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Tadelakt
A Moroccan lime plaster. Compressed, then treated with black olive soap. The soap and the lime make a different surface than Venetian work. This school teaches both — and keeps the names straight.
Tadelakt plaster is not a brand, a sealer, or a shiny Italian wall. It is a lime plaster from the Marrakesh region, worked dense, then soaped so the surface becomes water-resistant.
The binder is lime — the same family as Italian finishing lime, not latex. The traditional work is for hammams, basins, and wet rooms. You apply it, compress it (historically with a river stone; in class with stone and steel), then work in olive soap (savon noir). The fatty acids in the soap react with calcium hydroxide and form calcium stearate. That soap-lime skin is why tadelakt plaster sheds water. Wax on Venetian plaster does not do this. A bottle of sealer does not do this.
If a bucket says “tadelakt” and the instructions are roll, dry, and topcoat with acrylic, it is not tadelakt plaster. It is a look.
Venetian plaster (grasello / stucco veneziano, marmorino) is an Italian lime-and-marble finish, burnished for stone and polish. Tadelakt plaster is Moroccan lime, compacted and soaped. Same mineral family, different country, different trowel, different chemistry on the face.
Do not spec grasello in a shower and call it tadelakt. Do not spec tadelakt on a dry dining-room wall because the word sounds expensive. Write the right name. See the glossary and how lime is made.
Build a sound lime or compatible base. Apply the tadelakt plaster in coats while the wall can still take it. Compress. Time the soap — too soon and you smear; too late and it will not take. The class is mostly that timing. You cannot learn it from a caption.
Maintenance is soap and a soft hand, not latex paint. If you paint tadelakt plaster you have ended it.
Wet rooms, baths, feature walls that should feel like stone and take a wipe. Not a shower pan. Not a floor with standing water unless the build-up was designed for that. Not a substitute for tile where the specification requires tile.
Tadelakt 101 is two days with Ronald Layman: material handling, application, compression, burnishing, and sealing. Live demonstration, then boards. $500. Materials included. Frederick, Hollywood, Dallas, and Orlando.