Rohr AG is a more than 90-year-old company with headquarters in Hausen/AG, which belongs to Investis Holding SA. With around 1,000 competent employees at 8 locations throughout Switzerland, we offer comprehensive services in the field of cleaning and cleanroom solutions.

Weiss Bau & Beratung - everything under one roof The specialist areas of timber construction, roofing and plumbing work hand in hand in the implementation and repair of roofs and facades of all kinds. The combination of these specialist areas makes Weiss Bau & Beratung AG a special provider in the construction industry. The advantages for the builder or the architect are obvious: only one contact person and responsible person and executing company. This saves time, costs and nerves. Whether new buildings, renovations, repairs, roof service or emergency service - with us you are guaranteed to find the right partner for your building project. We have a special focus on repairing damage to damp, flat roofs using the latest leak detection technology and reliable drying processes. In the event of storm or water damage on your roof, our emergency service is available before the damage increases.