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Hirsch Gebäudehülle GmbH has been your trusted specialist since 2007 for pitched and flat roofs, sheet metal works, liquid waterproofing, window sills, roof maintenance and photovoltaic systems . We deliver durable, high-quality solutions for new builds, renovations and ongoing maintenance – all from one source. Our projects are completed with precision, transparent planning and on-time execution across Thurgau, St. Gallen, Zurich and throughout Switzerland. Sustainable materials and smart energy solutions ensure long-lasting protection and efficiency.

Dönni Solar & Bau provides customized solar solutions for residential and commercial clients. From consultation and planning to the installation of photovoltaic systems, we focus on sustainable energy and top-quality service. Our expertise includes roof renovation, building technology, and energy efficiency solutions. Benefit from eco-friendly solar power and optimize your energy costs. With cutting-edge technology and years of experience, we help you transition to renewable energy.

For over a year, RUTECH GmbH has been delivering innovative and sustainable solar technology solutions throughout Switzerland. We design, install, and maintain customized photovoltaic systems for both private homes and businesses. Our mission: helping you gain energy independence through clean, renewable power. Rely on high-quality service, honest advice, and cutting-edge Swiss technology.

For over 90 years, WEBER AG in Amriswil has been your trusted regional expert for roofs, facades and solar installations. Whether flat or pitched roofs, roof greening, façade renovation or photovoltaic systems – we deliver tailor-made and sustainable solutions. As a certified member of Swissolar and the Building Envelope Association, we combine craftsmanship, efficiency and modern design. Quality and reliability from consultation to installation – all from one source.

Sustech, as an independent engineering firm for energy and building technology, offers all services from energy consulting to planning and monitoring. We support builders in residential areas as well as in administration, schools, nursing homes, gastronomy, industry, and more. Our primary goal is to optimize sustainability and comfort. • GEAK • Energy Consulting • Building Physics • HVAC Planning • Fossil-Free Heating • Photovoltaic Planning