I agree with Mark K on this one. It is not the role of the building inspection department to dictate how this must be fixed, simply that it does not comply with the approved specifications. Certainly, the building inspector can provide guidance in how this could be fixed, but selecting the appropriate fix is ultimately at the discretion of the owner or their representative. I've been involved in situations like this where the owner was not accepting of any deviation and the contractor had to remove the defective work and replace it. It seems harsh, but the contractor paid much more attention to the plans and specs after that.