Diving and concrete construction services from a single provider!
About Unwa Oy
We specialize in repairing and constructing concrete structures through diving operations across Finland – both above and below the waterline. Our underwater construction and inspection work is carried out by our own professional divers.
We also offer ongoing maintenance and service agreements for harbors, hydropower plants, as well as pipeline and cable line infrastructure.
Diving services
Unwa Oy provides comprehensive professional diving services nationwide. We operate throughout Finland, ensuring that every project is carried out safely and smoothly. Our work is founded on solid expertise and a strong commitment to safety.
Concrete construction
We operate nationwide as an infrastructure builder specializing in concrete construction, civil engineering, and diving projects. With decades of experience in demanding sites and a versatile fleet of equipment, we deliver projects with high quality and on schedule – both above and below water.
Harbor Repairs and Maintenance
We carry out harbor repair projects for cities and municipalities across Finland. Our services include dock refurbishments, pontoon repairs, as well as the construction of supports and retaining walls. We also provide condition assessments with detailed reporting.
Customer Stories
Customer Testimonials
Veikka Välilehto
Site Manager, Oteran Oy“The work with Unwa Oy’s highly professional staff was carried out reliably and efficiently. Coordinating the schedules on the construction sites also went smoothly. We will certainly continue our cooperation in the future!”
Miika Mämmelä,
Ramago Oy“Working with Unwa Oy on-site has been completely seamless. The work is planned and carried out in a collaborative and positive spirit. Tasks are performed safely and with high quality, and working hours are used efficiently. Their strong work ethic is evident in everything they do!”
Samuel Ahokas
CEO, Laukaan Energia Oy“Cooperation with Unwa Oy has been extremely pleasant. The quality of work is excellent, and their performance inspires confidence. I want to build a long-term partnership with Unwa Oy!”
Harri Pouru
Maintenance Supervisor, City of Akaa“Collaboration with Unwa Oy has gone very well. The work has been completed according to the agreed schedule, and even though the project involved refurbishing an old guest marina pier, the cost estimates were very accurate.”
Aki Vanhala
Harbor Master, Jyväskylä Yacht Club (Jyväskylän Veneseura ry)“In June 2022, we carried out an inspection of mooring buoys and chains at the Juurikkasaari harbor of Jyväskylä Yacht Club. Unwa Oy performed the work with great professionalism and speed, and the inspection report was very detailed with photos and explanations. Later in the autumn, the necessary repairs were carried out, also by Unwa Oy, with the same high level of professionalism.”
Timo Pekkarinen
Site Manager, VMSV OY“Working with Unwa has been smooth. The work is efficient and professional!”
