Finland’s tallest apartment block constructed from wood, located in the Vierumäki area of Heinola, will reach the roof-raising phase in June.
The walls for the building will be delivered as ready-to-install elements from Herrala Houses’ house factory, located a few kilometres from the construction site. In mid-May, the final elements for the fourth floor of the five-storey building were completed at the factory, and the first two floors were completed at the construction site.
- The wall elements for the first two storeys took a bit more time than planned, but now we’re back on schedule. This will probably also be the case for the installation of the wall elements. The wall elements for a wooden apartment building differ from those of detached houses not only in their size, but also in their structure. The work methods and procedures have evolved through experience, explains Janne Inkinen, Development Engineer with Herrala Houses.
The other builders, in addition to Koskisen, are the City of Heinola, Versowood Oyand the main contractor for the site, Rakennusliike Reponen. Contrary to normal building element deliveries, Herrala Houses is not responsible for installing the wall elements for the apartment block; instead, installation of all the prefabricated wood elements is being carried out by an installation team hired by the main contractor.
Around ten installation workers employed on the construction site are in the process of building a concrete bunker next to the building. The block integrates materials and construction methods in a new way, and the energy consumption of the eco-efficient building will equal the level of a passive building. The building will be heated with district heating produced with renewable fuels.
- Concrete is used in the building only in the foundation, elevator shaft and on top of the intermediate floors. Apart from those, the entire building is made of wood, Inkinen says.
In addition to the building’s facade, wood is also visible in the posts, beams and stairs of the stairwell and balconies. Technical fire regulations limited the use of wood in the interior of the building.
- Once we have finished manufacturing the prefabricated elements, our part in the project ends. Then we just watch with keen interest as the building is completed, Inkinen says.