Removing Int D/G sealed unit Bead or Gasket first?

[minermick]

I`m about to replace the internally beaded window in the bottom panel of our front door with a plain insulated panel. I`ve got all the tools etc that i think i need but i`m unsure if its best to remove the internal black gasket first or the uPVC beading.
Any advice please?

 

[minermick]

Sorry to bump but i`ve got the first bead off and the gasted is attached to it so i think i`m ok.

 

[crank39]

If its internally beaded the nowadays it'll be a co-extruded bead (bead and gasket as one), the outer gasket will either be a sightline clip in gasket or co-extruded also, either way leave it in and just flick out the beads.

You may find the dgu you took out the bottom was packed in a way thats called 'toe and heeled', if so try and put it back the same way as this supports the door and stops it from sagging like a garden gate would if you removed the diagonal brace, if it was just sat on 2 packers on either side then its not being used as a support so its ok to refit fit it as it was