The cotton insulation is intriguing, maeve. It sure calls to mind a lot of questions that only time can answer (and some, though not all have already been raised.) speaking strictly from the peanut gallery, I don't think I would choose to be in the first, or even second wave of post-market guinea pigs for something like insulation, that is likely going to be there for the effective life of the building.

If I were considering it for environmental or ecological reasons, I'd also want to know more about where and how the cotton was grown - to know what effects the growing of it have on the environment and lives of the people where it is grown.

Thanks so much for sharing with us all the different products and ideas you are running across in your research. I learn bunches from reading this thread.