Cervi expands technical insulation services in Eastern Finland – Trekman Oy joins the group

Founded in 2008, Trekman Oy specialises in HVAC and building services insulation, industrial insulation and industrial maintenance. Its customers include HVAC and construction companies as well as industrial companies.

Trekman has a strong local presence. The company is based in Joensuu, and its service area covers North Karelia and nearby areas in Eastern Finland.

Broader indoor climate and building services technology expertise in Joensuu

Cervi strengthened its presence in the region earlier in 2026, when Itä-Kylmä Oy, a specialist in refrigeration and heat pump technology, joined the group. Trekman now adds local expertise in technical insulation. Together, the companies strengthen Cervi’s service capabilities in Joensuu, North Karelia and across Eastern Finland.

Technical insulation is one of Cervi’s four business areas, alongside ventilation, refrigeration and energy solutions. It is an integral part of effective indoor climate and building services technology, contributing to the energy efficiency and reliable operation of buildings and technical systems.

“Trekman brings strong local expertise in both building services and industrial insulation. In Joensuu, this complements Itä-Kylmä’s expertise in refrigeration and heat pump technology and enables us to offer customers a broader range of solutions in indoor climate and building services technology. Trekman also strengthens our growing nationwide insulation business,” says Jarno Hacklin, CEO of Cervi.

Local operations continue as part of a broader network

Trekman Oy will continue to operate as part of the Cervi Group. The company will retain the strengths of its local operations and established customer relationships while gaining access to Cervi’s broader expertise and resources.

“Cervi has grown and developed with a clear sense of direction, and it was important for us to join a forward-looking organisation. As part of Cervi, we can provide stability for our employees, continue developing Trekman and make our insulation expertise available to customers more widely across Finland. At the same time, we want to remain a local company and continue serving our customers in the way they know. We look forward to what we can build together,” says Jarno Tolvanen, CEO of Trekman Oy.