GENERAL INFORMATION RENOVATION PROCESS RETROFIT SOLUTIONS EVALUATION

Baur Residence, Lustenau

Lerchenfeldstraße 13

6890

Lustenau, Austria

architetto

plan 3 GmbH

Scheidbuchen 752, 6866 Andelsbuch

Owner

Vincent & Manuela Baur

Lerchenfeldstraße 13, 6890 Lustenau, Österreich

User

Fam. Baur

6890 Lustenau, Austria

Contact Details

Johanna Müller

Energieinstitut Vorarlberg

johanna.mueller@energieinstitut.at

Other Information

View South after Renovation ©www.studio22.at

"Cozy, comfortable, plesant - our home! The atmosphere of old and new, the special character and the history that come with an old house, make it something special. Based on experience we can say: dare to preserve old building fabric. You won't regret it!" says the owner. Built in 1878, the house has always been owned by the same family. In 2011 the Rhine-valley house was renovated by the great-great-great-grandson of the builder with a lot of passion and love for detail.

GENERAL INFORMATION RENOVATION PROCESS RETROFIT SOLUTIONS EVALUATION

Energy performance

38 kWh/m2.y

Climate Zone feuchtes und warmes Kontinentalklima Cfb

Altitude 404 s.l.m.

HDD 3460

CDD 63

Protection level Not listed

Conservation Area:
No

Level of Protection:

Building age 1850-1899

Year of last renovation:
2011

Year of previous renovation:
1950

Building use Residential (rural)

Building occupancy:
Permanently occupied

Number of occupants/users:
4

Building area Net floor area [m²]: 208,0

Building typology:
Detached house

Number of floors:
3

Basement yes/no:
No

Number of heated floors:
2

Gross floor area [m²]:
285,0

Thermal envelope area [m²]:
573,08

Volume [m³]:
764,1

NFA calculation method:
NGF (de)

Construction type

Timber frame

External finish:
The external walls are plastered (ground floor) as well as shingled (upper floors).

Internal finish:
The internal walls are partly plastered and partly clad with wood. The internal wall to the former utilitiy wing is a raw quarry stone fire wall.

Roof type:
Pitched roof

+ MORE - LESS

Kitchen after Renovation ©www.studio22.at

View South before Renovation ©Vincent Baur

Terrace after Renovation ©www.studio22.at

Bedroom after Renovation ©www.studio22.at

Living room before Renovation ©Vincent Baur

Interior Window after Renovation ©www.studio22.at

Surface Broaching after Renovation ©www.studio22.at

Exterior view after Renovation ©www.studio22.at

Living room after Renovation ©www.studio22.at

Detail window after Renovation ©www.studio22.at

Exterior View after Renovation ©Vincent Baur

Exterior View before Renovation ©Vincent Baur

RENOVATION PROCESS

Architecture

BUILDING DESCRIPTION

The Rhine valley house was supposabley built in 1878 by the great-great-great-grandfather of the present owner. It was built in the elongated one-yard form, which is typical for Rhine valley houses. Living and utility areas are thereby located under one roof. In the Baur house, the southern part of the house was used for both living and working purposes. Originally, the ground floor was used as a pottery for stoves. After 1900, the building was extended by an embroidery shop, typical for the region with its then emerging textile industry. The upper floors were - and still are today - used as living quarters. Until the 1990ies, the northern part of the building served as a utility wing, with stables for goats, sheep and chicken and for storage. In the course of the renovation in 2011, the old building fabric and external appearance were largely preserved. In the process, building sins from earlier renovations were also eradicated. Through thermal measures the energy demand was reduced by 45%, even tough the usable floor space was increased by 30%. The outer walls of the residential wing were insulated and provided with a new shingle façade. The utility wing was hardly changed from the outside, but a ceiling was installed and the old storage rooms were converted into living room, bedroom and bathroom. The former embroidery shop on the ground floor has been preserved, but serves as a hobby and "party room" now. For the future, a further extension of the ground floor or a small apartment on the 2nd floor / attic floor would still be possible. In the interior, with the help of friends and acquaintances, numerous layers of wall and floor construction were removed in painstaking and loving work and the exposed wooden walls and beams were brushed down in elaborate manual work.

Urban context

The building is located in the middle of a residential area with single and multiple family houses. Some small to medium sized office and industrial buildings are also located in the area as well.

State of repair

Conditions of the envelope

Before the renovation, the building showed clear signs of use, was old and rather unattractive. The thermal quality of the building was also in need of significant improvement, the windows were leaking, the exterior walls and the roof were not insulated.

Description of pre-intervention building services

Before the renovation, the building was heated by an oil heating in the kitchen an an electric stove in the bathroom. Hot water was supplied electrically.

HERITAGE SIGNIFICANCE

ELEMENTS WORTHY OF PRESERVATION

Historical elements of the Rheintalhaus that are worth preserving are on the one hand, the typical one-yard form with the residential and business section, and on the other hand, the basic external structure, such as the roof form, the shingled façade of the residential wing and the boarded-up wooden façade of the utility wing.

Heritage Value Assesment

The house Baur is not under monumental protection. However, it is a typical representative of the Rhine Valley house due to the "Einhof" shape (residental and utility spaces are located in the same building), the ridge of the utility wing being on the same height as the residential wing, the combination of bricked lowermost floor (often cellar floor, here ground floor) and timber frame on the upper floors, the shingled facade of the residential wing as well as the characteristic bend in the roof.

