The green transition is a key priority in urban planning, the built environment, and heritage development, as the construction sector accounts for 35-40% of global carbon emissions. Adaptive reuse of cultural heritage plays a vital role in environmental policies by reducing the need for new construction and leveraging the embedded carbon within existing structures and materials. Integrating environmental sustainability with heritage transformation in a creative way can enhance the quality and impact of multifaceted projects.
Adaptive reuse is increasingly seen as a key strategy in mitigating urban climate change impacts. In Belgium, adaptive reuse of heritage buildings is increasingly aligned with sustainable urban development goals, which include mitigating the effects of urban heat islands, extreme weather, and biodiversity loss. These initiatives are often integrated into broader urban planning strategies that aim to enhance the environmental resilience of cities. For example, projects that involve adaptive reuse often incorporate green roofing, permeable pavements, and enhanced green spaces to reduce heat island effects and improve stormwater management (Emerald Insight) (MDPI).
Projects like the incorporation of green roofs and sustainable materials in the redevelopment of the Royal Greenhouses of Laeken illustrate how adaptive reuse can contribute to environmental sustainability. We will also include BYRRH, now BE-HERE as a good practice in this field. Le Byrrh Brussels, the 95 year-old building (1923) started as an industrial site owned and managed by a private alcoholic drink producer store, and was used for commercial functions (administration, storage, shop) until the 1960s. The building was listed as a historical monument in 1997. The City of Brussels bought the building in 2007, started actively renovating it in 2014/15, and recently finished over 12,900 sq. m of the complex for new businesses (“The Business Hub” or “The Hub”). Additionally, a cafeteria caters to both those working at the Hub and to the general public. The Business Hub will host new companies in flexible, semi-industrial units measuring between 250 sq m and 1,500 sq m with basic office fittings, as well as providing common areas and equipment. The businesses, mainly start-ups, are active in the areas of new technologies, circular economy (repair or recycling), and eco-construction. A key focus is also on sustainable food (production and supply) and catering activities. To date, BE_HERE has received 19 million euros of public financing.
The Belgian framework for the adaptive reuse of heritage sites emphasises reducing environmental impacts through energy efficiency and sustainable building practices. This approach is supported by policies that encourage the use of passive construction techniques, recovery and reuse of water and energy, and the utilisation of local materials to minimise carbon footprints. Such policies are crucial in redefining how heritage buildings are preserved and utilised, ensuring that these structures contribute positively to environmental sustainability goals. Green transition policies significantly influence the functional programming and repurposing of heritage sites in Belgium. By mandating that adaptive reuse projects incorporate sustainable practices, these policies ensure that the renovated buildings meet current environmental standards, which often involves integrating energy-efficient systems and materials that reduce the overall environmental impact of the buildings (Emerald Insight) (Circular Cities and Regions Initiative). (Circular Cities and Regions Initiative) (MDPI).
Bulgaria has policies and practices aimed at reducing the effects of climate change at the urban scale. These policies address issues such as the mitigation of urban heat islands, extreme weather events, flooding, and biodiversity loss. Integrating these practices with heritage adaptive reuse can create a more sustainable approach to urban development and cultural preservation.
Some of the main documents that regulate the field are the National Strategy for Adaptation to Climate Change and Action Plan until 2030, National Program for Improving Air Quality (2018 – 2024), National Program for Air Pollution Control (2020 – 2030), National Waste Management Plan (2021-2028) and Integrated National Energy and Climate Plan of the Republic of Bulgaria (2021 – 2030) and most of those documents are guideline for more detailed plans and programs which are elaborated on local level. The connection with heritage sites is not strictly pointed, however all climate and ecological measures are to be implemented no matter the object.
