Hassan Fathy, and the breath of the house

Hassan Fathy built in one of the hottest countries he could have chosen, and almost never reached for a machine to cool a room. The Egyptian architect — the one the world came to call the architect of the poor — spent a long life proving something we have nearly forgotten: that a house, rightly shaped, can be its own climate. Earth for its walls, the night sky for a ceiling, the wind for an engine.

He is one of our references, and not for nostalgia. Fathy is a reminder that the intelligence we now spend electricity to buy was once drawn, instead, in the plan: in which way a wall faced, how thick it stood, where the air was let in and let go. We came to this through our own work in the heat of the Mediterranean; he had reasoned it out, beautifully, half a century before.

Working with the sun, not against it

By the time Fathy began, the modern movement had a single answer to heat anywhere on earth: a thin glass wall, and enough power to pump the warmth back out. He turned the other way — toward the villages of Upper Egypt and Nubia, where builders who had never heard the word sustainable had answered the desert for a thousand years with nothing but earth, geometry and the path of the air. Fathy studied their houses the way a composer studies folk song, and built a life’s work — and two books, Architecture for the Poor and Natural Energy and Vernacular Architecture — arguing that the old answers were not quaint but exact.1,2

His houses cool themselves with three moves, each of them pure geometry: a tower that catches the wind, a court that holds the cool, and a dome that lets the heat climb away. Watch them work together and a Fathy house stops being a picture and becomes a quiet engine — one with no moving parts but the air.

The wind catcher

The first move is the malqaf, the wind catcher: a shaft carried up above the roof, its mouth turned to face the prevailing wind — in Egypt, the cool, dust-free air that moves steadily from the north. Up there the air is faster and cleaner than at street level; the malqaf scoops it and pours it down into the house. Fathy refined the old device with care — passing the incoming stream over a wetted surface, a fountain or porous jars, so that a little water evaporating into it drops its temperature before it ever reaches the room. Wind in, cooled on the way down, with nothing spent but a few drops of water.

The courtyard, the dome and the lantern

The second move is the courtyard — the sahn — an outdoor room with the sky for a roof. Shaded for most of the day, it gathers a pool of cool, dense air through the night and holds it like a well; the rooms around it drink from that reserve, and the cool air drawn down the malqaf crosses the court before it enters the house. The third move is the dome. A dome is more surface than a flat roof of the same span, so it sheds the night’s heat faster to the sky; one flank of its curve is always in shadow; and under its vault the hot air of the day rises and collects, to slip out through small openings at the crown — a lantern that breathes. As the warm air leaves the top, it pulls fresh air in below: the whole house is set quietly circulating by heat alone.

And all of it is built of earth. Fathy revived the Nubian vault and the mud-brick dome — raised in leaning courses, without a stick of timber centering beneath them, a technique he found among the masons of Aswan — so that the poorest village could roof itself in the very ground it stood on. The thick mud walls do their own slow work: they soak up the day’s heat and give it back, harmlessly, hours later in the night, holding the rooms near the gentle average rather than the burning peak.3 Fathy proved it with two test rooms of identical plan — a sun-dried mud-brick vault and dome against one of prefabricated concrete: the earthen room swung far less between noon and night and lagged the peak by hours, while the thin concrete shell tracked the heat outside almost at once.

A house, rightly shaped, is its own climate.

New Gourna — building with the people

The clearest statement of all this was a village. In the nineteen-forties Fathy was asked to move the community of Gourna, whose houses sat over the tombs of the Theban necropolis at Luxor, to new ground nearby. He built New Gourna in mud brick, with vaults and domes and shaded courts, and — most radically — he tried to build it with the villagers rather than merely for them, training them to lay their own walls so the knowledge would stay in their hands. Each house was to be adapted to its family.4

It was not a simple triumph; honesty asks that we say so. The villagers resisted the move, funding faltered, and much of New Gourna was never finished or was later altered. But the idea outlived its difficulties: an architecture made of local earth, local hands and local climate, owing as little as it can to the outside, and giving dignity its proper place in the plan. That is why the world remembers him as the architect of the poor — though the lesson belongs to everyone who builds in the sun.

Why he is one of our references

We work between Ibiza and Cyprus, on islands where — as on Fathy’s Nile — the adversary is rarely the cold, but the sun and the long warm evening. The old houses there reach the same conclusions he did: mass to keep the cool, small shaded openings, white skins that throw the light back, the air let through where it does the body good. When we imagined the Cubo in-finito — a rammed-earth figure for the Ibiza coast, graded from solid to porous as it turns from the sun — we were, knowingly, working in his line. The materials are of the place; the cooling is done by geometry; the machine is, as far as possible, left switched off.

That is the whole of his gift to us. For most of history a building had to be its own climate, made of earth and shade and the path of the air, drawing on nothing but the night sky and the coolness of the ground. We spent a century forgetting it, sealing the rooms and pumping the heat away with power we can no longer spare. Fathy never forgot — and a warming Mediterranean is being made, slowly, to remember. Before we reach for the machine, his houses ask the older question first: what can form alone do? Answered well, the reply is a house that keeps you, and asks almost nothing in return.