Rock construction
Rock excavation, grouting, bolting, shaft reinforcement and drainage. We also specialise in formwork and concreting for underground structures and structures cast against rock.
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LONG-STANDING ROCK BUILDERS.
A Finnish company specialising in rock and concrete construction. Our owners, Heikki Hosionaho and Timo Redsven, are long-standing rock construction professionals.
What we do
From bedrock to structural frames.
We serve developers and contractors in three areas, from rock excavation to finished concrete structures.
Concrete construction
Foundations and structural frames for residential and commercial buildings, among others. Cast-in-place concrete from start to finish, plus concreting of civil defence shelters, sprinkler tanks and pressure walls.
Renovation
Reinforcement concreting and alterations to existing structures.
The company in brief
Team Hemppa Oy is a Finnish company specialising in rock and concrete construction. Heikki Hosionaho founded the company in 2013, and today it is owned by Heikki Hosionaho and Timo Redsven, both long-standing rock construction professionals.
We work as a subcontractor and staffing partner for construction companies, public sector organisations and private builders. Depending on the need, we provide individual professionals, complete shifts or independently managed sites. Our projects have included mines, metro tunnels and stations, underground spaces for a hospital and a wastewater treatment plant, and concrete structures for hotels and logistics centres.
Our experienced team of 56 works flexibly around the clock and is used to schedule-critical projects. Timo Redsven is our CEO, and since 1 September 2026 Mika Puistosalo, who has more than 30 years of experience in tunnelling and mining, has been our COO. Team Hemppa AB, founded in 2022, serves tunnelling and mining projects in Sweden.
In October 2026 the company was granted RALA qualification in two fields: building and installation work, and rock construction.
Expertise
The full underground excavation process and demanding concrete structures.
Flexibility
A single professional, an entire shift or an independently managed site.
Reliability
Safe working practices, quality workmanship and agreed schedules.
Since 2013.
- 2013
Company founded
Heikki Hosionaho founds Team Hemppa Oy. The focus is on rock construction: tunnelling, excavation and reinforcement.
- 2017
Concrete construction begins
Operations expand into cast-in-place concrete and reinforcement concreting for renovation.
- 2022
Expansion to Sweden
Team Hemppa AB is founded to serve tunnel construction projects in Sweden, including the Nacka metro tunnel site.
- 2026
56 professionals
The workforce has doubled since 2025. The company is granted RALA qualification.
RALA qualification
Building construction and installation work, and rock construction. Awarded to Team Hemppa in October 2026.
Enquiries and quotations
REQUEST A QUOTE.
Tell us about your project, its schedule and the expertise it requires. We will get back to you with a quotation or to arrange a more detailed discussion.
Contact us