Policies and practices aimed at reducing the effects of climate change on an urban scale can be integrated into heritage adaptive reuse initiatives. By incorporating climate mitigation and resilience measures into adaptive reuse projects, heritage sites can contribute to efforts to address urban heat islands, extreme weather events, flooding, biodiversity loss, and other climate-related challenges. Some policies and practices that could be integrated at the level of heritage adaptive reuse include:
The Federal Foundation of Baukultur presents a report on the culture of construction in Germany. It contains specific recommendations for action for politics and policymakers and everyone involved in planning, design, and construction. Based on the Baukultur Report Germany (Baukultur of Conversion 2022/23), it addresses a topic whose projection in the future requires an active paradigm shift now. The demand to retain existing buildings wherever possible and to adapt them to changing needs through conversion can also be seen as an answer to climate change. It is necessary to recognize the social and cultural importance of the existing building stock and consider its emotional importance.
The significance of construction for the climate is substantially responsible for climate change, it causes almost half of the energy-related CP2 emission worldwide (UNEP). Accordingly, at the end of 2019, the EU has passed the “European Green Deal”, to achieve climate neutrality by 2050. Apart from creative initiatives such as the “New European Bauhaus”, guidelines such as the “Renovation Wave” action plan for non-refurbished buildings and the EU taxonomy, which defines sustainable investments, generate a sense of urgency for the German construction and property industry to act.
Italy, supported by European funding, is tackling the challenge of ecological transition by offering various financial instruments at both national and local levels. These incentives aim to encourage enterprises, regional entities, and research organisations to invest in green and digital transitions to enhance the country’s competitiveness.
Some of the national funding plans and projects of particular interest in this field include:
– PNRR (National Recovery and Resilience Plan) – With its Mission 2 – Green Transition. The plan aims to enhance the sustainability and resilience of the economic system, ensuring a fair and inclusive transition. It targets central administrations, regions, local entities, and research organisations. Notably, it includes resources for strengthening smart grids, aimed at public electricity distribution service concessionaires, and the Agrisolar Park call for the installation of photovoltaic panels, targeted at agricultural companies.
– Green New Deal – New funds for the Ministry of Economic Development’s investment program to carry out industrial research, experimental development, and innovation projects within the intervention areas of the so-called “Italian Green New Deal,” focusing on sustainability and the circular economy. It targets businesses engaged in industrial, agri-industrial, artisan, industrial services, and research centre activities.
These programs affect the building sector in different ways by promoting more sustainable building protocols and funding green interventions.
For example, within the PNRR approximately 108 billion euros are allocated for the construction sector within the framework of the six missions. It is also estimated that over 20% of PNRR resources could have direct impacts in terms of urban regeneration. Examples include projects related to the attractiveness of villages (1 billion), the protection and enhancement of rural landscapes and architecture (600 million), seismic safety of places of worship (800 million), new school buildings to reduce energy consumption (800 million), and the energy efficiency of judicial buildings (412 million). Additionally, there are integrated funds for tourist enterprises (1.8 billion), ecobonus and sismabonus 110% for energy efficiency and building safety (13.9 billion, plus an additional 4.6 billion from the complementary fund). Furthermore, there are 2.8 billion for the Quality of Living Program (Pinqua), 3 billion for integrated urban plans with 200 million from the complementary fund, 700 million for sports and social inclusion, 1.6 billion for safe and sustainable hospitals, and another 6 billion for interventions aimed at resilience, territorial enhancement, and energy efficiency of municipalities.
In general, the green transition process is being sped up by the EU Next Generation Plan that imposes coherence among Italian plans and policies. As a result, there is a heightened national focus on greenhouse gas emissions and the worsening negative effects of the current climate. Strategies aimed at decarbonizing the building stock and considering embodied carbon, as well as protecting water resources and promoting their sustainable use, are being promoted. Investments in the circular economy also led to the spread of initiatives dedicated to Life Cycle Assessment and investments by designers and individual industrial sectors in the reuse of waste and materials to minimise the direct and indirect use of natural resources.
There are policies and practices aimed at reducing the effects of climate change on an urban scale in Spain, and many of these can be integrated into heritage adaptive reuse projects. Given the interconnectedness of climate change impacts with urban development and cultural heritage preservation, incorporating climate mitigation and adaptation measures into heritage reuse initiatives is crucial for creating resilient and sustainable urban environments.
