Sita Bauelemente's Five-Decade Rise from Startup to Industry Leader
Sita Bauelemente GmbH has grown steadily since its early days in the 1970s. The company, known for polyurethane roof drains, recently marked another milestone by welcoming a new shareholder in late 2021. Its expansion over the decades reflects both strategic partnerships and major infrastructure investments.
The company’s origins trace back to the mid-1970s, when founder Karl-Heinz Gelsen teamed up with Paul Craemer GmbH. This collaboration focused on producing polyurethane (PUR) roof drains, with Sita initially leasing production and office space on Craemer’s premises.
By January 1988, Paul Craemer GmbH had acquired a 50% stake in Sita. Ownership later shifted entirely to Craemer Holding GmbH in December 2003. The business continued to expand, leading to the construction of a new headquarters in the Aurea Industrial Park between 2009 and 2010. The 16,000 m² site housed production lines, warehouses, and administrative offices. Further growth followed in 2018 with the addition of the SitaCampus, an office and training wing at the headquarters. More recently, a 7,800 m² logistics facility—complete with an 800 m² mezzanine—was built just 300 metres away on Ferdinand-Braun-Straße 5. By its anniversary year in 2026, the company employed 127 people and reported €44.2 million in revenue for 2025. The latest development came at the end of 2021, when Paul Bauder GmbH & Co. KG joined as a new shareholder.
Sita Bauelemente GmbH has evolved from a small tenant on Craemer’s site to a well-established manufacturer with modern facilities. Its revenue and workforce figures in 2025 and 2026 highlight steady progress. The addition of Paul Bauder as a shareholder marks another step in its long-term development.
