NATURAL STONES
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   PROTECTION

Protection of walls, doors and next rooms, as well as moving of furnitures have to be done before any works. NET AZUR TRAITEMENT can charge for these works.

		SCOURING

For brand new terra cotta, a buffered acid solution is used to get rid of rests of plaster, cement and soft roe.
A neutralisation followed by several rinsings complete this stage!

Solvented scouring is necessary for terra cotta which have already had one or several treatments: it will get rid of old waxes and “bouche-pores”. The type of scouring will depend on layers of waxes to remove: “soaking scouring” can be necessary. It consists in “drowning” tiles in order to soften, as deeper as possible, the layers of old waxes. Drying time will obviously be longer!

		DRYING
Drying period depends on hygrometry, and the season when scouing takes place. In summer, drying time is shorter than in winter. The region is also a crucial role :  Northern France is wetter than Southern France. That's why a period from 2 to 10 days is advocated!
Make sure that no one walks on recently scoured terra cotta : they are very weak, without any protections. The smallest mark of oil or solvent would be unavoidable!
   THE DIFFERENT TREATMENTS

		Hydrophobic treatment MAT FOR INSIDE AND OUTSIDE

Solvented product, protects terra cotta from water, but also oil marks. It is a non-filming product, with a
mat and colourless finish.

		Hydrophobic/Oleophobic treatment bright finish

 With a catalyst, it protects from water and  house marks. It is also a non-filming product and a colour
brightener!
Laying a hydrophobic product against the penetration and rising of water is strongly recommended! It prevents the absorption of humidity but also the appearence of white efflorescences (saltpetre) and avoids capillarity phenomenon. This product is colourless, non-filming and allows the internal humidity to carry on draining off!

There is also an efficient aqueous treatment, but it needs to be regularly renewed. It is not UV-resistant.

   OUTSIDE TREATMENTS

Before starting an outside treatment, terra cotta has to be cleaned, that is to say without any moulds, bacteria or mushrooms!
First, a powerful anti-mould is spread out, which will kill all of the bacteria and mushrooms, and left for 10 days. Then, scouring is carried out. 
A new preventive spraying of anti-mould is laid on. After this stage, an outside treatment is conceivable.

Several types of outside treatments can be carried out, as herebelow:

		ANTI-SALTPETRE TREATMENT

Salpetre is the scourge of numerous properties which have been victims of infiltration water, flooding or constant humidity, indeed underground humidity.
First, a measure of hygrometry has to be performed before any works! A first dry-souring is done. Then, a specific scouring perfected by our professionals is carried out to limit and reduce the formation of saltpetre (cf TECHNICAL). Getting rid of saltpetre is very difficult : several meticulous rinsings with purified water ( nitrates free) is necessary.
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