Regarding the mitigation of Urban Heat Islands, the incorporation of green roofs and vertical gardens in heritage buildings can mitigate the urban heat island effect by providing natural insulation, reducing heat absorption, and reinforcing biodiversity.
Implementing rainwater harvesting systems in heritage buildings can help manage stormwater runoff, reduce flood risk, and alleviate pressure on urban drainage systems during extreme weather events, and installing permeable paving and sustainable drainage systems in heritage sites can reduce surface runoff, prevent flooding, and recharge groundwater aquifers.
Projects such as the rehabilitation of historic buildings in Barcelona’s Gothic Quarter with energy-efficient HVAC systems, solar panels, and green roofs demonstrate how heritage adaptive reuse can contribute to climate mitigation and energy efficiency is an example of this integration.
Belgium has regulations that encourage life-cycle analysis of buildings to assess and minimize their long-term environmental impacts. This includes evaluating the carbon footprint and resource efficiency of renovation projects. Moreover, the demolition of unprotected buildings is tightly regulated to ensure waste reduction and material recycling, promoting a circular economy approach in the construction sector (Circular Cities and Regions Initiative) (www.commercialarchitecturemagazine.com).
Regulations concerning the life-cycle analysis of buildings ensure that adaptive reuse projects consider long-term environmental impacts. Innovations in building techniques, such as the use of recycled materials in the reconstruction of the Mechelen Schepenhuis Museum, the Gare Maritime, and our testbed TRACK in the Brussels’ North Station highlight the sector’s commitment to sustainability.
The Gare Maritime project concerns the renovation of a former freight station into an urban hub with integrated workspaces, events spaces, thematic retail stores and a food hall. The transformed space was renovated with respect for the original fabric and with environmentally sustainable solutions employed throughout. The Gare Maritime, covering approximately 40,000 square meters, had remained empty since the 1990s and had suffered some degradation from disuse. The implementation and results of the Gare Maritime project are each an example in circular building. The integrity of the century-old industrial building has been preserved in the redevelopment process, while its function has been modernised with durability in mind. Twelve separate modules made of cross-laminated timber structures finished with European oak have been constructed inside the Gare Maritime to hold office and retail spaces, and are completely reversible. Energy for heating and cooling is produced via geothermal wells dug 140 metres below the building. Rainwater is collected for use in the toilets, to water the more than 3,000 metres of indoor gardens and for cooling. Solar panels power the building, and some windows use an innovative tinted glazing technology which helps to regulate light and temperature inside the building. The building aims to achieve an ‘excellent’ BREEAM rating, the world’s leading sustainability assessment method for buildings. Gare Maritime will also have space for public amenities, with the public authorities being consulted to determine the best amenities to benefit the neighbourhood. Its gardens and plazas are open for everyone to enjoy.
There is a growing emphasis on developing and reviving innovative building techniques that are both environmentally friendly and suitable for the preservation of historic buildings. This includes using traditional materials and methods that are inherently sustainable and adapting them to modern building standards. Additionally, urban mining and local material sourcing are encouraged to reduce transportation emissions and support local economies (Emerald Insight) (www.commercialarchitecturemagazine.com).
The leading documents in this area are the Environmental Protection Act and the Act on Energy from Renewable Sources. Additionally, there are other acts and regulations in the sphere of environment protection.
In the context of buildings and heritage reuse, the biggest role falls on the Regulation on Energy Efficiency of Buildings. This regulation describes the required thermal characteristics of buildings and the assessment of their energy efficiency. According to the Act on Energy from Renewable Sources, the mayors of municipalities develop and submit for adoption long-term programs to promote the use of energy from renewable sources, which also include reconstruction, major renovation, major repair or remodelling of buildings that are a municipal property.
