Using unbound incinerator bottom ash aggregate in construction: RPS 325
Environment Agency regulatory position on using unbound incinerator bottom ash aggregate (IBAA) in construction.
- From:
- Environment Agency
- Published
- 20 May 2026
- Last updated
- 24 June 2026 — See all updates
Applies to England
Documents
Details
This regulatory position statement (RPS) does not change your legal requirement to have an environmental permit for a waste operation and groundwater activity when you use IBAA in:
-
building a road, cycleway or pathway sub-base
-
building a structural platform
-
pipe bedding
However, the Environment Agency will not normally take enforcement action if you do not comply with this legal requirement if you meet the requirements in the RPS.
The regulatory position does not apply to any other legal requirements.
Updates to this page
-
24 June 2026
In the 'Things to note' section we have removed 'road or pavement' from the examples of a structural platform.
-
2 June 2026
Updates to conditions in section 2.1 'All uses': removed the condition that said you must not store or use IBAA within 25 metres of a water course; clarified the condition that you must not use IBAA underneath any residential building or garden.
-
20 May 2026
First published.
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Source
https://www.gov.uk/government/publications/using-unbound-incinerator-bottom-ash-aggregate-in-construction-rps-325Document officiel chez le régulateur. Citez toujours cette URL — et non la page de détail Vantage — dans les preuves de conformité.