Originally Posted by
addo
Sounds like either the doors are intended to be rebated onsite (unusual!) or are not weatherproof...
The deck should cede to the doors/threshold, as they are likely to last beyond reinventions of the deck in many cases.
My install would vary from DD's by assembling the jamb set (including cutting hinge rebates) and threshold first, then checking for square as a unit, bracing off with a couple of diagonal scraps, and levelling/installing. Never fix through the head; it should "float" below the frame or masonry.
If the door is exposed to weather (I get the feeling it isn't, but anyway...) make sure head and sill flashings are fitted as per your BCA.
Then you mock up the doors one at a time, to get them dialled in for square and hinge positions set out. Remove and rebate, taking care not to overcut on the depth - a decent rule of thumb is a hair past leaf thickness. If you have three hinges, expect that the middle one will need some adjustments to its position, as it must be on the same pin axis as the other two - check with a long straightedge.
Fit the doors up, and examine what's happening where they hit in the middle. Adjust to the thickness of about a 20¢ coin gap (when unpainted), remembering that they swing in an arc and the mating faces are therefore not intended as dead square.
Finally (OK, not finally!) fit the appropriate lockset, top and bottom concealed bolts and make sure this exercise doesn't compromise the door's structure (IE; see you boring through 90% of a tenon).
Now remove the doors again and prime behind every rebate and into every drill-hole with the sealer of chice (Penetrol for me). You're pretty right now to reinstall and finish off.
Regards, Adam.