We offer an all-inclusive service in the field of waterproofing, insulation, sheet metal work, resins, and industrial flooring. Our expert team is available for on-site inspections, individual consultations, studying optimal detailed solutions, preparing initial cost estimates, defining final execution needs, providing comprehensive offers for all examined works, securing the construction site, carefully executing the planned works, inspecting the final works, issuing an insurance guarantee, and offering post-sales advice. Our craftsmen are equipped and regularly updated on new construction trends and technologies. We guarantee synergy with third-party craftsmen on the construction site, as well as experience and punctuality in compliance with project schedules.

The Riesen Building Technology AG is a company with tradition and experience. We are your specialist for building technology. Here you will find personal and competent advice. The plumbing, heating, and roofing company Arthur Riesen AG was acquired by Daniel von Mühlenen in 2003 and transformed into Riesen Building Technology AG. Riesen Building Technology AG took over all 3 employees. Son Andres successfully completed his first apprenticeship as a roofer at LWB in Bern in 2006. After his apprenticeship in 2007 as a plumbing installer at Chapuis & Zürcher AG in Bern, he deepened his professional knowledge for another year. In 2010, Andres successfully obtained his 3rd Federal professional title as a heating specialist in building technology planning at Haustechnikplanung Abbühl in Spiez. To gain further professional experience, he also worked at Böhlen AG in Bern. In 2010, Andres joined the company at 40%. Since 2012, he has been acting as managing director. He is supported by his dedicated, long-standing plumbing and heating installers as well as a trained roofer. Our Services - Plumbing - Heating - Roofing - Lightning protection - Fireplace construction - Bathtub replacement - Solar - Enamel repairs We are happy to be your contact for work around your home. Customer satisfaction is of great importance to us. We guarantee this through quality, performance, and price. The building envelope has many requirements to fulfill. We are happy to assist you. From planning to complete execution. We are professionals with appropriate training. We don't leave our customers out in the rain.

On January 1, 1985 we founded the company DUO TOP SERVICE Ltd. The TOP SERVICE stands for our top service. The somewhat unusual name comes from the fact that we did not only offer ourselves as plumbers, but also wanted to carry out various other works. For example, our advertisement said: 'Execution of plumbing, roofing, gardening, painting, demolition and cleaning work, as well as other services'. Which was quite well received in the early years. But soon the workload as plumbers had grown to such an extent that we had to devote 100% of our time to this task. In the following time we were able to realize large and interesting projects. Also special orders like ridge turrets, weather vanes, gargoyles and ornaments are among our references. In 2016 our team doubled in size and we welcomed our two sons Mike Bussinger and Patrick Feusi, who successfully completed the foreman school in November. Shortly afterwards, Patrick Feusi decided to continue his professional further education, Patrick Feusi decided to add the master school to his professional training. He was then able to successfully implement this in conjunction with a large plumbing company. To fill the gap at Duo Top-Service GmbH, we were able to recruit Pascal Bussinger to our team. He also successfully completed the foreman school at his previous employer. Now the world's largest "Duo" is looking forward to future tasks and challenges. Your Duo Top-Service Team References Call now