Where no high grade aggregates will be used in a refurbishment scheme project, this credit is not applicable and will be filtered out of the assessment.
This CN supersedes CN ‘Aggregates in existing applications’, currently on the technical manual, as its applicability to the RFO schemes has been reviewed. The CN was developed for the New Construction schemes to account for situations where, for example, existing foundations are re-used in-situ, thus avoiding the need for new high grade aggregates. In the RFO scheme, existing structural elements are generally retained, therefore it would not be appropriate to account for the aggregate within these.
25/10/2016 Clarification on the N/A of current CN 'Aggregates in existing applications' added.