Why is it that the subject of control joints only comes up after the finishes are completed and some cracks appear? Do you have a responsibility to install control joints if they are not clearly indicated in the project documents?
Ninety-nine times out of a hundred, the specifications will reference either ASTM C840 or GA-216 for the application and finishing of gypsum wallboard. And ninety-nine times out of a hundred, when a crack appears, the owner’s representative will bring it to your attention that control joints are your responsibility and direct that you either, fix the cracks, install the control joints per the standards and/or give a credit back for not installing them in the first place.