There are no specific requirements to restrict certain types of activities or encourage others when it comes to repurposing buildings that are cultural monuments. Retaining the original functions is viewed positively, but in terms of energy efficiency and green transformation, there are no specific requirements that promote certain programming over others. Of course, any activities related to the emission of harmful gasses, noise, processing of non-ferrous metals, etc., are not permitted in populated areas, and even in most industrial zones.
Regarding the life-cycle and waste management of buildings the relative document is the National Waste Management Plan, which aims at the reduction of waste and the reuse of building materials. However there are no regulations or practices that specifically regulate the life-cycle analysis and restrict the demolition of buildings in the context of carbon footprint or waste reduction.
There are no regulations or popular practices for integration of shorter supply chains of materials, recycling and reuse of building materials from existing buildings. This could be perceived as a chance for development of business ventures related to these practices because such regulations are inevitably expected to be introduced.
Private or non-profit organisations such as Association for Construction with Natural Materials and others are involved in the reinvention of vernacular building techniques and the rediscovery of forgotten ones. New Architectural Heritage foundation on the other hand focuses on the specific materials from the postwar era, which demand a completely different approach. However, such initiatives remain on a smaller scale and individual initiatives.
In Cyprus, efforts to promote sustainable practices in heritage adaptive reuse projects involve establishing a political and institutional framework that addresses environmental concerns. This framework includes policies, regulations, and support mechanisms focusing on energy efficiency, passive construction techniques, water conservation, soil remediation, and waste management. Financial incentives, certification programs like LEED or BREEAM, and public awareness campaigns further support sustainable design principles. Green transition policies, prioritising energy efficiency and renewable energy adoption, influence the planning and execution of heritage adaptive reuse projects, encouraging the integration of sustainable practices. While specific regulations regarding life-cycle analysis and demolition practices vary, broader environmental regulations and waste management policies indirectly address aspects of sustainability. Cyprus also promotes shorter supply chains and urban mining to reduce transportation emissions and encourage recycling and reuse of building materials. Efforts to revive traditional building techniques and stimulate innovation in construction align with goals of sustainability and cultural preservation, involving research collaborations, training programs, and community engagement initiatives.
In Germany alone, according to the Baukultur 22/23 Report, the task of the monument protection offices of the German federal states is to investigate the existing stocks with built heritage value, to develop and communicate scientifically sound criteria for placing them under protection. Additionally, 517 million tonnes or 90 % of the mineral raw materials mined domestically are used in buildings. In addition to new designation of settlement and traffic land, more than four hectares of landscape are stripped daily to obtain these raw materials. If the planned conversion concerns a heritage building or a house in a built heritage ensemble, the measure requires a permit under built heritage protection law. As much as built heritage protection must ensure that the fabric of the features relevant for the historic importance of a building is retained, it is this same concern that equally opens discretionary powers regarding the application of the usual building regulations. In relation to the Building Energy Act, Section 105 provides for an exemption for heritage buildings as well as for buildings with building fabric particularly worth protecting. These privileging facts for existing buildings that are particularly worth retaining can be provided by the relevant administration. Without these exceptions, the Baukultur value of regional housing landscapes and urban neighbourhoods could not be retained.
The federal Foundation of Baukultur, together with the German Association for Housing, Urban and Spatial Development, the German Retail Federation and Urbanicom drafted recommendations and addressed them to politics and policymakers in the statements titled “Stop the decline of our city centres” and “How trade and town centres can survive the crisis”. The federal “Zukunftsfühige Innenstädte und Zentren” (Sustainable inner cities and centres) programme has now been set up and equipped to develop and implement innovative model projects in 238 municipalities (September 2020 and October 2021).
The most common sustainability protocols in Italy in the field of adaptive reuse are mainly two: the Green Building Council Italia (GBC Italia) protocol, developed in 2009 and the Institute for Transparency of Contracts and Environmental Compatibility (ITACA) protocol, developed in 2004.
GBC Italia is a non-profit organisation affiliated with the broader network of World GBC. It aims to drive a transformation process in the Italian construction market by promoting third-party certification systems and its own certification protocols (the GBC systems) specifically tailored to the Italian market’s needs. These protocols establish precise criteria for the design and construction of healthy, energy-efficient buildings with a reduced environmental impact.
