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3Dutch existing building stock has, according to Dutch governmental policy derived from the European goals, to be renovated towards NetZero in about 2050. However, this goal will not be reached without new digitalized tools, like BIM, 3D scanning and printing, automation and robotization of production processes. To make automation and robotization possible, standardization must be developed through the design, production and maintenance process. But there is already a standardization present in the current building stock, that can be put to use. For the professionals throughout building industry this means that new proficiency and new knowledge has to be achieved. 21st century skills have to be developed, but only after the 21st century skills for professionals have been researched and defined. This paper aims at explaining the interconnection between ICT innovation, recognizing patterns in the building stock and development of personal skills and proficiency for automation in Dutch NetZero building renovation.
CONFERENTIEBIJDRAGE
Dwellings and systems are becoming ever more complex. In achieving high energy performances, the interaction among user, building and systems plays an increasingly crucial role. We studied this interaction in 16 recently renovated low-energy dwellings, to advance the field in terms of methods, and to derive pointers for improved renovation concepts. We used sensors to monitor the indoor environment. And we further developed a method that uses questionnaires, diaries and a so-called andapos;walk through the houseandapos; interview technique to gain insights into occupant behaviour and the reasons for the occupants’ behaviours. The results show that the observed behaviour was almost always a normal response to the situation, but often not the behaviour that was expected when designing the renovation concept. A major reason for this was the occupants’ efforts to reduce discomfort, which was often the result of the renovation solution itself (for example draught, noise or a warm bedroom). So, we found that behaviour was often a quite normal reaction to the renovation solution. We conclude that the resulting underperformances of renovation concepts are caused by technology centred design. We posit that this can be improved by testing renovation concepts in real world situations
CONFERENTIEBIJDRAGE
There is an urgent need for energy renovation of the existing building stock, in order to reach the climate goals, set in Paris in 2016. To reach climate targets, it is important to considerably lower energy demand as well as switch to fossil-free heating systems. Unfortunately, renovation rates across the EU remain at a low level of 1% per year. Deep renovation, which lowers energy use with 60% or more, accounts only for 0,2% of renovations. The heating transition thus progresses much more slowly than the electricity transition. We draw on the framework of technological innovation systems, which allows comparison of different transitions. In the literature, it is argued that the configurational nature of the renovation system is one of the main reasons for the slow heating transition. The renovation system is context-bound and consists of many actors both on the demand-side and the supply-side, which leads to a fragmented market. For increasing the speed of the heating transition, it is deemed important to counter this fragmentation. We carried out a review of reports and publications of EU-funded projects on energy renovation. In many projects fragmentation in the building sector was identified as one of the main obstacles. We analyzed the deliverables of these energy renovation projects to find tried and tested solutions. One of these is the so-called one-stop-shop, which promises to improve the organization of the supply side, while also providing an appropriate and affordable solution to the customer. In the discussion we argue that the energy renovation system could be improved by increasing collaboration on the supply side and at the same time simplifying the renovation process for customers. A promising tool to make this happen is the one-stop-shop.
ARTIKEL
One of the most complex and urgent challenges in the energy transition is the large‐scale refurbishment of the existing housing stock in the built environment. In order to comply with the goals of the Paris convention, the aim is to live “energy‐neutral,’’ that is, a dwelling should produce as much sustainable energy as it consumes on a yearly basis. This means that millions of existing houses need to undergo a radical energy retrofit. In the next 30 years, all dwellings should be upgraded to nearly zero‐energy buildings, which is a challenge to accomplish for a reasonable price. Across the EU, many projects have developed successful approaches to the improvement of building technologies and processes, as well a better involvement of citizens. It is important to compare and contrast such approaches and disseminate lessons learned.
In practice, it is crucial to raise the level of participation of inhabitants in neighborhood renovation activities. Therefore,
the central question of this issue is: How can we increase the involvement of tenants and homeowners into this radical
energy renovation?
SPECIALE UITGAVE
The Netherlands is undergoing a massive (re)construction challenge. In addition to building new housing, a substantial part of the existing building stock of housing corporations is undergoing renovation.
This renovation challenge has varying interactions with the energy transition, testified by the Dutch government’s ambitious target of connecting 200,000 buildings to fossil-free energy infrastructure (Rijksoverheid 2019). Improving the building quality, including the energy efficiency, of buildings, might reduce the overall energy consumption of households. Yet, a closer look at the interactions between renovation and energy are more instructive, as renovation is coupled with decisions regarding the energyuse and specifically heat-use of buildings. Renovation processes are a natural moment to take decisions regarding low-carbon heating: will houses and other buildings be renovated with an eye to district heating, or to supply their energy needs through electricity alone (or another solution altogether)?
Such strategic decisions require coordination between decision-making processes at the level of building owners (such as households or housing corporations), municipalities, as well as energy infrastructure operators (such as heat companies or grid operators), all of which operate at different time scales.
The importance of coordination becomes all the more salient given ambitious targets around renovation and energy transition set by the Government’s climate accords. In fact, according to the construction industry, such ambitions can only be reached through the implementation of new strategies for clustering
and coordinating projects. A failure to coordinate might lead to failed business cases for district heating if renovation plans are more aligned with all-electric options, unnecessary costs for electricity grid reinforcement (if DH-connection would have reduced electricity consumption peaks) or grid congestion
issues (if grid operators are unable to timely make the necessary investments in grid reinforcement), and incapacitate housing corporations from timely making the right decisions. A failure to coordinate renovation and energy transition successfully, in other words, will lead to an inefficient allocation of limited (human) resources, delays, and a potential cascade of other negative socio-economic and political consequences considering the salience of housing and energy costs as pivotal issues in the Dutch political landscape.
