Updated June 10, 2026
Before choosing a joint, decide what the joint must do: resist racking, hold a panel flat, or carry a shelf load. The answer narrows the options quickly. Solid wood expands and contracts across its width with changes in moisture content, and almost none along its length. Every durable joint either accommodates that movement or is small enough that movement is negligible.
Mortise and tenon
The mortise-and-tenon is the workhorse for frames: chair legs to rails, doors, and table aprons. A tenon glued into a mortise gives a large long-grain-to-long-grain gluing surface, which is where wood glue performs best. Aim for a tenon thickness near one-third of the stock, and size the shoulder so it seats fully and squarely.
Where it fits
- Frame corners that must resist racking.
- Connections where a mechanical shoulder hides any seasonal gap.
- Joints you can clamp square while glue cures.
Dovetails
Dovetails resist being pulled apart in one direction, which makes them the traditional choice for drawer fronts and casework corners. Cut by hand, they reward patience: mark from a knife line, saw on the waste side, and pare to the line. The interlocking geometry carries load even before glue is applied.
Practical detail
For drawers, cut half-blind dovetails at the front so the joint does not show on the face, and through dovetails at the back where appearance does not matter. This keeps the visible front clean while keeping the stronger joint where it is seen least.
Housing joints (dados)
A housing joint sets a shelf into a groove cut across a side panel. It carries vertical load well and locates the shelf precisely. Because the shelf and the panel often run with grain in different directions, glue the front few centimetres only and let the rest float, or the panel may split as it moves seasonally.
Choosing by movement
| Joint | Best for | Movement note |
|---|---|---|
| Mortise & tenon | Frames, rails, legs | Shoulder masks small seasonal gaps |
| Dovetail | Drawers, case corners | Keep boards close in grain orientation |
| Housing / dado | Fixed shelves | Glue front only; let panel float |
None of these requires power machinery. A backsaw, a chisel set, a marking gauge, and a square will cut all three. The tool guide covers what to buy first.
References
- Forest Products Laboratory — Wood Handbook, on wood movement and moisture content.
- Wikipedia — Woodworking joints, for joint terminology and overview.