Tadelakt technique follows several steps in terms of material and wall preparation. A correctly prepared undercoat is essential for achieving a high-quality tadelakt surface. The substrate for plaster Tadelakt should be solid, firm and able to carry weight. Not all construction materials are suitable to be used as a direct undercoat for Tadelakt, because it is a hydraulic and carbonating lime mixture. But most substrates can be pre- treated by applying a suitable undercoat (for example, cement). The undercoat should be firm, clean, straight, homogenous, evenly absorbent, rough (with particles striking out and with small cavities), and free of cracks. The number of coats in the plastering varies while normal is three and following polishing and sealing and/or waxing
