Why boards move, why they fight you, and how to design around it.
Wood was once alive, and in many ways it still behaves as if it is. A tree spent decades growing under tension and compression, and that stress is locked inside the board. Milling releases some of it. Understanding the tendencies will not make wood predictable, but it will stop the surprises from ruining your work.
The short version #
- Grain direction dictates strength, appearance, and how a surface takes a finish.
- Wood moves with seasonal moisture, mostly across its width. Design has to allow for it — slotted screw holes, floating panels.
- Internal stress is released when you mill. Cut oversized, let parts rest, then dimension.
- Buying lumber uses the quarters system: 4/4 is one inch rough, and finishes around three-quarters.
Where you will use it #
Worth reading before your first glue-up, and again before the side table. See What to Build Next.
Stuck? #
Open office hours run Wednesdays and Saturdays. Bring the project, bring the board, bring the question.
