I am installing a set of double doors in my bedroom doorway. I've hung
single doors before but not double and have some questions on what I
need to do. These will be 6 panel pine doors that will open into the
room. The active door will be the right-hand door (standing in the
room) and that's the door that will receive the lockset. I'm also
putting down a threshold.

My plan is to install the threshold, install a stop molding around the
jamb (there isn't one there now), put the doors in place align them and
mark the hinge locations. I'll then mortise the jamb and doors for the
hinges and mortise the side of the inactive door for the top and bottom
pins. Sound ok so far?

What do I need for an astragal? I've read that you use a "T" astragal
but then also read that all you need is a piece of molding that mounts
to the face of the active door to use as an astragal. Which is better?
If it is a "T" astragal, then this has to go on before the door is
mortised for the lockset, correct?

How big a gap should I leave between the doors?
Anything else I need to be aware of?

George