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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We offer customised waterproofing and resin coating solutions for customers in the Ticino region and Italian-speaking Switzerland. We innovate with sustainable solutions to ensure durability and safety Resin Coatings We perform resin coatings in outdoor and indoor areas; balconies, terraces, swimming pools, stairs, public areas, seamless living floors, etc. Beton Renovation Work on concrete walls and walls with resin injection system, static reinforcement of the load-bearing structure with resins and application of carbon fibre strips Fire Protection Insulation and Fire Protection Laying System Sealing of plant penetrations and structural joints, treatment with suitable intumescent and thermo-expanding fireproofing material in accordance with VKF standards Siliconing Sealing of all types of joints and gaps in new and existing constructions with suitable materials. We use high-quality products complete with warranty Waterproofing With proper waterproofing you can prevent damage caused by water seepage or condensation are the main causes of serious damage to the structure of buildings Choosing Isoline means relying on proven experience and innovative solutions in waterproofing and renovation, guaranteeing high quality and long-lasting results with a strong commitment to sustainability and safety. The benefits of resins are floor and wall coverings: ‍ ‍Repellent: Resin repels water, preventing damage from moisture and mould. This makes it ideal for damp environments such as bathrooms and kitchens. ‍Versatile: You can choose from many colours and styles. ‍Resistant: They are durable, resistant to scratches and chemicals. ‍Easy to clean: All you need is a broom and a damp cloth to keep them clean. ‍Jointless: The continuous joint-free surface is more hygienic and easier to maintain. ‍Eco-friendly: Some resins are recyclable and environmentally friendly. ‍Suitable for underfloor heating: They work well with underfloor heating. ‍Quick installation: They can be installed quickly, reducing waiting time. We build together Something Extraordinary Your trust, our commitment: Isoline has a rich portfolio of completed projects, a symbol of our competence and reliability. For all your needs, from renovation to waterproofing, we rely on our experience to guarantee tailor-made solutions and excellent results

Lavoro eseguito con cura. Tempistica rispettata. Ottimo rapporto qualità/prezzo

CURIOSITIES & EVENTS - CONTACTS 🔨 Since the 1960s, Giannini Graniti has been dedicated to granite processing, developing increasingly sophisticated technological expertise. 🏗️ 🏭 The production organization allows for the swift fulfillment of any order with any type of processing. ⏳ 🏅 The company was the first in its field to obtain ISO 9001 , ISO 14001 certifications, and the Ticino label. ✅ 🌍 Thanks to the dynamism of the Giannini family , Giannini Graniti of Lodrino has been, and will certainly continue to be in the future, a company focused on tomorrow . 🚀 🛠️ Products & Catalogs : • Tables 🪑 • Pergolas 🌿 • Paving 🏞️ • Windbreaks 🌬️ • Grills 🍖 • Sofa Leaving 🛋️ • Furniture 🏠 • Coffee tables 🪟 • Benches 🪑 • Outdoor stairs 🏞️ • Window sills and thresholds 🪟 • Palisades 🌳 • Facing walls 🧱 • Wall stones 🪨 A modern and innovative way to work with granite! ✨

Materiali da tutto il mondo: marmo,granito,parquet e grès. Molto professionali e con esperienza pluriennale (da 100anni a Locarno). Prezzi competitivi. Hanno anche mobili e accessori in pietra moderni fantastici

Lavoro svolto con serietà e puntualità. Professionalità assicurata. Qualità prezzo del lavoro ottimo. Consigliatissimo!