On Thu, 25 Jun 2020 03:40:23 -0700 (PDT), jkn
wrote:

snip


I think when they did mine, they applied the tape to the glass, then
pulled a little corner of the tape backing inwards on both ends of
each length, offered the glass into the frame (with packing pieces
taped in place) and then peeled the tape off, pushed the DG unit home
and applied the bead.


Yes, an approach like that was something I was wondering about as an
alternative. The w/up liquid approach sounds a bit risky, especially as a
first-timer...

I have use the washing up liquid approach for signs etc but never on
double sided tape so I can't help you there.

When you say 'with packing pieces taped in place' - do you mean to the window
frame, or to the glass unit?

In my case they were just tacked into the frame with small bits of
tape (even at the bottom to stop them falling over when you are trying
the wrangle the DG unit in place) and once the DG unit has been seated
fully but loosely, you (they) peeled the tape from underneath itself
and finally pressed the unit in place all round, followed by the
glazing beads etc.

The key is to make sure the tape isn't already being pressed hard and
you peel it back gently and the right angle (maybe 20 Deg off right
back on itself) so it comes away nicely.

This only really works if the DS tape is 'fresh' and of good quality.
If it's got old then the paper backing can become more fragile and so
more chance of it tearing off rather than peeling back. You can always
test some between two objects and even cut the foam again if you have
to and start again.

That's why you set a tape at both ends of each leg as then you get two
goes at each. ;-)

Even if a bit does go wrong, as long as it's not along the bottom (and
probably even if it is) the DG unit isn't going to fall out or even be
pulled out (or leak water or drafts as the foam will be still creating
a seal) and there is normally a rubber seal on the external glazing
beads. ;-)

Cheers, T i m