The Medway Handyman wrote:

On 03/05/2013 10:55, Tinkerer wrote:
Andrew Gabriel wrote:

In article ,
Mrs Bonk writes:
I have French doors and get the same. I work afternoons and dare
not open the doors in the morning as the sun hits them then I
can't lock the door to go to work.
On mine it is the bolt on the one door hitting the lock hole in
the central bit. I removed the offending brass section housing
the "hole" I still have two working bolts ( this probably
voids my insurance) I have the same on the back door this time
I had to remove two brass housing strips ( dunno the correct
name) I fitted two other security bolts instead. I did intend
to replace everything but moving it about eighth of an inch
however, did one which worked, then when the door cools- it
doesn't bolt lol. I did file one down and that worked but
couldn't file enough of the other one.

Check to see if the door has dropped by measuring the two
diagonals top to bottom corners. They should measure the same,
and if they don't, the door has dropped due to incorrectly
fitting the glass and/or panels in it, without healing/toeing
them. Very common, because the fitters often don't understand the
process, and it takes a while to fail after they've gone.
(Can also do the same check on the frame opening to make sure it's
square too.)

Thanks Andrew. I will carry out those checks. In answer to your
earlier question the locking mechanism works fine when the door is
open so I take it that it is either fouling at one of the points
where it latches into the "fixed" door or where it bolts into the
top or bottom of the frame. It sounds as if I am not the only one
to experience this problem. Fortunately it is only the porch,
there is still a sturdy old fashioned wooden front door behind it.

You can adjust the hinges on most uPVC doors (assuming they are).
Look for a 'prize off' blanking cap & you should find a hex socket
screw.

Thanks, I didn't know that and they are indeed a pair of UPVC doors.
Now I am waiting for sunshine again so I can start checking things out.

--
Tinkerer