What is Oak, European and American?
The Wood Guide · Choosing and comparing
ComparisonEuropean and American oak
The same tree name, three different species and three different woods. The difference matters most when you want to use the wood outdoors.
- Quercus robur / petraea
- Quercus alba / rubra
- Red oak can't go outdoors
European and American oak
The same tree name, three different species and three different woods. The difference matters most when you want to use the wood outdoors.
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The oaks in brief
Oak comes from trees of the genus Quercus, which grow in the northern hemisphere, mainly between the 45th and 50th parallels.
In Europe that growing zone lies a little further north because of the maritime climate; in North America a little further south because of the continental climate. The common species are European oak (Quercus petraea and Quercus robur), American white oak (Quercus alba) and American red oak (Quercus rubra).
The crucial difference lies not in the colour but in the vessels. White oak — both European and American — has its vessels blocked by tyloses, a kind of natural plug. Red oak does not: its vessels are open.
Those same tyloses make white oak watertight. A cask made of red oak literally leaks — you can blow through it. That is not folklore but the reason every whisky, wine and cognac cooperage in the world uses white oak.
- European oak
- Quercus petraea, Quercus robur
- American white
- Quercus alba
- American red
- Quercus rubra
- Colour, European
- light to golden brown, pale sapwood
- Colour, American white
- light brown to beige, more even
- Colour, American red
- pinkish red to light brown
To be fair: red oak is regularly sold as "American oak" with no further description, even though it doesn't hold up outdoors or in damp applications. Ask explicitly for white or red — it makes years of difference in service life.
The three species compared
| European oak | American white | American red | |
|---|---|---|---|
| Botanical | Q. robur / petraea | Q. alba | Q. rubra |
| Heartwood colour | Light to golden brown | Light brown to beige | Pinkish red to light brown |
| Figure | Flame figure when flat-sawn, pronounced ray fleck when quarter-sawn | Calmer, more even | Coarser, more open |
| Vessels | Blocked by tyloses | Blocked by tyloses | Open |
| Durability class | 2 | 2 | 4 |
| Usable outdoors | Yes | Yes | No |
| Tannin content | High | High | Lower |
Quarter-sawn oak shows shimmering "ray fleck" — cut medullary rays that light up as pale patches. They are most pronounced in European oak, and they are the hallmark of classic oak furniture.
Which oak for which job
Outdoors or damp
European oak or American white oak. Both class 2, both with blocked vessels. Red oak is ruled out.
Classic furniture with character
European oak, quarter-sawn, for the ray fleck.
Clean, even-toned interior
American white oak — calmer in figure and more even in colour, which makes a large surface look calmer.
Indoor floor with a warm tone
American red oak. Indoors the open vessel structure is no drawback, and the pinkish-red undertone is a plus.
The high tannin content of oak reacts with iron and causes black stains. Use stainless steel or galvanised fixings, especially outdoors — an ordinary screw leaves a black ring within a few weeks.
Frequently asked questions about European and American oak
Can American red oak be used outdoors?
No. The vessels are not blocked by tyloses, so water soaks in freely. Red oak is in durability class 4 and belongs indoors.
What is ray fleck in oak?
Cut medullary rays that light up as shimmering pale patches on quarter-sawn wood. They are strongest in European oak — the hallmark of classic oak furniture.
Is American oak cheaper?
Usually, yes, thanks to larger and more standardised production in North America. European oak is scarcer and has a more pronounced figure.
Which oak for a garden table?
European oak or American white oak, both class 2. Use stainless steel fixings — the tannins in oak cause black stains with ordinary steel. See also what is oak.
The oaks in perspective
One name, three species — and one that can't go outdoors.
Have a question about your project? Just ask — we're happy to help.
Photos via Wikimedia Commons: Quercus robur — Philipp Zinger, CC BY-SA 4.0 · Quercus alba — Philipp Zinger, CC BY-SA 4.0 · Quercus rubra — Philipp Zinger, CC BY-SA 4.0