La Mola - St Andreu

New Construction

  • Building Type : Terraced Individual housing
  • Construction Year : 2020
  • Delivery year : 2020
  • Address 1 - street : 1, Calle Montardó 08740 SANT ANDREU DE LA BARCA, España
  • Climate zone : [Csb] Coastal Mediterranean - Mild with cool, dry summer.

  • Net Floor Area : 312 m2
  • Construction/refurbishment cost : 452 400 €
  • Cost/m2 : 1450 €/m2

Certifications :

  • Primary energy need :
    5 kWhpe/m2.year
    (Calculation method : RD: 47/2007 )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

The plot on which we are working is located in the municipality of Sant Andreu de la Barca (Barcelona). It is an urbanized area with plots for single-family use. The plot has 405.50 m2 with a roughly trapezoidal corner shape. It has two fronts to public roads and the other two to neighboring plots. The orientations of its different fronts are NE, SE, SW and NW.

This project, from its initial conception phase, has sought to be a benchmark and a model to follow from the point of view of energy efficiency as well as sustainability. For this reason, we have worked holistically throughout the process to obtain the maximum corresponding guarantee certificates in each of the areas.

First of all, as is customary in the ARQUIMA building system, the building has been certified with the Passivhaus certification. This time with the PREMIUM category, the most demanding in its field. At the same time, it has worked with the GREEN certification, from the Green Building Council Spain (GBCe). This certification measures the level of sustainability of a project through a scoring system that results in a number of sheets, with a maximum of 5.

See more details about this project

Data reliability

3rd part certified

Photo credit

Stefano Carlo Ascione




Construction Manager





    Eduard Balcells


    Site manager

    Jordi Collado



    Marian Rigo


    CADWORK elaboration and responsible for motaje


    Stefano Carlo Ascione



Contracting method

Lump-sum turnkey

Owner approach of sustainability

At ARQUIMA we follow a holistic work methodology where all project participants work together from the first design phase. This collaborative approach ensures that all agents contribute to the development of the best project for each case, and in this case, where there are objectives set from the early stages, this integration of specialists and agents is even more necessary.

Our industrialized system is based on construction with wood, the most sustainable construction material on the market. We manufacture buildings, facades or complete envelopes in our facilities in Barcelona, without limits for the designer, achieving exclusive and avant-garde projects that are based on a structural system of load-bearing walls and slabs, making it possible to save large spans, important overhangs and raise buildings in height .

We offer an alternative that is respectful with the environment, with people's health and energy efficient to reduce excess CO2 emissions on the planet. We use materials with the minimum carbon footprint such as wood from sustainably managed forests and certified with PEFC or FSC stamps.

Our buildings comply with the European energy efficiency standards nZEB (nearly Zero Energy Buildings - European directive 2010/31 / EU) and can obtain sustainable architecture certificates with the international entities Leed, Breeam, Passivhaus Institut, Minergie or Verde-GBCe, among other

Architectural description

The functional program is defined from the first proposals being identical in both houses, although the distributions may be different.

On the ground floor, the day area will be located in relation to the exterior space of the plot, along with 1 bathroom and a room. On the upper floor is the night area with a main room en suite and two secondary rooms with another bathroom, as well as a laundry room. The front of Montardo Street, facing NE, is where the entrances to both the plot and the interior of the houses as well as services are located, leaving the SE and SW orientations for the living room-dining room-kitchen.

The construction system of the façade is made up of an SATE system on the prefabricated walls of the ARQUIMA system. The versatility that the standard wall provides us to apply different facade systems, allows us to propose changes in the surface of the facades. In this case, work began with the possibility of implanting ventilated façade panels with a wood finish. These panels are strategically associated with the gaps in the façade to generate blocks that will gradually dislodge from each other, generating a sensation of movement opposed to the static of such a delimited volume.

Energy consumption

  • 5,00 kWhpe/m2.year
  • 50,00 kWhpe/m2.year
  • RD: 47/2007

Envelope performance

  • 0,23 W.m-2.K-1
  • The envelope is projected with the ARQUIMA system, which fulfills a structural and enclosure function at the same time. The exterior walls are configured as load-bearing walls like some interiors of the house. These are made up of uprights, sleepers and spruce wood pillars, of KVH quality, 140x60 mm section, 9 mm OSB board on both sides, 140 mm of wood fiber thermal insulation inside the frame, and battens 38x58 mm for interior chamber of installation passage.

