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Innovation in cotto cladding.
Supply and installation of a “curtain wall” cladding, composed of a mechanical steel / extruded raw aluminum fixing system and Sannini Impruneta terracotta elements, acid-washed and treated:
Primary structure constituted of vertical sections of stainless steel / extruded raw aluminum placed at 50 cm distance approximately. Sections are bound to the support slabs and fixed to the wall by means of special straps and expansion bolts equipped with adjustable spacers and anchors for the fastening of the Cotto elements.
The cladding is realized with Cotto element “Piastra 25 mm with reveal”, manufactured out of a special clay extracted from the Impruneta area. The elements are supplied in sizes of (l x h x t): 500 x 300 x 25 mm. They have normal kerfs on their upper and lower side and a surface finish “Arrotato”, installed with vertical and horizontal joints of about 6 mm. The Cotto elements are to be installed carefully in order to avoid possible out of square placement and to provide compensation for any tolerance from the existing backup wall or reinforced concrete structure, leaving a space of about 8/10 cm between the back face of the cladding elements and the support wall.
Treatment: the external face of the Sannini Cotto element requires acid-washing by using a decalcifying acid solution for the removal of possible efflorescence and surface protection through the application of an impregnation on a siloxane micro-emulsion basis.
Extruded terracotta with rustic surface, obtained through working the element’s surface with steel brushes prior to firing. The intense colour of this tile is due to the removal of surface salts during the brushing process.
Extruded terracotta with rustic surface “arrotato” and fullbody tobacco colouration.
The coloration is being obtained by mixing a composition of oxides into the clay, allowing a uniform colour penetration
Extruded terracotta with rustic surface “arrotato” and fullbody champagne colouration.
The coloration is being obtained by mixing a composition of oxides into the clay, allowing a uniform colour penetration and distribution. All physical and mechanical characteristics remain unaltered.