Packing with Fixing Lugs/Cleats/Clips/Straps

[MortarThePoint]

Different people seem to interchangeably call them fixing lugs, fixing cleat, fixing clips and fixing straps, but they all seem to be the same thing which is a piece of metal clipped and/or screwed to the side/bottom/top of the frame which then gets screwed to the structural reveal. One installer I spoke to thought the standard ones (1mm to 1.5mm thick) weren't substantial enough so uses 3mm joist straps which he cuts to size. I digress.

 

It's obvious how you pack a frame when you are using the 'screw through frame' mounting method, but how do you do it when you are using fixing lugs? Do you just squeeze them in and then silicone them in place?

 

I have Cavalok cavity closers so the windows sit mostly over that, with perhaps 15-20mm extending out exterior of that. That 15-20mm is where the Compriband TP600 / Bloco 600 / EXP6 is going to form my weather seal. So ultimately the packers need to go between the window frame and the Cavalok cavity closer. Hmm, hope there isn't too much movement to the Cavaloks! Should I use a glazing shovel to pry the gap open slightly and squeeze the a packer in?

 

Frame packers are different to gazing packers as they are U-shaped designed to go around the through frame screw. That seems less relevant when the screw is elsewhere.