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: Spandrel and infill panels to window, door and curtain wall systems.

Requirement: All materials and external surfaces to achieve combustibility class A2-s1, or better, unless they are exempt within 7(3).

Approved Document B states: Combustible thermal break materials should be limited in size to the minimum required to restrict the thermal bridging. (Note insulated panel and glass unit edge spacers)

Seals and gaskets are exempt (both within the spandrel panel and when used to glaze the spandrel panel into the window / door / curtain wall system).

Adhesives are not exempt. Composite spandrel / infill panels that utilise combustible adhesives will need to be tested as a 'product' and achieve a product an EN 13501-1 product combustibility classification of A2-s1,d0 or better.

Is the position indisputable? Yes

December 2018 Amendment

Section 2 Reference: None.

Reference titles: None.

Approved Document

Reference title(s): 10.15(d) and 10.5.

References: Window spandrel panels and infill panels must comply with regulation 7(2).

External surfaces. Must comply with Approved Document Vol 1 Table 10.1

MHCLG FAQS / Advice Notes

Reference: Section 9.

Reference title(s): "...panels such as spandrel panels and/or other opaque insulated panels in curtain walls are not exempted in regulation 7(3) and therefore must comply with regulation 7(2).


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

Reference: 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.