Wall Shelves in the Kitchen: How High, How Deep, and What Steam Does to Them

The kitchen is the room where wood has to put up with the most: steam from cooking, grease in the air, heat from the stove, and all of it every day. Still, many people want an open shelf there, because a wall cabinet closes the wall and a board leaves it open. The short answer first: a shelf of oiled oak works in the kitchen, with two rules. Not directly above the hob, and nowhere water is left standing. The rest is planning, and there are numbers for that.

How high above the worktop

Kitchen planners start from the working height. According to the kitchen standards of the AMK, the German kitchen industry association, the right working height is 10 to 15 centimetres below the elbow; in most kitchens that is around 90 centimetres. Above it you need room to work: the planning guide at nullbarriere.de, based on the ergonomics study of the TH Darmstadt, gives a clear distance of 40 to 50 centimetres to the worktop, 50 from a body height of 1.65 metres. That is the value for wall cabinets, and it applies to a shelf just the same: the lowest board hangs 50 centimetres above the worktop, at about 1.40 metres.

Above that, the gap between the boards decides. With 25 centimetres the second board sits at about 1.67 metres, with 35 at 1.77. Both are still within the zone you reach without stretching; whatever comes above is for things rarely needed. If you are wondering what should stand at which height, the reach zones are in the article on shelf heights.

How deep: 15 centimetres on the wall, 35 on the floor

All KUUDU wall shelves hang with half boards, 15 centimetres deep. In the kitchen that is not a compromise but the reason they work above a worktop: a 35-centimetre board 50 centimetres up hangs over the chopping board like a cabinet; 15 centimetres leave the worktop free. On 15 centimetres stand spice jars, cups, glasses, a row of paperback-format cookbooks. Anything wider overhangs, and plates do not lie at all.

Plates, bowls and supplies therefore belong on a 35-centimetre board, and that one stands on the floor: a sideboard next to the run of units, a shelf on the free wall, a lowboard under the window. Both together make the kitchen that looks so light in the photos: the narrow one on the wall, the deep one below. The kitchen shelf page and the wall shelf page each show a configuration for it.

Steam, grease, heat: what the material does

Wood takes moisture from the air until it is in balance with it. At 20 degrees and 50 percent humidity, oak sits at 9 percent wood moisture, at 65 percent at just under 12, at 80 percent at 16. The German Environment Agency recommends 40 to 60 percent for living rooms, and for kitchen and bathroom, opening the windows wide for five to ten minutes during and after cooking. A kitchen aired like that is a normal room for wood. One where the steam hangs is not.

A KUUDU board is oak veneer on a core of powder-coated aluminium. The core takes on no moisture and does not warp; the veneer breathes with the room, but it is thin and firmly bonded. A humid summer or a pot of pasta bends nothing. The surface is sensitive in one place only: where water stands. That is exactly what happens directly above a hob without an extractor, when steam condenses on the cooler underside of the board and forms drops there. So the shelf hangs next to the stove and above the worktop, not above the pots.

Grease is the second question. In kitchen air it floats finely dispersed and settles over time as a film on everything that stands open, on glasses just as on wood. On oiled oak the film comes off with a cloth, warm water and a drop of pH-neutral soap, along the grain, wiped dry straight away. Vinegar, citrus and spray cleaners take the oil with them. If you clean like this, you re-oil more often than in the living room; the instructions are in the care article, and in the kitchen the shorter of the intervals given there tends to apply.

What goes where

On the wall shelf, at eye level: what is used daily and does not get wet. Spices, cups, the olive oil, the two cookbooks that really lie open. On the 35-centimetre board below: plates, bowls, supplies in jars, and the heavy things low, because a board carries 20 kilos and a stack of plates gets heavy faster than you think. And above the hob: nothing made of wood. How deep the boards should be for the other rooms is in the article on shelf depths.

Sources

• AMK Arbeitsgemeinschaft Die Moderne Küche e. V., "Küchenstandards" (PDF): working height 10 to 15 cm below elbow height, tolerance 5 cm down and 10 cm up; at least 120 cm between kitchen runs. amk.de, retrieved 14 September 2026.
• nullbarriere.de, "Planungshilfe barrierefreie Küche": clear distance to the worktop 40 to 50 cm, from a body height of 165 cm 50 cm; working surface 10 to 15 cm below the bent elbow (after the ergonomics study of the Institute of Ergonomics, TH Darmstadt, 1991). nullbarriere.de, retrieved 14 September 2026.
• Umweltbundesamt (German Environment Agency), "Wie lüfte ich richtig?": relative humidity in living rooms 40 to 60 percent; in kitchen and bathroom open the windows wide for 5 to 10 minutes during and immediately after cooking or showering. umweltbundesamt.de, retrieved 14 September 2026.
• Equilibrium moisture content of wood at 20 °C: 50 % relative humidity 9.0 %, 65 % 11.8 %, 80 % 16.0 % wood moisture (table after R. Keylwerth and the U.S. Forest Products Laboratory, 1951). holzfragen.de, retrieved 14 September 2026.
• Plate sizes: Villeroy & Boch dinner plate Manufacture Rock 27 cm, soup plate Royal 25 cm, side plate NewMoon 22 cm, listed at tischwelt.de, retrieved 14 September 2026. Book formats: epubli, "Buchausstattung", epubli.com, retrieved 11 September 2026.
• KUUDU dimensions: wall shelves hang with half boards 15 cm deep, standing shelves with full boards 35 cm deep; gaps 25 and 35 cm, board 1.6 cm; 20 kg per board according to the product information. Board construction (oak veneer on powder-coated aluminium) according to the product information and the materials article.