BS IS0 21105-1:2019 BSl Standards Publication Performance of buildings Building enclosure thermal performance verification and commissioning Part 1: General requirements bsi. BSIS021105-1:2019 BRITISH STANDARD Nationalforeword This British Standard is theUK implementation of IS021105-1:2019. The UK participation in its preparation was entrusted to Technical CommitteeB/540/8,MirrorcommitteeforIS0/TC163-Thermal Performance and Energy use in the built Environment. A listoforganizationsrepresented onthis committee can be obtained on requestto its secretary. This publication does not purportto include all the necessary provisions of a contract.Users are responsible for its correct application. @TheBritishStandardsInstitution2019 PublishedbyBSIStandards Limited2019 ISBN 9780580957635 ICS91.120.10 Compliance with aBritish Standard cannot conferimmunityfrom legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2019. Amendments/corrigendaissuedsincepublication Date Text affected BSIS021105-1:2019 ISO INTERNATIONAL STANDARD 21105-1 First edition 2019-11 Performance of buildings Building enclosure thermal performance verification and commissioning Part 1: General requirements Performancedesbatiments-Verification delaperformance thermiquedeI'enveloppedesbatimentsetmiseen service Partie1:Exigencesgenerales Reference number IS0 21105-1:2019(E) ISO @ IS0 2019