CO2 Emissions
Specific CO2 Emissions

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Index of specific CO2 emissions 1
in % based on kg CO2 /ton (2013 = 100 %) 2013
2014 2 Change from
2013 in %
Clay blocks 100 92 – 8
Roof tiles 3 100 95 – 5
Facing bricks 100 98 – 2
Ceramic pipes 100 100 0
Ceramic production 100 96 – 4

1 Specific CO2 emissions now refer exclusively to fuel emissions.
Following the transition to the third EU emission trading period in 2013, Wienerberger’s data from previous years are no longer
comparable; therefore, CO2 emission data from 2013 serve as the new reference base for future developments.
2 Tondach Gleinstätten included.
3 The previous year’s figures were restated due to correction of the tonnage produced by one roof tile plant.

Group-wide reduction of specific CO2 emissions by 4% compared with 2013

As regards the index of specific CO2 emissions from primary energy sources, we also achieved significant reductions, compared with 2013, in almost all production areas. Our efforts were particularly successful in clay block production, where specific CO2 emissions were reduced by 8% from the previous year’s level. Taken together, specific CO2 emissions from all ceramic production plants of the Wienerberger Group were 4% lower than in 2013. The development of specific CO2 emissions from primary energy sources shows that there is a linear correlation with energy efficiency; the change-over to low-emission fuels adds to this positive development. Calculated on this basis, specific CO2 emissions from primary energy sources in ceramic production were 10% lower in 2014 than in 2010.

Index of specific CO2 emissions also reported per m² of surface for roof tiles and facing bricks

Efforts made within the Clay Building Materials Europe Division to reduce raw material input in production serve the goal of increasing energy efficiency and, at the same time, further improving the product properties. We have therefore decided to report the index of specific CO2 emissions from primary energy sources not only per ton produced, but also per square meter of product surface.

Index of specific CO2 emissions CBME 1
in % based on kg CO2/m2 (2013 = 100 %) 2013
2014 2 Change from
2013 in %
Roof tiles 100 94 – 6
Facing bricks 100 92 – 8

1 Clay Building Materials Europe
Specific CO² emissions now refer exclusively to fuel emissions.
2 Tondach Gleinstätten not included.

The reduction in specific CO2 emissions from primary energy sources is clearly noticeable in these two product groups. A 6% reduction was achieved in roof tile production and an 8% reduction in facing brick production.

CO2 emissions in cement production

A major part of the carbon footprint of Semmelrock’s concrete products is generated upstream in raw material production. Cement production is particularly energy-intensive and, consequently, CO2-intensive. Within the framework of the Sustainability Roadmap 2020, Semmelrock has undertaken to reduce these emissions, e.g. by implementing pilot projects investigating the use of recycled concrete and concrete produced by climate-friendly methods.

COemissions from transport of raw materials

Other types of indirect CO2 emissions, such as those caused by the transport of raw materials and finished products, are not covered in this report. According to the assessment of our stakeholders, such emissions only account for a relatively small part of the total carbon footprint of our products, compared with direct emissions from ceramic production and/or the CO2 intensity of the raw materials used in the production of plastic and concrete products. Nevertheless, within the framework of the Sustainability Roadmap 2020, Semmelrock is exploring the possibility of using more local suppliers in order to reduce transport-related CO2 emissions.

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