When cutting the siding for this little model, I overlapped the edge about 1/4 inch to make the siding meet at the edges of the box. The windows are trimmed inside and out. I added a tidy and stabilizing trim to each corner. The trim boards are 1/4 inch taller than the walls in order to hold the roof, which will eventually be made when I figure out just what it is I've built here.
Is it a Japanese Temple? Is is a Presbyterian Church in Tokyo? Is is a tower in an English woods?