This is a typical outside corner. The half lap will go in the other direction on alternate rows. The groove in the center of each timber accomodates a plastic lock spline that holds each timber in place until it is spiked, and also serves as an additional seal. A strip of adhesive rubber gasket is run along each side of the lock spline before the next timber is placed. Once all of the timbers are in place, this corner will be capped on the outside with trim boards.
Flashing is an often overlooked but important part of the job.
The special preformed flashings are included with the Enertia kit. Here you see the flashing which covers the top of the foundation insulation. There is room to cover the insulation with a finish material later in the job. The top flashing in the picture is nailed onto the subfloor before the first timber is put down. The flashings are custom made to accomodate stone work over the band.