The company Alfredo Polti SA, a typical family business, is active in the industrial sector of natural stone. It was founded by Alfredo Polti in 1950, with the launch, in Grono, of a workshop for the processing of the Gneiss Calanca. The pioneer was however Alfredo’s father, Giovanni Polti, who in 1920 was involved in the extraction and processing of the Gneiss Calanca in the quarries of Arvigo, where in 1960 Alfredo Polti transferred the entire production. The extraction of the stone from its own quarries and its elaboration in new and modern laboratories thus became two integrated phases of a single production process. The Gneiss Calanca extracted from the quarries Alfredo Polti SA is treated in modern laboratories, where expert stonemasons transform it manually or mechanically, thanks to the help of the most modern machines for working with stone. Moreover, part of the material is put on the market in the raw state, in the form of blocks, irregular or quadrangular slabs, or masonry stones. The available offer is vast and includes products for: • the substructure • the superstructure • the construction and furnishing of parks, gardens, squares and cemeteries • the creation of artifacts able to satisfy the most demanding dictates of modern architecture of exteriors and interiors. About 90% of production is destined for the Swiss domestic market. The remainder is exported, in particular to Germany, Italy, Austria and France. In many cities of these countries you can admire important works realized with the Gneiss Calanca by Alfredo Polti SA produced in Arvigo. After the death of the founder Alfredo Polti, the company was taken over by: Giovanni Polti, who takes care of the extraction and production processes and Vania Polti Ambrosini, who guarantees administrative management. Since 2013, Alfredo Polti SA remains the only active quarry in the Calanca valley. Most of Alfredo Polti SA's collaborators have many years of service in the company, synonymous with experience and professionalism at the service of customers. Since May 2007 the company is ISO 9001 certified.

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SwissDomestic Romano Dorsa Installer electrician AFC Light planner SLG1 Specialist home appliances I deal with the repair, consulting and sale of home appliances, as well as general electrical work(limited concession art. 15) The strong point is the after-sales service, which thanks to the proximity with the customers I have the ability to provide assistance and perform repairs even after the purchase, so that the customer will never be alone. The narrow area of action gives me the opportunity to be faster and more flexible. Inside the company there is a separate section, the "Studio Dorsa: Light Planning/Lichtplanung/ Light Design" , where I deal with everything that revolves around the magical world of light, from consulting to lighting design, from the sale of lighting fixtures to the creation of customized lighting systems . This is a project that is slowly emerging with attending schools and practical tests, I take my time to improve it and make it grow because light is a material that has to be loved and felt and then made. Member EIT.swiss Member Swiss Society for Light Romano Dorsa Installer electrician AFC Light planner SLG1 Specialist home appliances

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