Why Does Solid Timber Move?

Why Does Solid Timber Move?

Your solid-timber table can change even after it has been made perfectly.

That sentence can sound alarming until you understand what timber actually is.

A tree can be felled, seasoned, machined, joined and finished, but the material does not suddenly stop interacting with the world around it. Solid timber continues responding to changes in atmospheric moisture throughout its life.

That isn't automatically a defect.

It is one of the fundamental characteristics of real wood.

Timber is still responding to the room

Wood is hygroscopic, meaning it exchanges moisture with the surrounding air. As relative humidity changes, the moisture content of the timber moves toward equilibrium with its environment.

That matters because changes in moisture content can create dimensional change. Timber does not simply remain at precisely the same dimensions regardless of whether it is living in a humid subtropical climate, an air-conditioned apartment or a heavily heated interior.

For furniture intended for different parts of the world, this is an important design consideration.

It doesn't move equally in every direction

Timber's behaviour becomes even more interesting because its dimensional movement is not uniform.

Movement across the grain is considerably more significant than movement along it. Grain orientation, component width and the way parts are connected therefore matter when furniture is being designed.

A broad solid-timber tabletop deserves different consideration from a narrow rail or leg. Where timber is joined to another material with different dimensional behaviour, the connection also becomes important.

The goal is not to eliminate every possibility of natural movement.

The goal is to understand it well enough to design responsibly around it.


What does this mean for the person who owns it?

It means natural timber should not be judged by exactly the same expectations as an artificial sheet material.

Seasonal movement can occur. Grain and colour vary from one piece of timber to another. The surface will develop with age and use. Environmental conditions inside the home can influence the material.

None of that excuses poor manufacture. There remains a clear difference between appropriate natural behaviour and an actual manufacturing problem.

But understanding the material makes that distinction easier to recognise.

Why use solid timber if manufactured materials are more uniform?

Because uniformity isn't the only measure of quality.

Real timber carries grain, texture, growth and natural variation. No printed surface needs to tell the story on its behalf. Scandinavian furniture houses such as Carl Hansen & Søn and PP Møbler, Japanese makers including Karimoku and Ritzwell, and contemporary manufacturers such as De La Espada approach timber differently, yet each demonstrates what becomes possible when the material itself is allowed to contribute to the design.

At John Leighton, this is central to why we work with solid timber.

We don't want nature to become perfectly repetitive.

We want to understand it well enough to let its differences become part of the piece.

Designed to Endure.

John Leighton

FURTHER READING

WoodSolutions — Australia
Technical information on timber moisture, movement, species, design and specification.
woodsolutions.com.au

Responsible Wood — Australia
Information relating to responsible forest management and timber certification in Australia.
responsiblewood.org.au

Carl Hansen & Søn — Denmark
A longstanding Danish furniture house with deep expertise in solid timber and craft.
carlhansen.com

PP Møbler — Denmark
An exceptional reference for cabinetmaking, timber and the continuing production of significant Danish designs.
ppm.dk

Karimoku Case — Japan
Contemporary Japanese furniture combining timber craftsmanship with international architecture and design.
karimoku-case.com

De La Espada — Portugal / United Kingdom
A strong contemporary reference for substantial solid-wood furniture and craft-led production.
delaespada.com

John Leighton is not affiliated with the external studios or publications referenced above.

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Styling News explores the questions that come up when choosing furniture, materials and the way they work within a home. If there is something you would like us to explain in a future article, we welcome the conversation.

At John Leighton we design furniture around natural material, considered form and the belief that the pieces we live with should have a reason to remain.

 

 

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