Xfeed,
Hi, I agree with Capt Claret. Normally you change to 1013.2 when cleared to a FL above Transition and that change normally occurs when close to TA - depends on your Company SOP. CAA used to advocate changing in climb immediately when cleared to FL, but several years ago reverted to 'within 2000ft of TA' iirc. Check out the following thread for more info:
Changing altimeter setting
rts