I'm diving into a new project and need a little push to get started on the backrest for my chair. While I'm comfy with the rest of the chair build, bending wood for the backrest is a new challenge. I'm considering using hot water and clamps to bend it overnight, but I'm unsure if that's the best route. The old chair's backrest had a very shallow curve, and I plan to cut and round the edges before bending. Any tips or tricks for bending wood effectively?
5 Answers
Instead of bending a thick piece of wood, you might want to saw out the shape from a thicker stock with a bandsaw. Just mark and cut your joints on the squared blank, then shape it, which can save you the hassle of bending.
Steam bending can be unpredictable depending on the type of wood. If you're just making one chair or a few, laminating thin veneers over a mold is a simpler and more reliable method. Veneers around 2-3 mm thick can easily follow curves, and layering them up can create a strong structure.
If bending isn't crucial for your design, consider starting with a thicker piece of wood instead. To bend wood, steam boxes are effective; I've built one using four fence pickets and a propane burner to heat water. Just ensure that your wood is long enough to fit into the bending jig, maybe double the length you need, for better handling.
Check the grain of your wood; if it doesn't follow a curve, it's likely not bent but rather cut from a larger piece. Bending requires the grain to follow the shape, so keep that in mind when selecting your wood.
To successfully bend wood, you ideally want to use steam instead of hot water. Hot water might not get the wood hot enough, plus using water can be tricky. If you're open to alternatives, you could also laminate thinner layers of wood — cutting and gluing them together might be easier than bending a thick piece.
Thanks for the advice! That sounds like a more straightforward approach.