    In the case of internal load-bearing walls, the section of the uprights is 100x50 mm, and therefore the thermal and acoustic insulation in them is 100 mm. The wooden girders and specific pillars will be made of GL24h laminated spruce wood.

    On the outside they are covered with a thermal insulation system on the outside SATE with a white lime plaster finish and combined with a ventilated façade system with a gray wood finish that is associated with the façade openings.

    The carpentry is made of pine wood with the exterior face in lacquered aluminum with triple glazing and interior chambers of argon and low-emission glass. On the south-east, south-west and northwest facades there are solar protections to improve the thermal quality of the house.

  • 2,00
  • n50

  • 0,49


    • Heat pump
    • Radiant ceiling
    • Heat pump
    • Fan coil
    • Floor cooling
    • Free-cooling
    • humidity sensitive Air Handling Unit (hygro A
    • Double flow heat exchanger
    • Solar photovoltaic
    • Heat pump
  • 100,00 %
  • The air conditioning of the houses is carried out by means of a radiant floor that will provide heat and cold through the hot or cold water generated by the aerothermal equipment.

    Underfloor cooling is only feasible when the demand for cooling is very low. Complying with the Passivhaus certification we make sure that with this system we can cover the demand for cold in the homes.
    On the other hand, the temperature of the radiant floor should be controlled very well in cold mode to avoid possible superficial condensation. The home automation equipment will control that temperature based on the indoor ambient temperature and relative humidity to avoid reaching dew point temperature.

    The objective of the project was to achieve the Passivhaus Premium certification. This meant that the building had to generate a high amount of renewable energy. To achieve this, 32 solar panels of 440 Wp have been installed. In other words, it is expected that the installation of both houses together can generate a peak power of 14.08 kWp at the time of highest production.

    Thanks to the fact that the building is located in a residential area with low-rise buildings, there is no element in the environment that can generate shadows on the plates and thus reduce energy production

Smart Building

    Interior lighting control
    All light lines in the dining room and kitchen can be controlled from Smartphone, Tablet or Web Browser. At the same time, it is allowed to create scenes that control a different number of points of light. Motion detectors are also installed to control the lights in the staircase and hallway on the first floor.

    Exterior lighting control
    It can be programmed to turn on and off depending on whether it is day or night, in addition to controlling the ignition from Smartphone, Tablet or Web Browser.

    Shading control
    Motorized blinds are programmed to orient themselves based on the position of the sun. In case of manual opening, the system will be automated again the next day. Manual opening can be controlled from the buttons or from Smartphone, Tablet or Web Browser.

    Ventilation and air conditioning control
    By means of a sensor in each plant, the system is programmed to maintain the relative humidity at maximum 60% and the CO2 at 1000 ppm. The ventilation system will increase the flow rate to ensure these values are not exceeded and, in the event of high relative humidity, the supplementary dehumidifier will activate. The air conditioning is carried out through the underfloor heating for both cold and heat. Being a system that takes time to reach working temperature due to its thermal inertia, it will always be on and will regulate demand. Thanks to the relative humidity control of the ventilation system, the flow temperature of the radiant floor water can be adjusted in cooling mode to ensure that no surface condensation is generated.

    DHW recirculation control
    A schedule is established, which the user can adjust to their needs, so that the DHW pump is in operation and thus have hot water instantly at the different consumption points.

Urban environment

The plot is located to the west of the municipality of Sant Andreu de la Barca belonging to the province of Barcelona in an area of ​​residential development of isolated single-family homes. Sant Andreu de la Barca is located in the Baix Llobregat region and is part of the Barcelona metropolitan area.

Land plot area

405,50 m2

Built-up area

40,00 %

Building Environmental Quality

  • indoor air quality and health
  • works (including waste management)
  • acoustics
  • comfort (visual, olfactive, thermal)
  • waste management (related to activity)
  • energy efficiency
  • renewable energies
  • building end of life management
  • building process
  • products and materials

Reasons for participating in the competition(s)

This project, which was assembled in two days, is the only one on the European continent to hold the highest double sustainable certification: Passivhaus Premium and 5 Green leaves from the Green Building Council. This translates into energy savings of more than 90% compared to homes built according to the Technical Building Code (CTE) of 2006, and around 50% with the update of the CTE 2019.

Building candidate in the category

Energy & Temperate Climates

Energy & Temperate Climates

Low Carbon

Low Carbon

Health & Comfort

Health & Comfort

Green Solutions Awards 2020-2021

 Passive House Premium

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