selves (MCRMA); Paul Felgate (Bauder); Peter Wilcox (Recticel).
3.10.4 Reflective breather membranes, vapour control layers, air barriers. 13 4 Details of U-value calculations 14 Surface resistance 14 Mortar joints in masonry construction 14 Voided masonry units 15 Timber fraction for timber-framed walls 15 4.4.1 Conventional timber studs 15 4.4.2 I-beam studs 16 Timber fractions for other elements 17
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