ISO 21105-1:2019

INTERNATIONAL ISO
STANDARD 21105-1
First edition
2019-11
Performance of buildings — Building
enclosure thermal performance
verification and commissioning —
Part 1:
General requirements
Performance des bâtiments — Vérification de la performance
thermique de l'enveloppe des bâtiments et mise en service —
Partie 1: Exigences generales
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and Definitions . 1
4 Commissioning process . 3
5 Risk assessment to determine the level of BECx . 5
6 Levels of BECx program . 7
7 Phases of BECx program . 8
7.1 General . 8
7.2 Predesign phase . 8
7.2.1 General. 8
7.2.2 Predesign scope of work . 9
7.2.3 BECx project team. 9
7.2.4 Owner’s project requirements - building enclosure . 9
7.2.5 BECx introductory meeting .10
7.2.6 BECx budget .11
7.2.7 BECx tasks .11
7.2.8 BECx plan .12
7.2.9 Basis of design review .12
7.2.10 BECx progress report .12
7.3 Design phase .12
7.3.1 General.12
7.3.2 Design phase meeting.12
7.3.3 Level 1 (basic) BECx design review .13
7.3.4 Level 2 (intermediate) BECx design review .14
7.3.5 Level 3 (comprehensive) BECx design review .15
7.3.6 BECx specification .16
7.3.7 OPR and Cx plan updates .16
7.4 Construction phase .16
7.4.1 General.16
7.4.2 Construction phase documentation requirements .17
7.4.3 Level 3 (comprehensive) review of bid documents .17
7.4.4 Construction phase introductory meeting .17
7.4.5 Checklists .17
7.4.6 Building enclosure maintenance manual .17
7.4.7 Construction phase BECx program tasks.17
7.5 Occupancy phase .20
7.5.1 General.20
7.5.2 BE assembly maintenance manual .20
7.5.3 Facility staff training .20
7.5.4 Ten-month warranty review .20
7.5.5 Building enclosure monitoring/on-going commissioning .20
7.5.6 Building enclosure continuing facility requirements (CFR).21
7.5.7 Final (updated) BECx report .21
Annex A (informative) Building enclosure risk factors .22
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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on the ISO list of patent declarations received (see www .iso .org/ patents).
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expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use
in the built environment, Subcommittee SC 3, Thermal insulation products.
A list of all parts in the ISO 21105 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2019 – All rights reserved

Introduction
This document is intended to provide a performance verification process to achieve a durable building
enclosure that performs in accordance with the contract documents and owner’s project requirements.
The process described in this document will assist in developing the building owner’s project
requirements, defining system performance and acceptance attributes, design and construction
activities and verifying the installed performance. This process forms the basis for the occupancy
and maintenance guide to enable future users and maintenance personnel to maintain the building
enclosure, in addition to considering future modifications to the building enclosure.
The commissioning process is developed on behalf of the owner. The process facilitates the owner’s
transfer of their expectations for the building to the design and construction team. The process is
founded in collaboration among all parties comprising the commissioning team. The commissioning
process is the most successful when the owner takes an active role in the process. This document
engages the owner in commissioning by defining the tasks associated with the process that specifically
serve their needs and add value to the project.
In addition to this document, the following documents are planned to be developed in the future:
ISO 21105-2, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 2: Foundation: Waterproofing, Vapour Barrier and Insulation
ISO 21105-3, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 3: Above Grade Opaque Wall Areas
ISO 21105-4, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 4: Fenestration
ISO 21105-5, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 5: Horizontal Waterproofing
ISO 21105-6, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 6: Roofing (steep slope roofs, low slope roofs, vegetated), including insulation and
vapour barrier (as required), HVAC equipment enclosures, roof curbs, elevator penthouses, etc.
ISO 21105-7, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 7: Sloped Glazing, (skylight, canopy, etc)
ISO 21105-8, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 8: Interior Partitions providing environmental air barrier separation (such as
infection control rooms, laboratories, etc.)
ISO 21105-9, Performance of buildings — Building enclosure thermal performance verification and
commissioning — Part 9: stairwells, elevator chases, mechanical pipe chases that penetrate the enclosure,
overhead doors/ rolling doors and contiguous interior space providing environmental air barrier separation
(such as vestibules, loading docks, etc.)
ISO 21105-10
...