In australia they actually call this stage the lock up while the interior trim work is called a fix.
Roof dry in.
Roof dry in flashing and underlayment.
What is dry in.
For slopes lower than 4 the overlap is 18 inches half the width of the roll.
Building dry box or dry in should include at least the following the structure is complete or if necessary temporary structural supports may be in place sufficient to permit interior.
Drying in for better lack of a term is making a house impervious to the rain or short for dry inside.
The roof sheathing is installed and a roof covering permanent or suitable reliable temporary roof waterproof.