Sauna and Hammam at Home

Behind a door of smoked glass the air smells of warm spruce, and a wooden ladle rests in its bucket beside a heap of dark stones. Down the corridor, a second door opens onto marble softened by steam. Sauna and hammam are two of the oldest bathing traditions, and both can find a place in a private house. Here is how they differ, and what it takes to build each one well.

At a glance

• A Finnish sauna offers dry heat of around 70 to 100 °C with brief bursts of steam.
• A hammam is a very humid steam room of around 40 to 50 °C, lined with stone.
• Ventilation, waterproofing, drainage and the electrical and steam installation are planned early by specialists.
• A place to rest and cool down afterwards is as important as the hot room itself.

Two ways with heat

Both rooms are about warmth, yet they could hardly feel more different. The Finnish sauna is a dry heat, strong enough that the scent of the wood becomes the room’s main voice, broken by brief bursts of steam whenever water meets the stones. The hammam, often called the Turkish bath, is the reverse: a moderate warmth in air so humid that steam hangs in the room like a soft veil.

Each grew out of its own landscape and way of life, and each has its own rhythm of heat, rest and cooling. A house with enough space may hold both side by side, sharing a shower and a resting room; a smaller one chooses the tradition that suits its owners and builds it with care.

The Finnish sauna

A sauna is typically heated to around 70 to 100 °C, with low humidity. The heat comes from a stove, fired by wood or electricity and topped with a basket of stones. When water is ladled over the hot stones it rises as a burst of steam, called löyly in Finnish, and the room feels warmer for a moment before the air dries again.

The interior is lined with untreated wood of low density, such as spruce, aspen or alder, which stays pleasant to touch in the heat and smells clean and resinous. Thermally modified wood, darkened and stabilised by heat alone, is another choice, deeper in colour and calm in grain. The benches are left untreated, so the wood stays matt and comfortable against the skin.

Benches are set at different heights, usually in two or three tiers, because heat rises: the upper bench is the hottest, the lower one gentler. A backrest, a step that doubles as a footrest, a small window and soft light set low behind a slatted wooden screen complete the room.

The hammam

The hammam continues the bathing culture of the Roman and Byzantine baths, with their sequence of rooms of rising warmth, which lived on in the bathhouses of the Ottoman world and far beyond. A private steam room distils that tradition into a single warm and very humid space, usually around 40 to 50 °C, with the steam made by a generator outside the room and released through a discreet outlet.

Its surfaces are marble or tiles on the walls, the floor and the benches, which can be gently warmed from within. The ceiling is often domed or sloped, so condensation runs down the walls rather than dripping from above. Old hammams pierce their domes with small glass openings that let in points of daylight; at home, a few concealed lights do the same, scattered like stars through the steam.

Water is part of the ritual, poured over the shoulders from a small bowl, so a stone basin with its own tap is both lovely and practical. Tadelakt, the polished lime plaster of Morocco, is a traditional alternative to marble on the walls, seamless and softly lustrous.

What the house must provide

Both rooms ask more of a house than their size suggests, and the work belongs to specialists. A sauna needs a supply of fresh air and an extract, placed so the air circulates around the stove and the benches, and a stove matched to the volume of the room. A steam room needs complete waterproofing: a sealed membrane behind the stone or tiles on every wall, floor and ceiling, and a floor that falls gently towards a drain.

Power and steam are planned with the room from the start. The electrical installation of a sauna stove or a steam generator is the work of a qualified electrician, and the generator needs a water supply, a drain and a place where it can be reached for servicing. Before the walls go up, agree on these points:

• Ventilation: fresh air in, used air out
• Waterproofing: a sealed membrane behind every steam room surface
• Drainage: a gentle fall towards the drain
• Power: circuits planned by a qualified electrician
• Steam: a generator with access for servicing
• Doors: closing softly and opening outwards

Every hot room deserves a quiet one beside it, where the warmth can settle.

Rest and cooling

Heat is only half of the ritual. After the sauna comes cooling, under a cold shower, in a plunge pool or simply in fresh air on a terrace, and then rest. A place to lie down matters as much as the hot room itself, so plan a resting room or a quiet corner with a daybed, wool blankets, linen towels and a jug of water, ideally with a view of the garden or the sky.

The hammam brings its own gestures: a pause on warm marble, a wash with soft soap and a textured mitt, a rest wrapped in light cotton. The peshtemal, the flat-woven cotton towel of the Turkish bath, dries quickly and folds into almost nothing, and a stack of them by the door looks as good as it works.

Outside the hot rooms, keep the light low and warm, ideally from a single lamp at the height of a reclining head, so the rest feels unhurried and the eyes adjust gently after the steam.

Late in the evening the stones tick softly as they cool, the last steam drifts off the marble and the house falls quiet. A sauna or hammam at home is less a piece of equipment than a habit given a room of its own, and like every good habit, it grows richer with each return.

Questions and answers

What is the difference between a sauna and a hammam?

A Finnish sauna offers dry heat, typically around 70 to 100 °C with low humidity, and short bursts of steam when water is poured over hot stones. A hammam is a warm, very humid steam room, usually around 40 to 50 °C, lined with marble, tiles or polished plaster.

Which wood is used to line a sauna?

Saunas are traditionally lined with untreated woods of low density, such as spruce, aspen or alder, which stay comfortable to touch in the heat. Thermally modified wood, stabilised by heat alone, is another choice. The benches are left untreated, so the wood stays matt and pleasant against the skin.

Who installs a sauna or steam room at home?

Several specialists work together: an architect or planner for the room, a qualified electrician for power and lighting, and installers for ventilation, waterproofing and the steam generator. Involve them early, since ventilation, drainage and electrics shape the room before the first board or tile is laid.

Terms in this article

Löyly

The Finnish word for the burst of steam that rises when water is poured over the hot stones of a sauna stove.

Hammam

A warm, very humid steam bath with marble or tiled surfaces, continuing the bathing culture of the Roman and Byzantine baths.

Thermally modified wood

Wood treated with heat alone, without chemicals, which deepens its colour and makes it more stable.

All terms in the glossary

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