NHBC Standards 2024 Chapter 4.6 ‘Engineered fill’ – transitional arrangements

January 2024

Effective from 1 January 2024, any new earthworks tender required to support building foundations where NHBC warranty will be requested, must comply with the requirements of Chapter 4.6. 

From 1 January 2024, all earthworks required to support new foundations will be assessed against the new chapter’s performance standards on a site-by-site basis. This is applicable to earthworks tenders signed before 1 January 2024 - ie, ongoing earthworks or those already completed. Assessment will be based on demonstrating compliance with the performance standards of the chapter.

From 1 January 2025, all new foundations on engineered fill will be expected to fully comply with the requirements of the new chapter. In this regard, the new guidance should be used in demonstrating compliance with the performance standards.

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Any technical information contained on this website is produced by NHBC as guidance solely for all our builder customers as to how to interpret the technical requirements in relation to the warranty cover provided by NHBC under its Buildmark, Buildmark Choice, Buildmark Link, Buildmark Solo, Buildmark Connect or any similar product from time to time. It has not been created or intended for distribution or use outside of that purpose. The technical information contained on this web page does not constitute advice and is not to be relied upon by any third party. Nothing on this web page is intended to, nor should it be taken to, create any legal or contractual relationship. Any third party who chooses to rely upon the information contained on this web page shall do so entirely at their own risk and NHBC accepts no duty of care or liability, however caused, in connection with its use or reliance by any third party.