Warranty Position Regulatory Position and Guidance Exemptions Does B4 still apply?
Green indicates we consider our position best practice and not in dispute Grey items cover the December 2018 Amendments, Approved Documents and MHCLG's own FAQs and advice notes Green indicates that the item IS exempt from Regulation 7(2), in accordance with Regulation 7(3) Green indicates that B4 still applies, and refers to relevant parts
Yellow indicates our position has the potential to be subjective   Red indicates that the item is NOT exempt. Refer to Regulation 7(3) Red shows that B4 no longer applies


Warranty Position

Definition: Glass balustrades to balconies which are recessed from the face of the external wall; and that are suspended or cantilevered from an external wall, i.e. that do not form a roof to a room directly beneath them (and that do not form a means of escape).

Requirement: All glass in these balconies must achieve combustibility class A2-s1,d0 or better. Note: Currently there are no laminated glasses that can achieve combustibility class A2-s1,d0 or better.

Note: MHCLG's January 2020 update "Review of Ban on use of combustible materials…" is currently consulting on whether laminated glass in balcony balustrades should continue to be combustibility class A2-s1, d0 or better.

Is the position indisputable? Yes.

December 2018 Amendment

Section 2 Reference: 2(6)(b).

Reference titles: Specified attachment.

Approved Document

Reference title(s): Section 10.11.

References: External walls and specified attachments.

MHCLG FAQS / Advice Notes

Reference: See MHCLG video interview with LABC.

Reference title(s): Quote at 3:55 minutes into the video: “The glass in a balustrade is not in a window or a door so it would need to meet the requirements of 7.2 of either class A1 or A2-s1, d0."


Is the item exempt from Regulation 7(2), in accordance with Regulation 7(3)?: No.

References: None.

Statement: None.

If exempt, are there any restrictions on the use of the system, component or material given in the guidance in ADB vol 2: None.

Does B4 still apply?

Yes: Reference: B4-(1)

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Disclaimer: The information in this document is believed to be correct in light of information currently available and at the time of publication but is not guaranteed. Neither LABC Warranty nor its agents can accept responsibility in respect of the contents or any events arising from the use of the information contained within this site. The guidance provided does not replace the reader’s professional judgement and any construction project should comply with the relevant Building Regulations or applicable technical standards. For the most up to date LABC Warranty technical guidance please refer to your Risk Management Surveyor and the latest version of the LABC Warranty Technical Manual.