Hof 6, Schwarzenberg, Voralberg, Austria
book “ Umgebaute Bauernhäuser in Vorarlberg” by Florian Aicher und Hermann Kaufmann
State of repair
Aim of retrofit
Hof 6, Schwarzenberg
6900 Bregenz, Amtsplatz 1
Gerbe 1135, 6863 Egg, austria
Hygrothermal assessment non
Life Cycle Analysis (LCA) non
wood block wall
Block knitted wall 12-13cm, inside paneled, - supplemented by 2 layers of soft fibre - Wood wool insulation with laths, - wind sealing sheet - Rear ventilation and shingle formwork (for space reasons partly without rear ventilation) (contrary to the energy certificate only wood wool products were processed)
The intervention could be done underneeth the wooden shingles. Not to become to deep window- holes the architect did not take a much better (thicker) insulation.
Box windows front building
The old box windows had to be renewed but for the safety of the wall components the U-Values did just change slightly withe the new common glasses.
For the appearance of the building at the centre of Schwarzenberg the windows had to stay the same. The windows have two separate window elements. In summer it is possible to take away the front part of the window. The old frames were taken again.
MEASURES TO INCREASE AIRTIGHTNESS
The renovation was the chance to renew the roof, becaus it was not leekproof anymore. It was in bad condition, had an ammonia smell in the barn and had to be completely renewed. The biggest change of the roof was the installation of a thermal solar system and a big glazed opening.
The saddle roof is part of the city centres ensemble and therefore it had to stay the dimension it had before.
The barn had no base plate before and with the extension of the main building this changed. The ground floor became an insulation from underneath/the basement.
The conservation did not change the material of the ground. in many parts of the existing living area, the ground was covered by linoleum. The new owner just used wooden boards.
In addition to the front door on the street side, access to the house was also possible via the car park/rear entrance. This was otherwise used as a porch. For the lighting in the rear part of the house, parts of this this porch wer now fully glazed.
Although the appearance of this conservatory is very different from the original one, the benefits are the same.
The architect managed the airtightness with two layers of softwood panels without any foils or better without any serrender layers.
DOMESTIC HOT WATER
The old system was an oil heating system which did not fit to the new building anymore.
The owner didn't change the heating distribution system and just renewed the radiators with new but old looking radiators from Zehnder.
A new thermal solar system was installed, which provides hot water for the two flats at least during two third of the year. If required the pellet boiler takes the rest.
The solar system is a roof integrated system.
RENEWABLE ENERGY SYSTEMS
The systems provides hot wate for the two families almost during three quarter of the year.
Roof-integrated collector solution with special modules between the rafters (this special solution was approved at the request of the monument office and the planning department) with attached shed glazing, analogous to the adjacent roof glazing for the lighting.
A pellet boiler did replace the oil heating system.
The former farm house has an tiled stove which has no historical importance.
Voluntary certificates: No
Consumption_estimation_After: 73 kWh/m2.y
There are no cost aspects available.