Awhile ago I put up an accent shiplap wall for Janice and Dale; they called and wanted another one. I measured the wall, then picked up the MDF shiplap and left it with them to paint, and to acclimatize to the house as well for a few days. Later I came back to install it.
This is an exterior wall with a built-out area where the foundation wall meets the windows. The issue with shiplap here was that you could see the top of it when it reached that transition. My solution was a small bar/shelf that covered it a little bit.
handyandrew.ca 