I've started the last large sub-project: building the exterior stud frame. The idea here is to construct a non-structural frame which provides space for insulation as well as windows and door framing.
I started by lag bolting 4x4 beams to the sill plates. This provides a strong and stable ledge upon which the rest of the stud frame can sit. I fear that unless there is a super stable ledge like this, the exterior frame might sag over time.
The studs are on 24" centers. The first part of the exterior frame extends from the 4x4 ledge to a plate which sits at approximately the same height as the tops of the interior 4x7 girts. This wraps around the entire cabin, uninterrupted except at the door opening.
Once the window framing is in place, I will cut out window openings.
It is slow going. Its going to take me several full days to complete this process and do it right. However, I am excited to finally get the window openings framed so that I can cut out the openings and get a lot more light into the cabin!
I will infill the studs with insulation and cover with either 30# roofing felt, Tykvek, or both. I'll place horizontal 1x4 nailer over that and then put up the board and batten siding over that.
Simultaneous to all of this work, I've restored three large picture windows that I salvaged when we performed a house remodel in 2005. This restoration involved scraping glazing and paint, re-glazing the windows, replacing glass panes, and painting the windows. I find window restoration to be miserable work, but I think the old windows will look perfect in this cabin.