Where Part 1 is not being assessed, improvements to the performance building fabric cannot be recognised, whether these be designed or consequential. In order to fully recognise the services efficiency improvements, however, where changes to the building fabric have been made, the post-refurbishment elemental U-values should be used for both pre-and post-refurbishment.
Where a project seeks recognition of improvements to the performance of the building fabric, this must be assessed against Part 1.
