Straw low-energy single-family house

Written by Herbert Gruber

With an EKZ of 15, this building meets the passive house standard.

Key data

Province:StyriaCity:SchäffernCompletion:2011Type of Construction:infill constructionDesign/ArchitectureMartin BrandstätterCarpenter:Holzbau WinklerBuilding Costs:1400,- €/m2Possibility to visit:YesPress photos:No
Heating demand:15U-Value (Wall):W/m2KU-Value (Roof):W/m2KHeating/Ventilation System:PV-Anlage auf dem Balkon (nicht im Bild zu sehen)Categories:Projects Austria,
More about this Straw Bale House

This straw bale building in Schäffern, Styria, has a usable living space of 155 m2, plus a further 10 m2 of external superstructure. With an EKZ of 15, it would be considered a passive house everywhere except in Austria.
Owner: Josef and Christine Prenner, Pictures: partly by (c) Martin Brandstätter

Further info: www.strohpassivhaus.at

Wall construction:

  • Loam rendering, clay fleece technique
  • Wall cladding
  • Wooden waler with 60cm straw insulation
  • Wooden boarding
  • Wind brake
  • Rear ventilated larch façade

Roof construction:
Same as the walls, but instead of façade Ethernit Tuscany roofing

Floor slab:
Concrete, timber beams 22 cm with cellulose insulation, vapour barrier, formwork, installation level 6 cm with cellulose insulation, formwork, larch ship floor

Own work:
Basement, woodwork helped, straw brought in, earthwork helped, partition walls, installations largely

Dieser Strohballenbau im steirischen Schäffern weist eine Wohnnutzfläche von 155 m2 auf, dazu kommen weitere 10 m2 an außen überbautem Raum. Mit einer EKZ von 15 würde es überall außer in Österreich als Passivhaus gewertet werden.
Eigner: Josef und Christine Prenner, Bilder: zum Teil von (c) Martin Brandstätter

Weitere Infos: www.strohpassivhaus.at

Wandaufbau:

  • Lehmputz, Lehmvliestechnik
  • Verschalung
  • Holzriegel mit 60cm Strohdämmung
  • Holzschalung
  • Windbremse
  • hinterlüftete Lärchenfassade

Dachaufbau:
Gleich der Wände, nur anstatt Fassade Ethernit Toskana-Deckung

Bodenplatte:
Beton, Holzriegel 22 cm mit Zellulosedämmung, Dampfbremse, Schalung, Installationsebene 6 cm mit Zellulosedämmung, Schalung, Lärchenschiffboden

Eigenleistungen:
Keller, Holzbau mitgeholfen, Stroheinbringung, Lehmbau mitgeholfen, Zwischenwände, Installationen großteils

About the author

Herbert Gruber

Herbert is author of the book "Neues Bauen mit Stroh in Europa" (New Building with Straw in Europe), head of the austrian strawbale network ASBN and partner in the Leonardo-project "STEP" (Strawbale Training for European Professionals) and the Erasmus project "BuildStraw Pro" (a project to get formal national recognition of the training) and "Make your City Smart". As a collector he documents European straw bale buildings since 1999 on his website (database, german), in lectures, workshops and books.