"IJH" wrote:
Hi,

i have a set of regular opening upvc patio doors atthe rear of my house
and it appears that the hinges need some adjustment.

Looking from the inside you can see the door isn't hanging level and there
is a pronounced gap around the top adge where you can see daylight at the
right angle.

Looking at the hinges from the outside they appear to have a 4mm hex key
adjusting screw of some sort, i've tried winding it in somewhat with a
little sucess.

Is there any method to this adjustment? and is there any further adjusting
i can do with them?

If it's not the hinges it might be that the frame is out of alignment and in
need of toeing and heeling. See
http://www.doubleglazing.com/diy_toeing_heeling.htm