I was under the impression that a cavity lintel acted as its own cavity tray. But, whilst looking around at plastic weep vent options I've noticed that some diagrams seem to show a cavity tray over the top of the lintel. Why would this be required?
e.g. http://acier.thekeystonegroup.co.uk/lintels/standard-lintels/extended-range/weep-vents
I intend using full fill cavity insulation, in case that has a bearing.
Thanks
Gary[/url]
e.g. http://acier.thekeystonegroup.co.uk/lintels/standard-lintels/extended-range/weep-vents
I intend using full fill cavity insulation, in case that has a bearing.
Thanks
Gary[/url]