Maintenance of older buildings and conservative restoration of ancient works, also of monumental interest, made with facing brick material or, however, exposed to the exterior environment, are scenarios in which could be necessary to adopt protective interventions from the environmental pollution and particular atmospheric variations, thermal and hydrometric.
Conservative treatment to be applied can be cleaning, consolidation, protection, grouting and bonding, and must be defined at the end of a series of careful analysis carried out by experts in qualified laboratories.
The cleaning is to remove from the work facing dust, soil, weeds, manure, concretions and encrustations, patinas and stains, efflorescence, smog, microorganisms, etc..
Depending on requirements, the cleaning can be made with water (spray, sprinkler, or nebulized)or with steam jets. Eventually it can be integrated with appropriate solvents. After cleaning may be necessary to consolidate the altered layer surface and make it adhere better to sound substrate. For this are used products that, without deleting it, reduce the porosity of the material (which always must “breathe”) such as ethyl silicate, alkyl-alkoxy-silanes and mixtures of these, which were particularly effective on materials tuffaceous.
The protection of the clean and optionally consolidated manufacture can be done by acting on the environment with the elimination of deteriorating agents or substances with the adoption of shield substances, which reduce the penetration of water, and of the materials conveyed by it, within the material. The best results were obtained with the protective use of silicone resins, or, when possible, with a thin layer of hydraulic lime mortar, the contact of which Fiorditufo develops all its pozzolanic high quality.
The fillings are designed to fill the cracks and discontinuities of the materials to be restored.
They, to completely prevent the water penetration, must also be performed on smaller lesions. For what already said, also for the fillings best results are obtained with the use of hydraulic lime mortar. To make editing less visible, but distinguishable from the original work, it is a good and well-established rule to make the fillings in a few millimeters sublayer.
Even gluing or replacement of elements or parts of them to the preexisting structure tufaceous are optimally realized with hydraulic lime mortar.
The “Carta Italiana del Restauro” [Italian Restoration Charter] (Rome 1972) recommended for the restoration of curtains in opus incertum, opus reticulatum and vittatum, to use the same tuff quality and the same types of “tufa” in ancient measures maintaining the restored part on a plane slightly more backward, and using mortar mixed on the surface with powder of the same material to achieve the proper intonation chromatic.
Cave Riunite can provide, for the restoration, parts created ad hoc, based on design and dimensions provided by the customer. In addition, Cave Riunite produces Opera, a wide range of products, designed specifically for the finish, the integration of buildings and settings.