How is tadelakt plaster applied?

The first time I ran my hand over a tadelakt wall in a Marrakech riad, I genuinely thought it was polished stone — it was cool, seamless, faintly glossy, with a depth to the colour like still water. It is in fact lime plaster, a Marrakech speciality born in the hammams and now prized for bathrooms and walls precisely because it is waterproof and has no joints or tiles for water to get behind. But the surface only becomes that beautiful through hours of hard, skilled hand-labour.

The plaster itself is slaked lime from the Marrakech region, mixed to a smooth paste and often tinted with natural pigment — ochre, rose, deep grey-blue. The maâllem trowels it onto the wall in coats and lets it firm up to just the right tackiness. Timing is everything: too wet and it smears, too dry and it cannot be worked. This is why tadelakt is a craft and not a product you simply paint on.

Now the magic, and the sweat. While the plaster is still damp, the craftsman compresses and polishes the whole surface with a smooth, hard river stone (a galet), pressing and rubbing in tight circles, again and again, for hours. This burnishing crushes the lime tight and brings up a sheen. Then he works black soap — the soft, olive-oil savon noir from the hammam — into the surface with the stone; the soap reacts chemically with the lime to seal the pores and make it genuinely water-repellent. The result is that one-piece, stone-like, slightly undulating finish that catches the light so beautifully.

You sleep surrounded by tadelakt in almost any good riad, and the hammams of Marrakech are its true home. Some workshops and design studios in Marrakech offer demonstrations or short hands-on courses if you want to try the burnishing yourself — it is far harder than it looks. Ask our guides; they can point you to artisans who still mix the lime and wield the stone the old way, and you will appreciate every glowing wall in your riad all the more.