Multistorey Buildings

Karantanika Apartments

Domžale, Slovenia

View from the south 1 | View from the south
The first multistorey residential building in Slovenia that was exclusively built with wood, including structural system and the building core.
Design: The building is the result of an invited competition launched by the municipality. It consists of two three-storey building segments, joined and made accessible through a communicative, integrated hallway, and a penthouse level on top. The 20 housing units feature modern open floor plans and generous windows.

Wood: The building ist the first residential building entirely made of wood and the first four-storey wood building in Slovenia. With the exception of the underground level, no concrete or reinforced concrete has been used anywhere in the building. The structural system of the building, including the staircase and elevator core, and all non-loadbearing elements consist of cross-laminated timber. The timber was processed within 10 kilometers. The investor agreed to building with wood only shortly before the building application was submitted. One of the advantages of building with wood displayed here is the saving of time, as the timber construction was produced and erected in only one month.

Energy: The thermally insualting properties of cross-laminated timber and the use of individual ventilation units with heat recovery helped the building reach a very low energy demand.
View from the east 2 | View from the east
Living room 3 | Living room
Terrace view 4 | Terrace view
Basic information
Year of Completion |  2018
Investor |  ALFA INT d.o.o., Domžale (SI)
Architecture |  TRIA STUDIO d.o.o., Mengeš (SI)
Structural Engineering |  CBD d.o.o., Celje (SI)
Construction Time |  11 months (wood construction 1 month)
Number of floors |  4 + underground parking
Plot size |  2 365 m²
Gross floor area |  3 058 m²

Technical aspects
Concept |  Timber frame construction from ground up without using concrete or reinforced concrete
Woodworking |  Alfa Natura d.o.o., Mengeš (SI)
Origin of Timber, Certification |  PEFC-certified wood from within 400 kilometers; ISO 14001- and EPD certificates
Traceability of Timber |  Guaranteed through PEFC
Forestry Value Chain |  Almost exclusively companies from within 10 kilometers
Energy Efficiency Standard |  Low-energy building
Energy Systems |  Ventilation with heat recovery, bio mass-based central heating
Energy Consumption  |  23.23 kWh/m²a
U-Value Wall | Roof | Floor | Windows (W/(m²K)) |  0.149 | 0.083 | 0.193 | 0.091

Cost Saving Energy Efficiency

Floor Plan (Ground floor) Floor Plan (Ground floor) Cross Section Cross Section

Civil Engineering Works

  • 09Hyère River Road Bridge
  • 17Stuttgart Wood Bridge
  • 27Avisio River Footbridge
  • 44Forest Observation House
  • 52Elephant House Zoo Zurich

Multistorey Buildings

  • 02HoHo Wien
  • 10Building Cooperative Habrico
  • 28Social Housing Via Cenni
  • 45Karantanika Apartments

Residential Buildings

  • 03Stürcherwald House 
  • 11Chalet Chantemerle
  • 29Jesolo Lido Pool Villa
  • 46Scandinavian House

Commercial Use

  • 04Ski Hut Wolf
  • 12Sheep Stable
  • 30Oberholz Mountain Hut
  • 47Youth Hostel Punkl

Office Buildings

  • 01Illwerke Zentrum Montafon
  • 05Wälder Insurance
  • 13Administrative Offices
  • 31LignoAlp Office Building

Refurbishment and Restoration

  • 06Working quarters Josef Weiss
  • 22Freiburger Hof
  • 32Passeggiata dei Castani
  • 49Upgrading of Hotel Terme
  • 50Alpine Barn Apartment

Public Buildings

  • 07Civic Center
  • 08Fire Station Thal
  • 15Passive House School
  • 33Community Center Caltron
  • 51EXPANO Pavilion
  • 57Théâtre Vidy Pavilion

Special Projects

  • 06aLoft in the Barn
  • 34Sasso Nero Mountain Hut
  • 35Veidlerhof
  • 36Tree of Life
  • 48Wooden Interventions