strat neck height

I received a strat kit as a gift and, after assembly and setup, any attempt to play above the 12th fret can't be done.The strings are all the way against the frets. I've checked out my son's Starcaster and the neck is at least 1/16" lower than mine.Is there a set height for the face of the neck above the body and, if mine is too high, how can this be fixed?