3-4mm clearance is what you usually need, Its a fiddly job getting everything to line up right and a case of elimination to work out what is the problem. You could try taking out all the keeps and refitting them 1 at a time untill you know whats catching.
Maybe its worth finding a firm that supply's and fit?
I personally always do a good rate to builders as new build with no making good is a lovely easy job.
Maybe its worth finding a firm that supply's and fit?
I personally always do a good rate to builders as new build with no making good is a lovely easy job.