100% bioenergy

Production that produces more energy than it uses

The global consumption of energy is increasing exponentially as more people than ever consume more energy than ever. New solutions are needed. Wood is a great renewable resource, but just burning it to produce energy would be a senseless waste. The construction sector uses a major part of global energy - and a large part of it goes to producing building materials. Engineered wood can be produced in a way which generates more bioenergy than it uses.


100% bioenergy - Lohja Kerto® LVL mill 

Over 100% energy self-sufficient mill

Bio heating plant next to the mill

A significant part of global energy consumption is eaten up by the production of steel, aluminium and concrete. Wood is a very sustainable alternative. The Metsä Wood mill in Lohja, Finland, produces Kerto® LVL (Laminated Veneer Lumber). First, as much of the wood as possible is used for Kerto LVL. Part of the sawdust and wood chips that are generated in processing the engineered wood are used in pulp production, and the rest for bioenergy for running the mill. At Lohja, the bio heating plant has been built next to the mill in order to capture the full potential of the production.  The heat energy produced at the plant covers the needs of the mill, which makes the Lohja Kerto LVL mill 100% energy self-sufficient. In fact, there’s enough left for the surrounding community.  


Values guide Metsä Group's operations 


Sustainable energy production

Values guide Metsä Group's operations 

Powering a town as a by-product

The remaining heat from the Kerto LVL production process is sold for district heating to the town of Lohja. “The local bio heating plant is a significant support for reaching our ambitious low carbon energy goals,” says the mayor of Lohja, Mika Sivula. Lohja is part of Finland’s national scheme to reduce greenhouse gas emissions by 80% by 2030. According to the mayor, “due to the bio heating plant, we have accomplished our first milestone, 15% reduction of greenhouse gas emissions by 2016.”  The plant covers 80% of Lohja’s heating. “As the sidestreams of the Kerto LVL production, bark and woodchips, are utilised at the same plant, traffic emissions are reduced as well. All this makes our Kerto LVL an outstanding building material in terms of sustainability,” states Jouni Laakso, who manages both the Metsä Wood mill and the bio heating plant.

Sustainable construction material

Kerto® LVL (laminated veneer lumber) produced with 100% bioenergy 

Sustainable buildings require sustainability in material production

The focus of improving efficiency has to shift from the energy used to operate a house to the production of the construction materials - the most energy intensive phase in a building’s life cycle. The European ”Energy Performance of Buildings Directive” (EPBD) requires all new buildings to reach nearly zero energy class by 2020. Zero buildings, however, are not enough. Architect and researcher Matti Kuittinen says, “we have to evaluate the net energy balance over the whole life cycle and turn our attention to the production of the materials. The energy used to produce the materials of a building is 50 times more than the energy used to operate it for a year. As the production of wooden materials actually produces an energy surplus, the implications are clear: Wood should be used whenever possible.

Video: How Kerto® LVL is produced

Building with Kerto® LVL

What is Kerto® LVL (laminated veneer lumber) used for

Below you can see some examples of buildings using Kerto® LVL.

Watch also a Talking Wood video with Henk Moen talking about natural charm of wood.

Open Source Wood initiative

Open Source Wood: an open platform for innovative wood construction

In June, Metsä Wood launched its Open Source Wood project, where architects, designers and engineers are invited to join forces to innovate and share information relating to construction based on wood elements.

This project is a continuation of the Plan B campaign, and is aimed at expanding the market for urban wood construction by combining expertise from different countries. Metsä Wood is promoting element design by offering EUR 30,000 in prize money for element-based designs that make innovative use of Kerto LVL.

Read more and join the initiative

Published articles


Hybrid sandwich wall element – sustainable and efficient construction


Wood construction battles climate change through carbon storage


Fast revenue


100% bioenergy


Fast, Light and Green photo series