Aim of retrofit

Renovation + Extension

Aim of the retrofit was to combine modern functionality with the revival of old building fabric. As author of the historical illustrated book "Lustenau in alten Ansichten" ("Lustenau in old views"), the owner of the house has a great passion and fascination for old buildings. With their own housing project, they want to encourage others to renovate old buildings.

Was there any change of use?

The utility wing in the northern part of the building was extended and adapted for residential purposes in the course of the renovation. What was once storage for storing hay and agricultural equipment, is now used as living room, bedroom and bathroom. The former embrodery shop on the ground floor is now used as a party room.

Lessons learned

"Renovating an old object is a lot of work, but the satisfaction counts more. The joy of restoring the old substance and combining it with modern functionality is an exciting process."

Stakeholders Involvement

Architect
plan 3 GmbH
Scheidbuchen 752, 6866 Andelsbuch

Other
Holzbau Muxel
Rehmen 160, A-6883 Au, Bregenzerwald

Tools used

Was the renovation process done following a specific methodology? No

Energy calculation Energieausweis

RETROFIT SOLUTIONS

External Walls

External wall residential wing

External wall former barn

External wall residential wing

The exterior walls were insulated on the outside and newly shingled.

The shingle façade preserves the original character of the Rheintalhaus.

U-value (pre-intervention) [W/m2K]: 0,51 W/m²K U-value (post-intervention) [W/m2K]: 0,15 W/m²K

More Details

Original wall build-up

Wood - Holzschindelung :
25 mm

Air gap - Hinterlüftung :
40 mm

Wood - Holzstrick:
150 mm

Retrofitted wall build-up

Wood - Holzschindelung 2-lagig:
55mm

Air gap - Hinterlüftung und Winddichtung:
40 mm

Insulation - Mineralwolle zwischen Lattung:
200 mm

Wood - Holzstrick - Bestand:
150 mm

Air gap - Installationsebene:
30 mm

Wood - Rauhspund:
20 mm

Cladding - Gipskartonplatte:
13 mm

External wall former barn

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".

U-value (pre-intervention) [W/m2K]: 2,7 W/m²K U-value (post-intervention) [W/m2K]: 0,226 W/m²K

More Details

Original wall build-up

Wood - Holzfassade:
25 mm

Wood - Holzrahmenkonstruktion:
140 mm

Retrofitted wall build-up

Wood - Holzfassade:
25mm

Insulation - Mineralwolle zwischen Lattung:
140 mm

Other - Winddichtung:
1 mm

Insulation - Mineralwolle zwischen Lattung:
25 mm

Wood - Rauhspund:
20 mm

Cladding - Gipskartonplatte:
13 mm

Windows

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.

Window after Renovation ©www.studio22.at

Existing window U-value Glass [W/m2K]: 2,7 New window U-value Glass[W/m2K]: 0,5 Existing window U-value Frame [W/m2K]: 2,7 New window U-value Frame [W/m2K]: 0,97

More Details

Existing window type	Sash window
Existing glazing type	Single
Existing shading type	Outer shutter
Approximate installation year	1965

New window type	Sash window
New glazing type	Triple
New shading type	Outer shutter
New window solar factor g [-]	0,49

Other interventions

ROOF

OTHER

ROOF

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.

Roof terrace after Renovation ©www.studio22.at

U-value (pre-intervention) [W/m2K] 1,42 U-value (post-intervention) [W/m2K] 0,18

More Details

Original roof build-up

Tiles - Dachziegel:
30 mm

Other - Holzunterkontruktion:
20 mm

Retrofitted roof build-up

Tiles - Dachziegel:
30 mm

Other - Holzhartfaserplatte:
4 mm

Other - Dämmung zwischen Sparren:
160 mm

Other - Dämmung zwischen Lattung:
80 mm

Other - Dampfbremse:
1 mm

Other - Hinterlüftung:
30 mm

Other - Gipskartonplatte:
13 mm

OTHER

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).

HVAC

HEATING

DOMESTIC HOT WATER

HEATING

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.

More Details

	New primary heating system	New secondary heating system
New system type	Pelletszentralheizung	Stove
Fuel	Pellets	Biomass
Distribuition system	Radiators	Kachelofen (tile stove)
Nominal power	8,5 kW	kW

DOMESTIC HOT WATER

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.

More Details

	New DHW system
Type	with heating system
Hot_water_tank	Si
With heat recovery	No

RENEWABLE ENERGY SYSTEMS

SolarThermal

Biomass

SolarThermal

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.

View East after Renovation ©Vincent Baur??

More Details

	SolarThermal System
Type	Flat collector
Collector area	10,0 m²
Elevation angle	44,0
Azimuth	105,0
Overall yearly production	2510,0 kWh
Heating_contribuition	0,0 kWh
DHW contribuition	2510,0 kWh
Cooling contribuition	0,0 kWh

Biomass

The heating and hot water supply of the object after the renovation is provided by a pellet central heating and a tiled stove.

More Details

	Biomass System
Type	Pellet
Storage size
Origin of biomass
Overall yearly production	kWh

Energy Efficiency

Energy Performance

Energy performance certificate: Energy performance certificate
Voluntary certificates: No

Energy Use

Heating
Primary Energy 7,6 kWh/m2.y
Consumption_estimation_Before: 6,000 kWh/y
Consumption_estimation_After: 38 kWh/m2.y

Primary Energy
Consumption_estimation_Calculation_method: Steady state simulation (e.g. EPC, PHPP)
Consumption_estimation_Including_DHW: No
Consumption_estimation_After: 7,6 kWh/m2.y

Costs

Running Costs

Lifecycle cost
No