Innovation provider


Eike Roswag
Schlesische Straße 26 A
DE-10997 Berlin
Tel: +49 (0)30 398 00 95-0
Fax: +49 (0)30 398 00 95-66


In order to prevent constructive thermal bridges balcony, chimney and roof projection were removed. An existing rooftop exit was closed. Optimisation of heat insulation was implemented by front-added wood construction with a width of 30 cm filled with cellulose. Roof cavity was also filled with cellulose, which can easily be removed and recycled when the house comes to the end of its life cycle. Cellar ceiling was also insulated from both sides. Since a ventilation system has been installed, ventilation by opening windows is not necessary which saves heating energy in winter times and allows for comfortable temperatures during hot summer days. The building presented here was rewarded first price in the competition “Mehr Wert – Wärme aus erneuerbaren Energien” by the German energy efficiency agency (dena). 


Throughout Europe there is an enormous demand for energetic restoration (insulation reinforcement) using renewable materials due to rising energy prises and national CO2 mitigation obligations. The building sector accounts for roughly 40 % of the total energy consumption, almost 90 % of it energy goes into heating and sanitary hot water preparation. A considerable reduction of the energy demand in private homes as depicted here is crucial for CO2 emission mitigation, especially in existing homes since new built houses represent only 3 % of total buildings.
After applying the described thermal insulation measures, heating energy consumption could be cut to only 16 % of the consumption before restoration.  Additionaly, jobs can be shifted from petroleum refining industries to wood industry and agriculture. 

Innovative aspects (ecologic, social and economic)

It is important to use renewable materials for insulation reinforcement measures since synthetic materials are generated from the limited resource petroleum. Oil production and refinement itself require considerable amounts of energy which worsens the overall eco-balance. Moreover, recycling possibilities are limited. In contrast, renewable materials like wood exhibit a much better eco-balance, are available worldwide and basically unlimited. Thus, a sustainable way of restoring buildings can only be reached by applying renewable resources. 

Application examples

Construction; energy conservation 



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National Contact Point

Daniel de Graaf
Wörlitzer Platz 1
06844 Dessau-Roßlau

Tel. +49 (0)340 21033407
Fax. +49 (0)340 21043407