Basecase Building Envelope

Our project is G+3 factory building and it is a major renovation and we are renovated wall, window, HVAC equipment and we consider ASHRAE 90.1.2007 Building envelope for base case & renovated building envelope for proposed case now the LEED reviewer ask to consider the existing building envelope before renovation for basecase and renovated building envelope for proposed case 1. What is the wrong in considering the ASHRAE 90.1.2007 building envelope for Basecase (Additionally we have more saving in HVAC or considering existing building envelope before renovation for basecase but we don't need that advantage ) 2.please advice how to address below review command for the above situation Review Comments "it does not appear that the existing envelope conditions prior to retrofit were modeled consistent with the requirements of ASHRAE 90.1-2007 Table G3.1#5(Baseline)(f). For all envelope assemblies located in spaces that were conditioned prior to retrofit, model the Baseline Case envelope U-factors, SHGCs, and F-factors using the existing conditions prior to retrofit. Ensure that separate reports are provided for the existing renovation versus new construction envelope assemblies in the Table 1.4 spreadsheet for both the Baseline and Proposed Case and clearly identify the existing assemblies where energy efficient renovations have been made."