2. a new envelope in a prefabricated timber construction
the old building is still visible underneath

3. only small changements of the existing structure
addition of new rooms and wintergardens

4. one or two additional storeys with new apartments
larger rooms, more glass

5. the basement with direct access from the parking lot

6. added communication zone and staircase

7. the added parts on separate load bearing walls and foundations

8. a new skin in massive timber revealing parts of the old structure

9. a natural landscape for the children and adults
underneath underground parking
and geothermal energy fields

10. the energy system
combining geothermal energy and solar thermal collectors
ventilation of the apartments
photovoltaics on the roof

12. the construction system
all additional parts in a prefabricated, light weight timber construction

13. impressions of the proposed timber constructions
production of prefabricated elements
computer integrated manufacturing

14. very precise details
traditional connections by computer processing

15. prefabricated timber-concrete slabs without steel
only little grey energy
good sound insulation, good thermal mass

16. assembling the elements on the building site

17. Addition of a new skin
research project together with CCEM (EMPA), FHNW und HSLU
Pilot- and Demonstration Object of the Swiss Federal Department of Energy

18. apartment building Zürich-Höngg, 2009
Minergie-P ZH-071, zero energy building
Swiss Solar Prize 2010

19. apartment building Zürich-Wiedikon
Minergie-P- ZH-050
Isover Energy Efficiency Award 2011

20. the energy system
combining geothermal energy and solar thermal collectors
ventilation of the apartments
photovoltaics on the roof

21. a natural landscape for the children and adults
underneath underground parking
and geothermal energy fields

22. a modern building with the old parts still visible