This is part 5 of my Nova Scotia build series. Catch up on Build Update 4: Framing the Small Shed if you missed it. --- Prepping Before Roof Trusses One air barrier detail that I learned from another passive house blog (I believe the excellent Kimchi and Kraut blog) was to flip a piece of Zip upside down on top of the top plate, to add space for Zip panels on the underside of the ceiling. This keeps the air barrier going along the ceiling without much effort, and makes it easy to tape when you’re ready to close the ceiling. --- Continue to Build Update 6: The Theory of Passive Houses & Larsen Trusses → You can see the detail here: !Upside-down Zip around the top plate to form the air barrier !Upside-down Zip around the top plate to form the air barrier !Upside-down Zip around the top plate to form the air barrier Since our small shed is 8x12, this was very easy, as I used 3 4’x8’ Zip sheets, cutting out the middles to install later. I realized later on that this is only really helpful ...