Ok, we now have a new aluminium greenhouse (timber before) and I need to do
my annual wrapping of bubbles on it. I've seen these alliplug things that
say they are for attaching stuff like bubblewrap, and I've also seen
alliplug spacers that keep the plastic an inch from the glass. Does anyone
have any experience in this area? Are these spacer things necessary? Will
the glass get horribly condensationised (is that a word???) if I don't use
them perhaps? Will there be better insulation if I do use them? This metal
world is all a bit new to me.

TIA

--A