Baur Residence, Lustenau
State of repair
Aim of retrofit
plan 3 GmbH
Scheidbuchen 752, 6866 Andelsbuch
Rehmen 160, A-6883 Au, Bregenzerwald
External wall residential wing
External wall former barn
The exterior walls were insulated on the outside and newly shingled.
The shingle façade preserves the original character of the Rheintalhaus.
The former barn now houses bedrooms and bathrooms. Therefore the uninsulated wooden walls had to be thermally improved.
From the outside, the barn, including the large canopy, was left in its original condition in order to preserve the character of the Rhine Valley house. The façade was repaired with old wood so that today it is hardly possible to tell the difference between what is old and what is "new - made to look old".
The windows from the 1960s were replaced and building sins were eradicated by partially moving the windows back to their original place. This not only restored the character of the Rhinevalley house, but also brought more daylight into the building.
The existing windows on the upper floors were replaced by windows in passive house quality. A skylight was installed in the corridor in order to bring additional daylight into the house.
The roof was completely renewed. A skylight was installed in the corridor, allowing light to enter the living room and the terrace area. An additional ceiling was installed in the former barn.
The roofing was kept in the style of the old roof and thus corresponds to the original character of the building.
Due to the extension of the upper floors of the former barn, the ceiling had to be insulated against the ground floor. The U-value of the ceiling against the garage or storage rooms is 0.11 W/(m²K).
DOMESTIC HOT WATER
In the original building, the upper floor was conditioned by a combination of oil heating in the kitchen and individual electric stoves, for example in the bathroom. In the existing building neither all rooms could be heated nor were the heated rooms continuously heated. The heating of the object after the renovation is provided by a pellet central heating system and a tiled stove.
In the existing building, the hot water was provided by an electric boiler with a useful capacity of 120 liters. After the renovation, the pellet central heating system also serves for hot water preparation. In addition, a 10 sqm thermal solar system was installed on the roof of the farm building.
RENEWABLE ENERGY SYSTEMS
On the east-side facing roof of the utility building a 10 m² solar thermal system was installed for hot water preparation. Due to the orientation and the 44° roof pitch, approx. 40 percent of the hot water demand can be generated by the solar system.
The thermal solar system is roof-integrated.
The heating and hot water supply of the object after the renovation is provided by a pellet central heating and a tiled stove.
Voluntary certificates: No
Primary Energy 7,6 kWh/m2.y
Consumption_estimation_Before: 6,000 kWh/y
Consumption_estimation_After: 38 kWh/m2.y
Consumption_estimation_Calculation_method: Steady state simulation (e.g. EPC, PHPP)
Consumption_estimation_After: 7,6 kWh/m2.y