Hartwell & Finch
Journal

Process · 5 min read

The art of steam bending

How heat and moisture let us shape fluid, continuous curves without breaking the grain.

Steam bending is one of the oldest ways to make a curve in solid timber. The method is simple to describe and tricky to master: heat the wood in steam until the lignin softens, then bend it around a former before it cools.

Choosing the timber

Not every board will bend. Straight-grained ash and oak are ideal, with no knots or run-out in the fibres. We select boards individually and test a sample from each batch.

The race against the clock

Once the timber comes out of the steam box we have around a minute before it stiffens. Everything, from clamps to former, is set up in advance so the bend happens in one smooth movement.

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