The Itaca Protocol is a tool for evaluating the level of energy and environmental sustainability of buildings. It has been developed by the Itaca group (Institute for Innovation and Transparency in Procurement and Environmental Compatibility – National Association of Regions and Autonomous Provinces) in collaboration with ITC-CNR. The protocol is widely adopted by numerous regions and municipal administrations in various initiatives aimed at promoting and encouraging sustainable building practices through regional laws, building regulations, tenders, urban plans, etc.
This protocol enables the verification of buildings’ performance, particularly in terms of energy consumption, energy efficiency, environmental impact, and human health impact.
While the primary focus of heritage preservation is on cultural and historical significance, there is increasing recognition of the need to incorporate sustainability principles into these projects. Several policies, regulations, and initiatives promote the integration of environmental considerations, such as energy efficiency, passive construction, and resource recovery, into heritage adaptive reuse efforts.
Adaptive reuse projects in Belgium are seen as opportunities to develop green skills among professionals involved in these projects. Training and education programs are increasingly focused on sustainable building practices and the conservation of heritage buildings. These programs not only aim to equip workers with the necessary skills but also focus on incorporating sustainable practices that align with global sustainability goals (Circular Cities and Regions Initiative) (www.commercialarchitecturemagazine.com).
There are considerable innovations in green practices within the field of heritage adaptive reuse. For example, projects that transform old industrial buildings into community spaces often include the installation of modern HVAC systems that significantly reduce energy consumption. Such projects not only preserve the cultural heritage of the buildings but also transform them into examples of sustainability (IntechOpen – Open Science Open Minds) (MDPI).
Often, projects related to the adaptation of tangible cultural assets are closely linked to the concept of sustainability and the preservation of existing environments and resources for future generations. This goal should be pursued alongside enhanced knowledge of materials and techniques from the object’s specific period, which often involve more manual labour and increased potential for reusing materials, as well as various ways to preserve and restore them. The transformation of cultural assets provides an excellent opportunity to develop skills related to active community engagement, and often also to social innovations.
Innovation in the field of natural materials is applied to some of the examples of adaptive heritage reuse, especially where technically needed because of the original building substance. Such innovations can be observed from two directions. The first one is through the reinvention of vernacular building practices through private organisations such as Meshtra – Traditional knowledge and crafts. Although not an innovation in a purely technical sense, it could be considered as an advance in the direction of a more sustainable built environment. The other direction is through international mass manufacturers of building materials, who research and develop technical solutions in the form of building materials with natural components, especially designed for cultural heritage.
Every building that is preserved and repurposed instead of being demolished is always more environmentally sustainable in terms of responsible consumption and production compared to any new construction. However, there is considerable room for improvement in public outreach and engagement in projects that represent common value. The potential of such projects to be a generator of innovations related to materials or methods for sustainably extending their lifespan is not fully utilised, nor is their social impact and ability to reduce inequalities.
In Cyprus, initiatives for adaptive reuse often involve integrating green skills and competences among the human resources engaged in such projects. These encompass a wide range of knowledge, abilities, and practical techniques geared towards sustainability, energy efficiency, and environmental stewardship within the context of heritage conservation and adaptive reuse. This integration occurs through various means, including training and education programs aimed at equipping professionals, craftsmen, and workers with relevant green skills, such as sustainable construction techniques and energy-efficient building practices. Capacity-building activities further enhance the green skills of architects, engineers, and planners through workshops and seminars, fostering interdisciplinary collaboration and innovation in sustainable design principles. Collaborative partnerships among government agencies, educational institutions, industry associations, and non-profit organizations facilitate knowledge sharing and the dissemination of best practices in green construction. Additionally, community engagement efforts raise awareness about the importance of green skills in heritage conservation, empowering local communities to contribute to sustainable development initiatives and cultural heritage preservation. Overall, these initiatives underscore the commitment to sustainability while promoting the preservation of cultural heritage in Cyprus.
