I am thinking of fitting super quilt insulation to my conservatory roof and am unsure we're to drill the glazing bars to secure wooden batons to staple it to. I have read various other topics about this but no real details about the bars. I do not want to end up with leaks. I have added a photo showing profile of the bar. I think I need to drill directly below wher the round part is directly below centre bar. Any help would be grateful.
http://www.diynot.com/network/Junglej1mm/albums/
Photo loads upside down for some reason
http://www.diynot.com/network/Junglej1mm/albums/
Photo loads upside down for some reason
