Project Evolution SA is a company specialized in the construction of energy-efficient wooden houses and buildings. With over 20 years of experience and an operational headquarters in Grono (Canton of Graubünden) since 2020, it is organized to operate throughout Switzerland , managing every construction phase: from planning to final delivery. We work with Swiss precision and a rigorous technical approach, focusing on site organization, timeline compliance, and cost transparency. Structures and Building Systems • Wooden structures using X-LAM system with high static and energy performance • Prefabricated eco-friendly walls , with battens, double mineral wool insulation, and breathable finishes • Custom solutions for single-family homes, villas, extensions, elevations , and multi-storey buildings (up to 7 floors) Insulation and Living Comfort • Natural breathable insulation in rock wool or wood fiber • External thermal insulation systems using ecological, high-efficiency materials • Drywall partitions and suspended ceilings , perfectly smoothed and finished • Carefully executed interior finishes: smoothing, leveling, and surface preparation Interior Works and Installations • Supply and installation of high-efficiency windows and doors • Interior wall cladding and partition walls in drywall • Full coordination of technical installations (electrical, plumbing, mechanical ventilation) Sheet Metal and Roofs • Construction of ventilated and waterproof roofs • Custom-made metal sheet works : copper, aluminum, stainless steel • Gutters, flashings, chimney caps, and external finishes with maximum attention to detail Logistics and Material Transport Even the most complex construction sites are no challenge for us: we transport materials using any necessary method, including crane trucks, tractors, helicopters , or special solutions for isolated or hard-to-reach areas. Efficient organization is one of our core values. Why Choose Project Evolution SA • ✅ Over 2,000 projects completed in Switzerland and Italy • ✅ Advanced shell approach , with a single technical point of contact • ✅ Accuracy in installation, hidden details, and site management • ✅ On-time and on-budget delivery, no surprises • ✅ Expertise in eco-construction and certified natural materials • ✅ Solid experience with prefabricated and sustainable buildings Building with wood in Switzerland? Trust Project Evolution SA We create your eco-friendly wooden house, your sustainable building, or your custom project with maximum technical competence and attention to detail. From design to installation – we are by your side at every step. 📍 Active throughout Switzerland – Contact us for a quote or a personalized consultation.

A bit of history... Founded in 1989, Betoncut SA in S.Antonino has over 30 years of experience in the field of cutting, core drilling, and controlled demolition of many materials commonly used in construction. CORE DRILLING: • Core drilling of reinforced concrete elements • Core drilling in natural stone elements • Core drilling in artificial stone elements • Core drilling up to a diameter of 3000 mm • Core drilling in asphalt elements CUTTING: • Cutting of reinforced concrete elements, doors, windows, etc. • Cutting of natural stone walls • Cutting of artificial stone walls • Cutting of rock DIAMOND WIRE CUTTING: • Can be used anywhere in any situation, without noise and vibration • All building materials DEMOLITION WITH HYDRAULIC PLIERS: • Controlled demolition of slabs, walls, stairs, pillars, etc. with pliers DESIGN AND QUOTES: Contact us

Experts in plumbing, heating, heat pumps and 24/7 emergency service – Bellinzona and Mesocco NEGRETTI IMPIANTI SANITARI E RISCALDAMENTI SAGL , based in Bellinzona with a branch in Mesocco (Italian-speaking Grisons), is a trusted provider of plumbing, heating and energy systems in Ticino and surrounding areas. The company is led by Marco Grassi and is a proud SUISSETEC member . We offer full design, supply, installation and repair services for: • Sanitary systems for bathrooms, showers, kitchens, and changing rooms • Plumbing systems for residential and commercial buildings • Heating systems , including underfloor heating • Cooling, ventilation and air-conditioning systems • High-efficiency heat pump installations • Garden and landscape irrigation systems • Systems with conventional or renewable energy • Emergency support / 24/7 on-call service We use modern technologies and eco-friendly solutions tailored to your needs – for new builds , renovations , or urgent repairs , our team is ready to deliver reliable and efficient service. Contact us for a free quote or urgent support.

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.

Professionalià ed efficenza