Can anyone advise on how I can remove the double glazing unit shown in these pictures? There seems to be a removeable white plastic bead on the outside, but it doesn't seem to want to come out when force is applied with a paint scraper as shown. There's a black rubber seal between the beading and the glass on the outside. There's also a black foam seam between the fixed inside frame and the glass - it's not clear whether it is self-adhesive, or just pushed into place. I've bought a reel of sticky foam glazing tape just in case.
Do I need to cut out either the rubber seal or the foam seal before the beading can be removed? Should I remove the vertical or horizontal beading first?
and push the glass back into the frame, this 'unlocks' the external glazing bead and allows them to be lifted out of their grooves in the frame.
If the beads still refuse to 'lift', just push them back towards the glass to release them from the frame.
When refitting, put the glass into the frame and push it back, insert the beads and pull these forward in their grooves, go inside, push the glass forward and refit the rubber bead to 'lock' everything in place.
What you're doing looks correct. You have to push it towards the glass by about 1/2mm before it will disengage from a groove in the frame and come out. Use pressure to compress the rubber seal and the foam seal to get the 1/2mm play. Might want to wear leather gloves too, just in case you break the glass or stab yourself with the scraper.
That's fixed to the beading.
It will be glazing tape - double-sided sticky. Stops the glass being removed from the outside, and used for about 10 years now.
No.
Yes.
No, you cut through it after removing the beading. I suspect if you start mangling it before removing the beading, the resulting extra thickness would make removing the beading much harder.
Depends how the corners are mitred. If they're clean 45 degree cuts, it doesn't matter. I would do top last, so there's something holding the glass until last moment. Sometimes, they're profiled so one piece fits over the other. When I've seen this, the verticals are over the horizontals so verticals have to be removed first, but I don't know if this is universal.
You'll need someone outside preventing the glass falling outwards after you've removed the beading, and you're on the inside working on the glazing tape. I've seen it suggested to poke a cheese wire through the foam from inside to outside, and then the inside and outside person each grip one end, and pull it round the unit. This may well bugger up the seal around the glass edge, if you are planning on reusing it.
You'll then need to clean the remains of the glazing tape off the frame, and the glass if reusing it.
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