Hi guys

I am struggling to find glazing bars to do my conservatory roof.
Following suggestions I will be using glass and not polycarbonate.
However glazing bars for polycarbonate are available at B&Q, Wickes etc
only for 10mm polycarbonate. What size glass should i be using and
where can i buy the appropriate glazing bars? The minimum glass
availability from my local place is 4-6-4 ie 14mm.

Thanks for any help in advance.