ecmk has produced guidance to help members understand the use of U-Values in relation to RdSAP conventions and ECO4 lodgements for EPCs and ERPs.
This guidance supports the TrustMark EPR Conventions 2.01:
Overridden u values will not be accepted as permissible, unless via prior agreement with the scheme provider on receipt of suitable confirming validated evidence.
Where agreement is provided, the post equivalent u values in the post EPR must be calculated based on the u value of the pre EPR and the thermal resistance of the insulation product installed.
For further reference please see RdSAP Conventions 3.08.
To request permission to overwrite U-Values, members must email firstname.lastname@example.org with the completed U-Value Permission Form and any supporting documents and evidence before lodging.
For further advice, please get in touch with the ecmk team prior to lodging. Contact us on email@example.com | 0333 123 1418.