On Fri, 6 Dec 2013 05:01:09 -0800 (PST), wrote:


1) The door is slightly (2cm) too short. Is there a way of making it
taller (e.g. gluing a strip of wood to the bottom). Or would making the
door frame slightly shorter by attaching some wood to the header work
better?

Bit's on the bottoms of the doors won't be noticeable. Sticking bits
to the frame at the top may well look odd as the thickness of
sections of architrave varies around the door.

2) What kind of door hardware do you fit to that kind of door?

Bi-fold door set. Runner that fits to the top of the frame that takes
a slied attached to the outside top of the door and two pivots for
the top/bottom of the inside end of the door. A bi-fold set will only
allow the door to go to 90 deg when open.

Recessed handles for the inside bit when folded closed? Knobs on the
outside either side of the fold?

Yes but probably not both sides outside as the one against the wall
will stop the door going right against the wall. See above though you
may have a bit of clearance with only a 90 deg opening, skirting etc.

Roller catch to hold it shut?

Won't need it with a bi-fold set the door can't swing like a
conventional door, it folds and slides.

--
Cheers
Dave.