From Wikipedia

Tadelakt is a bright, waterproof lime plaster which can be used on the inside of buildings and on the outside. It is the traditional coating of the palaces, hammams and bathrooms of the riads in Morocco. It is characteristically polished with a river stone and treated with a soft soap to acquire its final appearance. Tadelakt has a soft aspect with undulations due to the work of the stone; it is water-tight, which also makes it suitable for making bathtubs and washbasins and confers great decorative capacities. Tadelakt is generally produced out with lime of the area of Marrakesh, but other types of lime can also be appropriate.

Tadelakt has gained new glory thanks to the new vogue of restoring riads in Morocco.

Walls

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Very informative

http://www.naturalpaint.com.au/DataSheets/tadelakt_info.htm

Tadelakt is a Moroccan render technique. A special lime render is applied and compressed with stones which results in a compact shiny surface. This lime material is not only used for exterior and interior walls but also for floors, bath tubs, showers, table surfaces and especially in Hammams.

Tadelakt is addictive
The shiny surface of Tadelakt exudes a hard to describe fascination which almost nobody can escape. One is almost compelled to touch the surface. Tadelakt produces an earthly, homely ambiance. The way the material is applied produces a fascinating slightly wavy, living, naturally shiny surface. The colour tone of the Tadelakt is not regular like in normal pigmented render, but depends on the application. Where the material is a bit more compressed, a darker colour tone will result. The surface of the Tadelakt seems to change in colour tones depending on the lighting conditions.

History
There are no detailed documents about Tadelakt available, but oral information in Marrakech gives us the following details:

Tadelakt has been around since the middle ages. In the beginning the technique was used to waterproof cisterns which where used to collect drinking water. Later on it was used in Hammams, the oriental baths and in palaces. Traditionally the Tadelakt technique was applied by the Berbers who passed on their knowledge from generation to generation.
Tadelakt comes from the Moroccan verb "dellek" which means to kneed or squash.

The Material
There is a natural deposit of lime stone in the area of Marrakech. Because of the geological uniqueness of that area the lime produced there, has a special composition of minerals. With that, nature has given the Moroccan people a material that, when burnt and subsequently "extinguished" with water, results in a high density lime render.
When the lime render is coloured with lime compatible pigments and treated with black soap, these fascinating surfaces are the result.

Research has found that this Moroccan lime is highly hydrophobic. With this and the compression technique the end result is a strong and water proof surface.

The Moroccan material has naturally occurring variations of quality and has not necessarily an ideal sieve line. It has to be sieved at the building site and has to be tried on a test area before every application. In most of the Moroccan Tadelakt surfaces we visited, we discovered fine cracks.

Because burnt hydrophobic lime can only be stored for a limited time and transporting lime over great distances is not economical we decided to develop a Tadelakt product with the raw materials we have available locally.

With NATURAL PAINT Tadelakt, we succeeded in developing a material which has most of the Moroccan properties, but through optimising the sieve line we achieved that the material is easier to smooth out and will not develop cracks.

How to apply tadelakt

http://www.tierrafino.com/en/tadelakt_application.html

Websites in in German

http://www.tierrfino.de/

http://www.tadelakt.de/index.2.php

http://www.ochspainting.de/

http://ag-tadelakt.de/

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Dar Zenbouaa

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Comment fabrique t-on le tadelakt ?

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