Can Mati – Viladecans (Spain)
- 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
Primary energy need
(Calculation method : Other )
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 projecthttps://passivehouse-database.org/index.php?lang=en#d_7136
3rd part certified
Thermal consultancy agency
Praxis Resilient Buildings
Consulting & Passivhaus design; blower door essay
Daniel Tigges - Tigges Architekthttps://www.tiggesarchitekt.ch/
Architect, project editor & project manager
Josep Maria Fosalba i Julià - Oftecnics
Technical Architect / Director of Work Execution
Bernuz Fernandez SLP
Energiehaus Arquitectos SLP
Passivhaus certification company
Manufacturer of the mechanical ventilation system with Passivhaus heat recovery
Maderas Casas S.A
Window manufacturing company
Diaz Fusters S.L.
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.
- 76,00 kWhpe/m2.year
- 250,00 kWhpe/m2.year
- 38,00 kWhfe/m2.year
- 0,41 W.m-2.K-1
Real final energy consumption
- Heat pump
- Heat pump
- Reversible heat pump
- Fan coil
- Natural ventilation
- Double flow heat exchanger
- Solar Thermal
- Heat pump
- 50,00 %
- 20,00 KgCO2/m2/year
- 100,00 year(s)
Zehnder ComfoAir 450 ERV
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.