Woller Oy

Steel con­struction specialist

in the Nordic coun­tries and also Germany

We are your partner even in demanding steel projects

Woller Oy was founded in need at the beginning of 2019. We spe­cialize in the assembly and main­tenance of steel con­struction work. Our project targets include power plants and indus­trial buildings - in addition we are also cer­tified to work at Nuclear Power Plants.

We are cur­rently working at the OL3 NPP Nuclear Power Plant site in Olkiluoto 3 and as the project is in its final phase right now our expertise will also be used for other projects.

We put into practice your metal needs from design to implementation

Our strong expertise enables the imple­ment­ation of steel assem­blies even for demanding pro­jects. If necessary we take care of project from the beginning to the end - from design to imple­ment­ation and installation.

It is also pos­sible to order smaller units from us according to the wishes and needs of you Our company is ded­icated to work according to high safety standards and taking into account all safety risks. We con­tinu­ously train our per­sonnel in accordance with safety regulations.

In addition to Finland and the Scand­inavian region we also operate in Germany where our cus­tomers are served by our own contact person.

Examples of our ser­vices and know-how 

  • HPEM pro­tection
  • Welding according to cus­tomer require­ments with cer­ti­ficates 111/135/136/141
  • High quality doors and gates for nuclear power plants, power plants and other projects
  • Design and install­ation of struc­tural fire pro­tection in cer­tified HILTI systems
  • Fire pro­tection, physical pro­tection, radi­ation pro­tection and air­craft col­lision pro­tection for high-level safety struc­tures, such as nuclear power plants
  • Install­ation of facades according to cus­tomer wishes and needs

In cooper­ation with Sommer GmbH

We cooperate with SOMMER FAS­SADENSYSTEME-STAHLBLAU-SICH­ER­HEIT­S­TECHNIK GmbH & Co. KG. KG in Scand­inavia and Germany.

Woller Oy is the only qual­ified and cer­tified sup­plier and service pro­vider for all doors and spare parts pro­duced by SOMMER GmbH in the Nordic coun­tries, for example at the OL3 Nuclear Power Plant.

We are Reliable Partner

Woller Oy is a member of Reliable Partner in the Vastuu Group – program.

Luotettava Kumppani


We have strong years of exper­ience and expertise in our field. Contact us and we will discuss more about your project needs and wishes.

Contact persons in Finland:

Vladimir Mostka

Site Manager / QHSE Supervisor

Minna Vilhula

Admin­is­trative Assistant


Lep­päkaari 2
86100 Pyhäjoki