In the field of heritage adaptive reuse in Cyprus, there have been notable innovations in the adoption of green practices and the emergence of green jobs aimed at promoting sustainability and environmental responsibility. One example is the integration of passive design principles and energy-efficient technologies in the renovation of historic buildings for adaptive reuse. This includes strategies such as improving insulation, optimising natural lighting and ventilation, and installing renewable energy systems like solar panels or geothermal heating. Another innovation involves the use of sustainable building materials sourced locally or from recycled sources, reducing the carbon footprint associated with construction activities. Furthermore, initiatives to incorporate green roofs, rainwater harvesting systems, and permeable pavements into heritage adaptive reuse projects contribute to environmental conservation and climate resilience. These innovations not only enhance the energy performance and environmental sustainability of heritage buildings but also create opportunities for green jobs in fields such as sustainable construction, energy auditing, and green building certification. Overall, these examples demonstrate how the integration of green practices and the development of green jobs play a vital role in advancing sustainable development goals while preserving cultural heritage in Cyprus.
The overall environmental sustainability of heritage transformations in Cyprus can be defined by their ability to balance the preservation of cultural heritage with the promotion of sustainable development principles. Heritage transformations that prioritise energy efficiency, resource conservation, and environmental stewardship contribute positively to environmental sustainability. By incorporating green building practices, such as adaptive reuse, energy-efficient retrofits, and sustainable materials, heritage transformations can reduce carbon emissions, minimise waste generation, and enhance resilience to climate change impacts. Moreover, heritage transformations that respect the natural environment, protect biodiversity, and promote sustainable land use contribute to the achievement of several Sustainable Development Goals (SDGs) in Cyprus, including Goal 11 (Sustainable Cities and Communities), Goal 13 (Climate Action), Goal 15 (Life on Land), and Goal 17 (Partnerships for the Goals). By aligning heritage transformations with SDG objectives, Cyprus will leverage its cultural heritage assets to advance environmental sustainability and promote inclusive and sustainable development for present and future generations.
In terms of green skills and competences for adaptive reuse, there are several skills that are discussed such as:
In the survey of the skilled trades, 69 % of the firms were convinced that a return to manual skills is relevant for the construction sector. The interaction of traditional techniques and new possibilities (such as through automation or laser-assisted measurement of works) could also make digital natives enthusiastic about the skilled trades. DIY stores now not only offer equipment to hire but also training courses for all those who enjoy DIY work.
Green-skills for Organization / Community (e.g social innovation and entrepreneurship; environmental ecosystem and awareness, project management, digital skills…). grasp the local context through green and sustainable values to support equity and justice for current and future generations and learn from previous. generations for sustainability.
In the context of the green skills, it is important to recognise and embrace the value of diverse perspectives and experiences is crucial for developing inclusive and effective policies. Different communities bring unique insights, knowledge, and experiences that can contribute to a more comprehensive understanding of the challenges and opportunities associated with sustainable development. By involving diverse voices in the decision-making process, policymakers and stakeholders can:
Additionally, in Frankfurt University of Science, there has been a summer academy offering the course for Green Building in Germany: Adaptive Reuse of Industrial Monuments and Sites. By completing this course, students will be able to better understand and design energy and stormwater systems for large brownfield sites and buildings. We will produce a polished document that captures the work of the class design exercise and associated research. The design of low-carbon districts and buildings, focusing on adapting post-industrial landscapes and buildings to new ecologically restorative uses. The course will examine the adaptive reuse of both listed industrial monuments and other non-listed structures. We will consider various strategies for intervention at both the landscape scale and the building scale. (https://www.frankfurt-summer-university.de/en/courses/green-building-in-germany-adaptive-reuse-of-industrial-monuments-and-sites/)
The increased focus on green transition is leading to the expansion of professions operating in this field. As a result, the market demands more specialised technical experts capable of guiding the building or restoration process to ensure the sustainability of the final product. Consequently, companies and institutions dedicated to training these new professionals are emerging.