The NWO-KIC funded PreMadona project aims to develop and interrogate a new digital ecosystem to enable renovation flow and clustering approaches proposed by the construction sector. These digital innovations are envisaged to help undertake this urban renovation and infrastructural challenge more efficiently,
speedily, and intelligently, and are promoted by the building industry (Rovers and Tigchelaar 2024). PreMadona seeks to develop the required digital innovation, including by tackling sociotechnical challenges of data, trade-offs between context-awareness and collective optimisation, operational coordination,
and the misalignment of technology and practice. Rather than developing technology alone, PreMadona simultaneously co-develops the digital innovation as well as the governance frameworks required for its proper implementation, in order to engender a properly embedded sociotechnical innovation.
ABSTRACT
The construction sector is responsible for a significant share of greenhouse gas emissions in Europe, making the decarbonisation of the existing building stock a critical priority. In this context, Digital Building Logbooks (DBLs) are increasingly promoted as digital tools to support renovation planning, data continuity, and circular economy practices across the building lifecycle. Despite growing policy attention, the adoption of DBLs in renovation projects remains limited in practice. This study provides one of the first empirical rankings of perceived barriers, benefits, and drivers influencing DBL adoption in renovation projects across Europe. An exploratory quantitative survey was conducted with a purposively selected sample of stakeholders involved in renovation-related activities. Likert-scale responses were analysed using descriptive ranking statistics and reliability testing, while qualitative data from open-ended responses were analysed using directed content analysis. The results indicate that stakeholders strongly recognise the benefits of DBLs, particularly in terms of improved access to reliable building information, informed decision-making, and support for circular renovation practices. However, adoption is constrained by regulatory uncertainty, limited awareness, and unclear governance and operational frameworks. The most influential drivers identified relate to interoperability with existing digital tools, rising awareness of DBLs among stakeholders, regulatory support, and the availability of standardised and operationally clear frameworks for DBL implementation.
ARTIKEL
There is an urgent need for energy renovation of the existing building stock to reach the climate goals, set in Paris in 2016. Unfortunately, energy renovation rates across the EU remain at a low level of 1% per year. Moreover, the depth of the achieved energy renovation is in most cases rather shallow. Deep renovation, referring to renovation which lowers energy use with 60% or more, accounts for only 0,2% of total refurbishments. This means that both the pace and the quality of energy renovation needs to increase to achieve climate goals in 2050. In this article we identify lessons-learned from policies for energy renovation, in particular policies regarding the Energiewende in Germany. With an effective approach, combining remuneration and information, a revolutionary increase in RES-installations was brought about.
ABSTRACT
One of the most complex and urgent challenges in the energy transition is the large-scale refurbishment of the existing housing stock in the built environment. In order to comply with the goals of the Paris convention, the aim is to live “energy-neutral,” that is, a dwelling should produce as much sustainable energy as it consumes on a yearly basis. This means that millions of existing houses need to undergo a radical energy retrofit. In the next 30 years, all dwellings should be upgraded to nearly zero-energy buildings, which is a challenge to accomplish for a reasonable price. Across the EU, many projects have developed successful approaches to the improvement of building technologies and processes, as well a better involvement of citizens. It is important to compare and contrast such approaches and disseminate lessons learned. In practice, it is crucial to raise the level of participation of inhabitants in neighborhood renovation activities. Therefore, the central question of this issue is: How can we increase the involvement of tenants and homeowners into this radical energy renovation?
REDACTIONEEL
In 2015 and 2016, Saxion University of Applied Sciences organized the 2nd and 3rd edition of the Regional Innovation and Entrepreneurship Conference (RIEC).The Building challenge is a new education model in which students work in mixed international teams on a real assignment, in order to use the different approaches of architecture and construction in different cultures to come up with new creative ideas for renovation of the built environment.
CONFERENTIEPAPER
This paper presents work aimed at improved organization and performance of production in housing renovation projects. The purpose is to explore and demonstrate the potential of lean work organization and industrialized product technology to improve workflow and productive time. The research included selected case studies that have been found to implement lean work organization and industrialized product technology in an experimental setting. Adjustments to the work organization and construction technology have been implemented on site. The effects of the adjustments have been measured and were reviewed with operatives and managers. The data have been collected and analyzed, in comparison to traditional settings. Two projects were studied. The first case implied am application of lean work organization in which labor was reorganized redistributing and balancing operations among operatives of different trades. In the second case industrialized solution for prefabricated installation of prefabricated roofs. In both cases the labor productivity increased substantially compared to traditional situations. Although the limited number of cases, both situations appeared to be representative for other housing projects. This has led to conclusions extrapolated from both cases applicable to other projects, and contribution to the knowledge to improve production in construction. Vrijhoef, R. (2016). “Effects of Lean Work Organization and Industrialization on Workflow and Productive Time in Housing Renovation Projects.” In: Proc. 24 th Ann. Conf. of the Int’l. Group for Lean Construction, Boston, MA, USA, sect.2 pp. 63–72. Available at: .
CONFERENTIEBIJDRAGE
