1. The surfaces on which the stone is placed must be well fixed. In the event that the substrate is painted or greasy, preliminary work is required to remove it and impregnate it with quality deep-penetrating impregnation. With a laser or a level, they are measured and the horizontal lines on the wall are marked in order to hold the stone plane as accurately as possible.

2. Mix the quality flexible glue well and let it rest for a few minutes and stir again so that all the material is homogeneous.

3. If it is necessary to adjust the irregular stone, use a stonemason’s hammer, and in the case of a stone of regular shape it is possible to use a flexer for cutting.

4. Apply glue to the stone.

5. Apply glue to the base and pull with a trowel. Be sure to glue the stone with double gluing, that is, applying glue to the stone and to the base.

6. Glue the stone with light horizontal or vertical movements parallel to the surface to displace the air between the stone and the substrate.

7. Leave a gap between the stones 1-2 cm depending on the desired effect and break the horizontal and vertical joints to create a more natural way of stacking the joints.

8. Grouting with a cloth or nylon bag so that you fill the joints to the end.

9. Depending on the temperature and absorbency of the base and stone, try a stone with your finger.

10. In the event that a wet trace of the joint remains on the finger is still damp and should not be grouted.

11. When the fugue achieves the consistency of wet sand, you can process it with a suitable stick. In this case, the fugue runs and cannot stain the stone, while this can very easily happen if the fugue is wet.

In the event that the stone gets dirty with mortar, it is necessary to clean the joint from the stone with a damp sponge within an hour. Helps vinegar diluted 1:8 with water.

12. After processing the joints with a stick sweep and smooth the excess joint with a panicle of medium hardness.

13. It is possible to additionally impregnate the wall with a quality impregnation that repels water or oil, and there are special types of impregnations that serve to facilitate the removal of graphite.