"keith_765" wrote in message
...


15mm turn in should carry ok, I've seen less turn in with no leak, yes I
know its recommends 25mm. One of the problems with leaking lead/brick
joints
is that the mortar is not push in to the back far enough. If you cant get
the recommended 25mm. Take out the next joint above and put an apron over
the whole lot so it covers down to the flat, cloaking the joint below.
This
will give a greater up stand.


Yes I've come to that conclusion myself now, I think that's the best
solution. It is quite possible that the problem is the joints above anyhow.
Thanks.

--
Mike W