I’ve posted about the Passive House Diary before. Bill Butcher of the oddly named Green Building Store is cataloguing their construction of a single family house in the UK (Yorkshire, to be specific) to the German Passivhaus standard. They’ve progressed significantly and are now making the structure truly airtight, one of the major differences between this sort of project and standard construction. I am amazed by the detail Butcher delivers in his diary entries. The latest is here. If you haven’t been following the diary you can begin here.