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This new residential building designed and built in Stabio has received Minergie P-ECO / SNBS certification, and a commendation at the Active House Awards 2022. It is...
Lo Scudo di Stabio
Sustainable photovoltaics

This new residential building designed and built in Stabio has received Minergie P-ECO / SNBS certification, and a commendation at the Active House Awards 2022. It is the first building in Ticino to achieve the highest Swiss standard for sustainable construction (SNBS).
The cork facade wraps around the timber framed supporting structure. The idea behind the facade is to reconstitute a technological cortex with a motif reminiscent of the digital world of vertical barcodes interspersed with crystalline silicon photovoltaic mineral modules on the south and west facades.
A small portion of the green roof is also occupied by additional photovoltaic modules, but without limiting the presence of extensive greenery that, together with the arrangement of the outdoor spaces, participates in the regeneration and enrichment of the biodiversity of the neighbouring context (flora and small fauna with particular attention to avian fauna).
The urban planning model referred to is that of the ‘smart city’, or intelligent city, with the concretisation of community housing models according to the latest ‘smart living’ and ‘co-working’ methods. In this case, a residential ‘hub’ was designed for short-term rentals: a building halfway between a multi-family residence and a hotel structure. Twenty-two fully furnished flats, ready to be inhabited even for a few weeks, and equipped with a Konnex KNX standard for home automation in the service of sustainability.
The building also promotes electric mobility with recharging stations for cars, and provides tenants with electric bicycles, which, together with new-generation storage batteries installed in the technology rooms, allow 100% self-consumption of the energy produced by the photovoltaic installation.

Architectural plan: level 0

South facade

Aerial view of the building

Building characteristics
  • Building typology
    Residential
  • Construction type
    New
  • Year of construction
    2020 – 2022
  • Energy reference surface
    1.520 m² (flats), 222 m² (offices)
  • Energy index
    60.2 kWh/m²yr (heating and electricity, ev. cooling)
  • Energy labelling
    Minergie TI-011-P-ECO / SNBS Gold. The building was also awarded the Swisstainable label of Switzerland Tourism
Energy
Active solar surface n/a n/a
Active solar surface ratio >5% >30%
Nominal power 4.5 kWp 22.4 kWp
Building skin application Flat roof Cladding
Storage Electrical battery n/a
Energy production
0
kWh
Source: production estimate
Self-consumption
80%
Building skin
  • Application
    Standard modules are laid on a metallic support system
  • Description
    The roof is covered with an extensive green roof system, a small portion of which is occupied by photovoltaic modules (south-facing with a 10° inclination), coordinated with the exterior design in order to regenerate the biodiversity of the neighbouring context.
  • U value
    n/a
  • Fastening system
    Self-supporting mounting system made of lightweight aluminium. It is installed without drilling and requires little or no overlapping load.

Installation of photovoltaic modules on a small portion of the extensive green roof.

  • Application
    PV cladding
  • Description
    The photovoltaic modules were inserted into niches carved into the cork cladding.
  • U value
    n/a
  • Fastening system
    Continuous fixing system (aluminium tracks)

Photovoltaic modules are placed in niches carved into the cork cladding.

  • Application
    Windows
  • Description
    Triple glazing with wooden frame
  • U value
    n/a
  • g value
    n/a
  • Other
    The flats are equipped with a Konnex KNX standard for home automation supporting sustainability, e.g. monitoring the status of windows so that they are not inadvertently left open.

The idea of the facade is to recreate a technological cortex with a pattern reminiscent of the digital world of barcodes interspersed with photovoltaic modules, all through the use of environmentally sustainable materials.

BIPV module
  • Product
    Facades: 39 Sunage modules full black of 305 Wp and 60 Sunage modules full black of 175 Wp
    Roof: 12 monocristalline photovoltaic modules of 370 Wp
  • Manufacturer
    Sunage SA
  • Cell technology
    Mono-crystalline
  • Front glass type/customization
    Black solar glass 3.2mm
  • Dimensions
    Facades: 985x1634mm & 1000x1050mm
    Roof: 950x1065mm
  • Nominal power
    Facades: 305 Wp & 175 Wp
    Roof: 370 Wp
  • Weight
    16 kg (facades), 19 kg (roof)
Technical details

The building is designed according to timber prefabrication logic with a predominantly frame structure, with the exception of the intermediate floor slab, which is made of XLAM (cross-laminated timber).
Crystalline silicon photovoltaic modules were embedded in the south and west facades, integrating them into the exposed cork cladding through a continuous fastening system consisting of aluminium rails.
The volumetric compactness of the new building was a prerequisite for ensuring the highest energy standard.

Vertical section
Roof/wall connection

Source: Studio di Progettazione Martinelli e Rossi Sagl.

Vertical section
Windows

Source: Studio di Progettazione Martinelli e Rossi Sagl.

Costs
  • Total cost of the building
    7.000.000 CHF
  • Price per m³  
    n/a

Larger flats living area

Parties involved
  • Owner
    Stabio Life SA
  • Architect
    Studio di Progettazione Martinelli e Rossi Sagl
  • Research partner
    SUPSI PVLab
  • Photovoltaic Installer
    Alsolis SA
  • Photo
    Marco Introini
Awards and recognitions
  • Awards
    Active House 2022 – Mention
  • Publications
    archi 2022 / 3  “A Stabio il primo SNBS ticinese”

    Fassaden 1 / 2022 “Smart living”

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