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© The British Standards Institution 2023

Published by BSI Standards Limited 2023

ISBN 978 0 539 19094 6

ICS 91.080.30

The following BSI references relate to the work on this document:
Committee reference B/545
Draft for comment 22/30442992 DC

Foreword

Publishing information

This part of BS 8298 is published by BSI Standards Limited, under licence from The British Standards Institution, and came into effect on 30 June 2023. It was prepared by Technical Committee B/545, Natural stone. A list of organizations represented on this committee can be obtained on request to the committee manager.

Supersession

This part of BS 8298 supersedes BS 8298:1994 and partially supersedes BS 8298‑1:2010, which are withdrawn.

Relationship with other publications

BS 8298 is published in the following parts:

Part 2: Traditional handset external cladding – Code of practice;
Part 3: Stone‑faced pre‑cast concrete cladding systems – Code of practice;
Part 4: Stone cladding on rainscreen support systems – Code of practice; and
Part 5: Traditional handset internal cladding – Code of practice.

Information about this document

To provide more consistency with other material design standards, it is the long-term goal for the partial safety factors presented in the British Standard to be derived from a reliability-based analysis in accordance with the principles of BS EN 1990:2020+A1:2005, Annex D. However, the values presented in this edition are derived from industry experience and a historical precedent of conformity and not a reliability-based analysis.

This publication can be withdrawn, revised, partially superseded or superseded. Information regarding the status of this publication can be found in the Standards Catalogue on the BSI website at bsigroup.com/standards, or by contacting the Customer Services team.

Where websites and webpages have been cited, they are provided for ease of reference and are correct at the time of publication. The location of a webpage or website, or its contents, cannot be guaranteed.

Use of this document

As a code of practice, this part of BS 8298 takes the form of guidance and recommendations. It is not to be quoted as if it were a specification. Users are expected to ensure that claims of compliance are not misleading.

It has been assumed in the preparation of this part of BS 8298 that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced.

Users may substitute any of the recommendations in this part of BS 8298 with practices of equivalent or better outcome. Any user claiming compliance with this part of BS 8298 is expected to be able to justify any course of action that deviates from its recommendations.

Presentational conventions

The provisions of this standard are presented in roman (i.e. upright) type. Its recommendations are expressed in sentences in which the principal auxiliary verb is “should”.

Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element.

The word “should” is used to express recommendations of this standard. The word “may” is used in the text to express permissibility, e.g. as an alternative to the primary recommendation of the clause. The word “can” is used to express possibility, e.g. a consequence of an action or an event.

Notes and commentaries are provided throughout the text of this standard. Notes give references and additional information that are important but do not form part of the recommendations. Commentaries give background information.

Where words have alternative spellings, the preferred spelling of the Shorter Oxford English Dictionary is used (e.g. “organization” rather than “organisation”).

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

1 Scope

This part of BS 8298 gives recommendations for the design, installation and maintenance of internal cladding and lining of natural stone held directly to a structural background by fixings with or without adhesive. It is applicable for both commercial and residential locations.

It covers four categories of construction build up:

internal cladding ≥20 mm thick, with a cavity, supported at each floor level, mechanically supported and restrained;
internal lining ≤2.4 m height, ≥20 mm thick (e.g. ≥600 mm × 600 mm to 2 400 mm × 600 mm) supported at floor level, stack-bonded, on adhesive, mechanically restrained to the substrate;
internal lining ≤2.4 m height, ≥12 mm to ≤20 mm (e.g. ≤600 mm × 600 mm), supported at floor level, stack-bonded, on adhesive, mechanically restrained to the substrate; and
ceilings, soffits and sloping surfaces with a cavity mechanically supported and restrained.

Stone held only by adhesion is not included.

It covers:

the sampling of stone for testing and production control testing (PCT);
the provisions necessary for cladding and lining to perform their function satisfactorily; and
the materials and methods most frequently used for stonework.

This document is not applicable to seismic loading or enhanced security scenarios (such as blast).

NOTE Different cladding methods are covered in the other parts of BS 8298 (see Foreword).

This standard excludes composite stone slabs, such as honeycomb-backed stone, and open internal courtyards.

2 Normative references

3 Terms and definitions

4 Stone selection process

4.1 General

4.2 Stone samples and testing

5 Designing internal cladding

5.1 General

5.2 Movement in structures

5.3 Deflection limits

5.4 Impact loading

5.5 Material strength

5.6 Factors of safety

5.7 Impact

5.8 Staining and changes in appearance

5.9 Cavities

5.10 Methods of attachment and support for internal cladding

5.11 Jointing and pointing

6 Internal lining – methods of attachment and support for internal cladding

7 Soffit and ceiling fixings

8 Installation of stone slabs of more than 12 mm and up to 20 mm thickness

9 Work practices in production

9.1 General

9.2 Sizes and tolerances

9.3 Dowel holes and mortices

9.4 Marking

9.5 Production and storage

10 Work practices on site

10.1 Permissible deviations (construction tolerances for cladding and lining)

10.2 Scaffolding

10.3 Movement and storage of materials

10.4 Fixings

10.5 Bedding, jointing and sealing of joints

10.6 Movement joints and compression beds

10.7 Inspection of finished works

10.8 Protection

10.9 Site repairs

10.10 Cleaning on completion of work

11 Maintenance

Bibliography

BS 8298-5:2023

Design and installation of natural stone cladding and lining - Internal cladding and lining. Code of practice

Current

Published:

30 Jun 2023