Adjusting uPVc Door

[MrIncredible]

My Back Door has dropped a little and is now rubbing on the floor.
Its a upvc door with three hinges.
The three hinges each have three adjustment points (with the use of a alum key)
Top, Bottom and the side.
which one should i be adjusting to heighten the door?
Its only about a milimetre
Thanks in advance

[The Builder]

There shouldn't be any need to raise the door on the hinge side Mr Incredulous .... usually the door just needs putting back to vertical. I guess it's catching on the lock side?
Use an Allen key on the top hinge to make the door closer to the hinge jamb......... at the same time, adjust the bottom hinge to move the door away from the hinge side.
If necessary ............. adjust the middle one to move closer to the hinge jamb
............... then keep fiddling ............ good luck

[modeller]

Does it face south ? Is the door exposed to sunlight ? That can be the problem, expansion of the upvc and it may not be possible to adjust it enough.

[BillyBB]

Often the whole door goes out of square. The panels or glass then need to be removed and repacked. Look at the weld seams, check they line up with the ones on the frame or are equal both sides if dropped.
Sounds like you have flag hinges, there are hundreds of different ones. Just experiment to find if it's the top or bottom, one will raise/lower and the other be eccentric to get in/out side to side. Try to keep the height equal on all rather than have it hanging on just one.

[BillyBB]

Top or bottom of EACH hinge, not top hinge or bottom hinge.