Can Mati – Viladecans (Spain)

Last modified by the author on 22/02/2023 - 18:59

Renovation

  • Building Type : Isolated or semi-detached house
  • Construction Year : 2021
  • Delivery year : 2021
  • Address 1 - street : C/ de Pi i Margall, 27 08840 VILADECANS, España
  • Climate zone : [Csb] Coastal Mediterranean - Mild with cool, dry summer.

  • Net Floor Area : 208 m2
  • Number of Dwelling : 1 Dwelling

Certifications :

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

Can Mati, a historic farmhouse of peasant origin, in Viladecans, becomes the first Passivhaus-certified home in the city. The project allowed to maintain the existing structure and aspect of the building, while creating bright and generous spaces. It renews the envelope energetically, with efficient facilities, and a self-consumption photovoltaic installation. The house is now Passivhaus EnerPHit Classic certified.

The tightness reached a good value of n50=0.5 ren/h, which meets the Passivhaus criteria for new construction. Simple solutions have been applied, such as plastering and waterproofing of the roof. Sealing membranes have only been used occasionally.

External insulation has been applied where possible. For conservation purpose, the upper part of the main facade has been insulated with crushed cork insulation and Diathonite lime mortar from Diasen. The patio facade was insulated with rockwool SATE with Com Cal mortar. The horizontal elements were insulated with wood fiber, with the exception of a second layer of XPS insulation on the roof membrane to protect the construction from condensations. As a whole, the intervention reduces heating demand by 90% compared to the initial state.

See more details about this project

 https://passivehouse-database.org/index.php?lang=en#d_7136
 https://www.plataforma-pep.org/ejemplos-ph/can-mati/

Data reliability

3rd part certified

Photo credit

Pol Viladoms

Contractor

    Construgiba SL

Stakeholders

    Thermal consultancy agency

    Praxis Resilient Buildings

    praxis[a]praxis-rb.com

     https://praxis-rb.com/

    Consulting & Passivhaus design; blower door essay



    Others

    Josep Maria Fosalba i Julià - Oftecnics

    Technical Architect / Director of Work Execution


    Others

    Instal.lacions R.B.G

    Installer company


    Developer


    Structures calculist

    Bernuz Fernandez SLP

    Structural calculation


    Certification company

    Energiehaus Arquitectos SLP

    Passivhaus certification company


    Manufacturer

    Zehnder

     https://www.zehnder.es/

    Manufacturer of the mechanical ventilation system with Passivhaus heat recovery


    Manufacturer

    Maderas Casas S.A

    Window manufacturing company


    Manufacturer

    Diaz Fusters S.L.

    Interior carpentry

Contracting method

Separate batches

Owner approach of sustainability

The objective of the promoters was to adapt an urban farmhouse in the historic center of Viladecans to the 21st century. Carefully rehabilitated, maintaining the existing substantial structure and wrapped with excellent thermal insulation, this building received the German Passivhaus EnerPHit certification. In addition to energy efficiency, the project considers indoor air quality, as well as the environmental impact of construction materials.

Building users opinion

High level of comfort both in winter and summer, with excellent indoor air quality, and very low energy bills.

Energy consumption

  • 76,00 kWhpe/m2.year
  • 250,00 kWhpe/m2.year
  • Other

  • 38,00 kWhfe/m2.year
  • Final energy consumption for all consumptions, calculated with PHPP v.9 of the Passivhaus Institut, is 38 kWh/m2·a.

    Actual consumption measured during the year 2022 is 29 kWh/m2·a.

Envelope performance

  • 0,41 W.m-2.K-1
  • Exterior wall:
    - 10mm lime mortar
    - Rockwool RockSATE DUO Plus 120mm insulation
    - Existing mortar 20mm
    - Existing masonry wall 355mm
    - Plaster plaster 15mm
    U = 0.270 W/m2 K

    Deck:
    - Gravels 50mm
    - 100mm XPS insulation
    - EPDM
    - Pavtherm 100mm wood fiber insulation
    - Existing ceramic vaults 90mm
    - Plaster plaster 15mm
    U = 0.190 W/m2 K

    Solera:
    - 20mm soft ceramic flooring
    - 10mm adhesive mortar
    - 50mm mortar
    - Rocksol E525 80mm stone wool insulation
    - Hermetic and breathable sheet
    - Gravels 100mm
    U = 0.426 W/m2 K

    Windows:
    - Esperia 89 - Sirio Alumino
    - Triple glass: 44XN/18ARWE/4/18ARWE/4XN
    - Skylight: Velux DOME
    Uw = 0.88 W/m2 K

    n50

  • 0,50

Real final energy consumption

    29,00 kWhfe/m2.year

    2 022

Systems

    • Heat pump
    • Heat pump
    • Reversible heat pump
    • Fan coil
    • Natural ventilation
    • Double flow heat exchanger
    • Solar Thermal
    • Heat pump
  • 50,00 %
  • Bomba de Calor Mitsubishi PUHZ-SW120VHA con Fancoil Mitsubishi i-LIFE2 HP 1002 y 1202
    Zehnder ComfoAir 450 ERV

    4.44 kWp photovoltaic generator; Zehnder ComfoAir 450 ERV heat recovery ventilation unit with Passivhaus component certification

    Great openings to the south

GHG emissions

  • 20,00 KgCO2/m2/year
  • PHPP & Missed

  • 100,00 year(s)

Product

    Zehnder ComfoAir 450 ERV

    Zehnder

     https://www.zehnder.es/

    Climatización / Ventilación, refrigeración

Reasons for participating in the competition(s)

The main challenge we face in the built environment is - precisely - the rehabilitation of the existing housing stock, to create healthy, comfortable homes with low energy consumption. The project shows a small example of what is possible within the scope of comprehensive energy rehabilitation, achieving a 90% reduction in heating demand compared to the initial state.

One of the strengths of the project was airtightness, where an excellent result of n50= 0.5 ren/h was achieved in the Blower Door test, meeting the Passivhaus criteria for new construction. Simple solutions have been applied and sealing membranes have only been used occasionally.

Building candidate in the category

Users’ Choice

Users’ Choice

Green Solutions Awards 2022-2023 / España
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 Green Solutions Awards Green Solutions Awards 2022 2023

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