Good examples of this phenomenon are the organisations Green Building Council Italia and the Institute for Innovation and Transparency in Procurement and Environmental Compatibility – National Association of Regions and Autonomous Provinces (ITACA). In addition to providing green certifications for buildings, they also offer training programs for technicians who wish to learn how to issue them
Besides technical requirements for greener performances, environmental sustainability in the adaptive reuse of heritage is often addressed by recurring to a circular economy approach. This approach emphasises minimising waste and maximising resource efficiency through the continuous reuse, refurbishment, and recycling of materials. Principles belonging to this paradigm, such as designing for longevity, encouraging material recovery, and promoting regenerative practices, are considered foundational for shaping processes and resource management within these projects. By incorporating circular economy principles, adaptive reuse initiatives not only preserve cultural heritage but also contribute to broader environmental goals, creating sustainable, resilient, and resource-efficient communities.
Spain has seen considerable innovations in the field of green practices and green jobs used in heritage adaptive reuse. Examples include Energy-Efficient Retrofitting, Renewable Energy Integration (integration of renewable energy sources, such as solar panels and wind turbines, into heritage buildings allows for on-site generation of clean energy, reducing reliance on fossil fuels and contributing to climate mitigation efforts); Water Conservation Measures (implementation of water-saving technologies, such as rainwater harvesting systems, greywater recycling, and low-flow fixtures, helps conserve water resources and reduce water consumption in heritage buildings and landscapes); and ecologically-sensitive approaches to landscaping and site design, including native plantings, biodiversity enhancements, and habitat restoration, promote ecological resilience and support local ecosystems within heritage sites.
Other very useful tools for the documentation and conservation of cultural assets, linked to new technologies and which are rapidly developing, are georadar systems and drones, especially relevant for the study of archaeological heritage since they allow the necessary data to be obtained before carrying out the excavation itself. Georadar systems are used for geophysical prospecting, facilitating the non-invasive characterisation and delimitation of archaeological structures, while drones are extremely useful for the documentation, research and safeguarding of sites, especially with regard to imaging and monitoring. Moreover, other tools include the BIM methodology, GIS programs, LiDAR technology, monitoring via sensors or robotics, which help, among other tasks, to monitor environmental conditions, visualise possible damage (avoiding the handling of delicate assets, for example) or perform non-invasive analyses. One noteworthy example of robotics applied to heritage is that of devices for exploring underwater sites, designed for their documentation, surveillance and protection.
The aforementioned digitisation of heritage is an essential resource, especially for documentary and bibliographic heritage, as well as for assets sensitive to adverse or fluctuating environmental conditions and handling. It is an essential tool for preservation and dissemination, since today there is affordable equipment that can reproduce incredibly high-quality images. It is important, however, to point out one issue that goes unnoticed when this type of project is undertaken, and that is the problem of obsolescence in the preservation of digital and digitised heritage. In order to ensure the conservation of these collections, strategies must be developed that focus on updating digital formats and systems, the ability to create sufficient backup copies, and the establishment of minimum quality standards for the documents generated or the exchange of information, respecting copyrights and national and international legislation in this regard.
Other highly relevant resources for asset management that are linked to these digitisation processes include 3D recreations and video mapping, virtual reality and augmented reality. Virtual reality makes it possible to design and reproduce fictional images, while augmented reality completes an existing scenario enriched with digital elements. Both can have interesting applications when it comes to recreating architectural structures that have disappeared, showing the evolution of the natural landscape, completing the physical shape of an asset that is not fully intact, reproducing lost processes and techniques, etc.
The overall environmental sustainability of heritage transformations in Spain varies depending on the specific project and its implementation. While heritage adaptive reuse projects have the potential to contribute positively to environmental sustainability by conserving historic buildings, reducing carbon emissions, and promoting sustainable practices, they may also pose challenges related to energy consumption, resource use, and environmental impacts. In general, heritage transformations in Spain have a positive impact on sustainable development goals (SDGs) which are at the core of national strategies and plans, by: