Look here to see a video of a greenhouse with solid opaque insulation on a north wall/roof and bubble insulation on the south side. The structure also looks very advanced. However we know that it is not a good idea to have opaque insulation on the north, because of loss of too much light during summer. Also what is shown is a method of bubble injection into the cavity (from outside the cavity), which will not control bubble quality or permit renewal or removal of bubbles. However, that said I am really pleased to see one more bubble greenhouse happening. In Norway our priority project is held up with construction permit delay. So, I hope to see a couple of other sites moving forward.
Did you mean to refer to this video? -- Usa2k
Yes, that is the video - thanks Jim - I post this to the Yahoo Forum and we can have a discussion there or here, at the SolaRoofWiki