Deep renovation in existing residential buildings through façade additions: A case study in a typical residential building of the 70s

Fotopoulou, Anastasia; Semprini, Giovanni; Cattani, Elena; Schihin, Yves; Weyer, Julian; Gulli, Riccardo; Ferrante, Annarita

doi:10.1016/j.enbuild.2018.01.056

Cited by 81 publications

(47 citation statements)

References 8 publications

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“…If the building materials and structural elements are nearing the end of their service life and the energy performance of the building needs to be improved, the owner of the building has to take measures required to ensure that the relevant criteria are met. As in Europe, more than 70% of the residential buildings are over 30 years old and about 35% are more than 50 years old, complete technical improvement of their condition has been receiving increasing attention [1,2]. Energy performance of building directive (EPBD) [3] requires all new buildings to be nearly Zero Energy Buildings (nZEB) as of the year 2020 and to renovate almost all buildings by the year 2050.…”

Section: Introductionmentioning

confidence: 99%

Development and Performance Assessment of Prefabricated Insulation Elements for Deep Energy Renovation of Apartment Buildings

2020

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A need for the refurbishment and renewal of the existing building stock has been in focus for many decades, principally because of excessive global energy consumption and pollution. This paper presents a methodology and the results of analysis of choices of realizable sets of timber frame prefabricated insulation elements for major renovation of apartment buildings. Numerous combinations of elements with different characteristics were analyzed by applying measurements, interviews, and building performance simulation software, and thereupon their performance, installation eligibility, and concurrent cost levels were compared. Mineral wool board with a special wind barrier facing was found to be the best material as a wind barrier from the perspective of hygrothermal performance. An air and vapor barrier should have sufficient vapor permeability to allow dry-out of constructional moisture. It is possible to renovate apartment buildings to meet the nZEB energy performance requirements and their moisture safety can be guaranteed without paying high relative difference cost. Calculations showed that the global cost was lower for solutions with some mold growth risk. Great care is needed when decreasing costs without simultaneous hygrothermal analyses. The facade cladding was found to have the highest influence on the initial cost of the prefabricated insulation element.

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Section: Introductionmentioning

confidence: 99%

Development and Performance Assessment of Prefabricated Insulation Elements for Deep Energy Renovation of Apartment Buildings

2020

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“…Buildings such as the studied reference case are often in need of more or less extensive renovation, due to age and wear. Renovation of the building envelope (walls, roof and windows) can be combined with measures to improve the indoor climate and the thermal comfort and reduce the heating demand and operating costs, as shown in many previous studies [9,[33][34][35][36]. However, it has been argued that for buildings with DH, it is better to focus on reducing the electricity demand than the heating demand, since many DH systems are based on CHP, and the market for heat is more constrained than the market for electricity [37][38][39].…”

Section: Discussionmentioning

confidence: 99%

Life Cycle Cost of Building Energy Renovation Measures, Considering Future Energy Production Scenarios

et al. 2019

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A common way of calculating the life cycle cost (LCC) of building renovation measures is to approach it from the building side, where the energy system is considered by calculating the savings in the form of less bought energy. In this study a wider perspective is introduced. The LCC for three different energy renovation measures, mechanical ventilation with heat recovery and two different heat pump systems, are compared to a reference case, a building connected to the district heating system. The energy system supplying the building is assumed to be 100% renewable, where eight different future scenarios are considered. The LCC is calculated as the total cost for the renovation measures and the energy systems. All renovation measures result in a lower district heating demand, at the expense of an increased electricity demand. All renovation measures also result in an increased LCC, compared to the reference building. When aiming for a transformation towards a 100% renewable system in the future, this study shows the importance of having a system perspective, and also taking possible future production scenarios into consideration when evaluating building renovation measures that are carried out today, but will last for several years, in which the energy production system, hopefully, will change.

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“…Yet, the purpose of many reviews on technical challenges is to assess what is feasible or technically suitable in specific cases [13]. Several works in the recent literature have focused on the investigation of technological solutions for deep renovation [20,21]. In particular, the focus is usually on integrated packages aimed at improving performance while reducing the time and complexity of the interventions, combining a set of renovation measures for the envelope and the HVAC system [22].…”

Section: Review Of Technical Challengesmentioning

confidence: 99%

“…In particular, several studies [17,21,36] have pointed out that there is an embedded cost of failures during the construction on a traditional building site; this has been estimated an impact of around 20% of the global construction cost. The cost of failures is related to human error (54% of failures), material defects (12%), and errors during construction (34%).…”

Section: Technical Aspectsmentioning

confidence: 99%

Technical, Financial, and Social Barriers and Challenges in Deep Building Renovation: Integration of Lessons Learned from the H2020 Cluster Projects

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et al. 2018

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With a low rate of new building construction and an insufficient rate of existing building renovation, there is the need to step up the pace of building renovation with ambitious performance targets to achieve European Union (EU) climate change policies for 2050. However, innovative technologies, including, but not limiting to, plug and play (PnP) prefabricated facades, information and communications technology (ICT)-support for building management systems (BMS), the integration of renewable energy systems (RES), building information model (BIM) and building performance simulation models (BPSM), advanced heating, ventilation, and air conditioning (HVAC), advanced geomatics, 3D-printing, and smart connectors, cannot alone solve the problem of low renovation rates of existing buildings in Europe that is hindering reaching of EU-wide targets. A workshop was held at the Sustainable Place Conference 2018 to present, with an integrative approach, the experiences from four H2020 innovation actions, i.e., 4RinEU, P2ENDURE, Pro-GET-OnE, and MORE-CONNECT, which were united by their central aims of improving building energy performance through deep renovation practices. This article presents the outcomes of the joint workshop and interactive discussion, by focusing on technical, financial, and social added values, barriers and challenges, in the context of the building renovation processes tackled by the four projects. Conclusive remarks converge on the identification of open questions to address future innovation opportunities, as well as some recommendations to be used at a policy level and/or in future implementation projects.

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Deep renovation in existing residential buildings through façade additions: A case study in a typical residential building of the 70s

Cited by 81 publications

References 8 publications

Development and Performance Assessment of Prefabricated Insulation Elements for Deep Energy Renovation of Apartment Buildings

Development and Performance Assessment of Prefabricated Insulation Elements for Deep Energy Renovation of Apartment Buildings

Life Cycle Cost of Building Energy Renovation Measures, Considering Future Energy Production Scenarios

Technical, Financial, and Social Barriers and Challenges in Deep Building Renovation: Integration of Lessons Learned from the H2020 Cluster Projects

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