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What is driftwood?

The Wood Guide · Calculating with wood

Wood knowledge

Driftwood

Wood carried along by rivers, lakes or seas and washed ashore. Its smooth, silver-grey look is the result of years of water, sand, sun and wind.

  • Silver-grey patina
  • Months to years
  • Salt stays in it
washed-up wood
Silver-grey driftwood: soft parts worn away, hard fibres in relief (Île-aux-Moines, Bretagne)
Silver-grey driftwood: soft parts worn away, hard fibres in reliefÎle-aux-Moines, Bretagne
Driftwood washed up on the beach, bleached by sun and salt
Driftwood washed up on the beach, bleached by sun and salt
In pictures · Driftwood1 / 6
Chapter 1 · The species

Driftwood

Wood carried along by rivers, lakes or seas and washed ashore. Its smooth, silver-grey look is the result of years of water, sand, sun and wind.

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Summary

Driftwood in brief

Not a wood species but a condition: any wood can become driftwood if it stays in the water long enough.

It starts as a tree, branch or piece of timber on land. Erosion, storms or floods carry it into the water, or it breaks loose from a building project, an old jetty or a shipwreck. Historically, timber was transported by raft; pieces that broke free became driftwood.

What happens next is a slow transformation. First the wood becomes saturated with water, the bark comes away and the soft parts wash out. Then sand, stones and other floating objects do their work: they scour the wood smooth and round off every sharp edge. Sun and salt bleach the colour out to the silver grey it is known for.

Why it is so smooth

No person can sand wood like this. Millions of tiny scouring movements by sand and gravel, year in, year out, remove precisely the softer earlywood cells and leave the harder latewood fibres standing. The relief you feel is the growth-ring structure itself.

What it is
wood washed up from a river, lake or sea
Phase 1
saturation: bark comes away, soft parts wash out
Phase 2
mechanical wear from sand and stones
Phase 3
bleaching by sun and salt
Duration
months to years
Colour
silver grey to almost white

To be fair: driftwood from the sea is full of salt, and it stays in. Burning it releases chlorine compounds that are harmful and attack your stove — driftwood does not belong in the fireplace. The salt also corrodes metal fixings, so screws rust faster.

The transformation

From tree to beach find

  1. Into the waterThrough erosion along banks, storms and floods, or lost from building projects, jetties and wrecks.
  2. Saturation (weeks to months)The wood soaks up water, the bark comes away and the soft parts are washed out.
  3. Mechanical wear (months to years)Sand, stones and floating objects scour the surface smooth; sharp edges are rounded off.
  4. BleachingSun, salt and wind draw the colour out, leaving the characteristic silver grey.
Uses

What you can do with it

Decoration

The most common use: as a sculpture, wall decoration or centrepiece, just as it is.

Lamps and mirrors

Its grey, organic character contrasts beautifully with glass and metal.

Small furniture

Side tables and bookends, provided the wood is sturdy enough. Knock on it: a hollow sound means it has deteriorated.

Aquariums and terrariums

Popular, but rinse it thoroughly and for a long time first — salt is deadly to freshwater fish.

Not in the stove

Driftwood from the sea contains salt. Burning it produces chlorine compounds that are harmful to health and corrosive to the stove and flue. And with river driftwood, you never know what was once on it.

The rules

Can you take driftwood home?

Taking a small piece of driftwood from the beach is rarely a problem in practice. But the rules differ from area to area, and in some places they are strict.

Nature reserve

In protected dune areas and nature reserves there is often a general ban on removing natural materials. There, driftwood is part of the ecosystem: it shelters insects and helps stabilise dunes.

Public beach

A small piece for personal use is generally tolerated. Large quantities or collecting for commercial purposes are not.

Washed-up cargo

Wood that clearly comes from a ship or structure belongs to someone. The rule then is that you must report it to the relevant authority.

If in doubt

Check with the local council or the body that manages the area. One phone call is enough.

Quick answer

Frequently asked questions about driftwood

Can I take driftwood from the beach?

On public beaches, a small piece for personal use is generally tolerated. In protected nature reserves there is usually a ban, and recognisable washed-up cargo must be reported. If in doubt, ask the local council or the site manager.

Why is driftwood grey?

Through bleaching: sun, salt and wind draw the natural pigments out of the surface. The same happens to any untreated outdoor timber — it just goes much faster and deeper with driftwood.

Can I burn driftwood?

Better not. Sea driftwood is full of salt; burning it produces chlorine compounds that are harmful and attack the stove.

How do I clean driftwood?

Brush it off dry, rinse it for a long time in fresh water to draw out the salt, and leave it to dry for weeks in an airy spot. For aquarium use, soak it and change the water several times.

More in The Wood Guide

Driftwood in perspective

Not a wood species but a story — and the finest example of what weathering does to wood.

To The Wood Guide Caring for softwoods How wood moves

Have a question about your project? Just ask — we're happy to help.

Photos via Wikimedia Commons: Île-aux-Moines, Bretagne — Jebulon, CC0 · Driftwood washed up on the beach, bleached by sun and salt — Sheba_Also, CC BY-SA 2.0

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