It was useful to hear about the benefits of solar thermal heating from a neutral source and about the design problems of earlier double glazing.
Only one house we visited was doing any water recycling and they were recycling grey water rather than harvesting. Interesting too to see too how people are putting in place fixtures for further development.
Meanwhile the basement is starting to take shape. we now have footbridge across to the garden, and at long last I have trained our cat Mille, to cross it (she suffers from vertigo and get panicky when crossing).