Where to hang a painting: light, humidity, surroundings
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The question of where to hang is usually decided by aesthetics: wherever it looks good is where it goes. But a painting has requirements that have nothing to do with looks, and if they are broken, the work deteriorates — slowly, imperceptibly, over years.
Here is which places do harm, and why.
The main enemy: direct sun
Ultraviolet destroys paintings. It breaks down the binder film and bleaches pigments, and does so unevenly: some colours hold for decades, others fade in a few years.
That is why the worst place in a home for a painting is the wall facing a window, especially a south- or west-facing one. However much light there is for viewing, direct sun will gradually destroy the work.
The rule is simple: no direct sunbeam should fall on the painting at any time of day. Diffuse daylight does no harm. If the only convenient wall catches the sun, hang something diffusing at the window — a net curtain, a blind — or move the work.
Heat: radiators, fireplaces, kitchen
Painting dislikes sharp temperature changes and constant streams of heat.
Above a radiator. Rising warm air creates a constant dry current straight along the canvas. The fabric and the stretcher wood dry out, and the paint layer cannot keep pace.
Above a fireplace. A classic place for a painting and one of the worst. Heat, soot, fluctuations — all at once. If the fireplace is electric and gives off no heat the risk is lower, but soot from candles and smoke remains.
In the kitchen. Steam, grease, sharp swings in temperature and humidity while cooking. Grease settles on the surface and darkens over time. A painting in the kitchen is a poor idea, even in a kitchen-diner.
Humidity
A canvas is fabric on a wooden stretcher. Both fabric and wood respond to moisture: they swell and contract. The paint layer cannot keep pace, and sharp swings produce cracks.
The external wall of an unheated space. In winter such a wall is colder than the room air, and moisture condenses on it. A painting there sits in a zone of constant damp.
Bathroom, pool, porch. High humidity or sharp fluctuations. No place for oil.
A newly built or newly renovated home. Fresh concrete and plaster give off moisture for months. Before hanging a painting on a fresh wall, let the room dry out.
The comfortable range is 40–60% humidity. The exact figures matter less than stability: a work will take slow seasonal drift, but sharp swings are harder on it.
Good places
Now to where you can and should hang.
A wall to the side of a window, receiving diffuse side light but no direct beam. The ideal: enough light to view, no UV striking it.
An internal wall of a room — one behind which lies another heated space rather than the street. Stable temperature, no condensation.
Hallway, entrance hall — often the best places: no windows with direct sun, a stable climate, and the work becomes an event in a transitional space.
Bedroom, study — quiet rooms with an even climate. Painting is at home there and lasts a long time.
Surroundings
Beyond climate, there is the question of what is nearby.
Do not press it flush to the wall. There should be a gap between canvas and wall for air circulation — cork pads on the lower stretcher corners solve this. Without a gap the reverse is not ventilated, and in humidity mould can appear.
Do not run cables behind the painting. They impede circulation and can scratch the canvas from behind.
Care with other paintings alongside. If hanging a group, leave 5–10 cm between works. Flush together they interfere with each other both visually and for ventilation.
Light fittings. If you mount a lamp above the painting, check that it does not heat. Halogen lamps close to the canvas are a source of local warming.
What to do when moving
The painting comes off the wall last and goes up first — after the room has warmed and dried.
Do not leave the work in an unheated garage or store for long: temperature and humidity swings are greatest there. If temporary storage is needed, keep it upright, face to the wall, in a dry heated place.
Frequently asked questions
Can a painting hang in an air-conditioned room?
Yes, air conditioning is actually helpful — it stabilises temperature and humidity. Just keep the airflow from being directed straight at the canvas: a constant cool stream dries the surface out.
What if the only wall faces a window?
Diffuse the light at the window: net curtain, blind, matte film. No direct sun should fall on the work. If that is impossible, better to put a print or reproduction on that wall and hang the original elsewhere.
Is artificial light harmful to a painting?
LED is not — it neither heats nor emits UV. Halogen heats and harms at close range. Fluorescent tubes give off weak UV but are safe from a distance.
Can a painting hang in a bathroom?
Not an oil. High humidity and its sharp swings destroy both canvas and paint layer. For damp rooms only prints under glass will do, and even then with caution.
If you are unsure about a particular wall, describe its position and lighting and I will tell you whether it suits a work.
