References

Physical chemical barrier against capillary rising humidity





Out of ground realization, from both external and internal sides and for all the zone of interest, of a chemical barrier against rising humidity by the use of a combined barrier system U-stop + antisalt rendering Spritz RS + dehumidifying plaster Into-Base.

The ground level where to execute the holes will be determined depending on the thickness of the wall and on the inclination of the holes (30°).

Execution of the holes (to simplify the execution one may use an appropriate support).
- Hole inclination: 30°;
- Hole diameter: 22 mm;
- Hole depth: thickness of the walls –5 cm;
- Centre-to-centre of aligned holes: max. 11 cm;
- Hydration and washing of the holes (all the holes must be hydrated)
- Injection of the mixture U-stop until saturation.






Phases of the intervention

Complete removal of the old plaster to 1 m beyond the maximum level of the rising and for at least 2 cm of depth into the bed mortar.

Mechanical dry cleaning of the bared surfaces, and subsequent removal of the rubble with their transportation to the public disposal facilities. Pressure washing of all the surface under treatment.

Application of an anti-nitrate treatment (if necessary), execute after 8-10 days a mechanical cleaning of the salts which have eventually appeared on the surface and accurately remove them from the base of the wall. Apply a 5 mm layer of the rendering Spritz RS for a regularization resistant to sulphates.

Application of two layers, 2 cm thick each, of the dehumidifying plaster Into-Base.

Once the dehumidifying plaster is cured (1 day for each mm. of thickness), application of the dehumidifying slurry RD Lime.

In order to obtain a white or coloured finishing, one may apply the highly transpiring lime coating Granada or the lime based painting Cadix.



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