A board has a front and back. The inside of the annual ring is called the back of the wood, and the outside of the annual ring is called the front of the wood. When a board dries, the front side of the board warps into a concave shape, while the back side of the board becomes convex. Therefore, when gluing boards together, the ends of the boards are lined up in a row: wood back, wood front, wood back, wood front, wood back, and wood front. This prevents the boards from warping and curling in one direction.
We are creating online learning materials where you can learn about Japanese carpentry in English through the actual construction of the building!
It will be on sale at the kickstarter price from November 14th to December 6th, 2021, so be sure to check it out!