27.01.2026

AI for detecting construction defects: The eye of the algorithm

Building design

Guilherme Cunha photographed a man walking across a construction site in the historic Othon building in São Paulo - a monument full of history and architectural significance.

A building is only as good as its weakest point. But who will find it first – the construction manager with decades of experience or the algorithm? Artificial intelligence for detecting construction defects is more than just a digital game: it is changing the entire understanding of quality assurance, liability and responsibility in construction. Welcome to the age in which the eye of the algorithm reads every joint.

Artificial intelligence (AI) is revolutionizing defect detection on construction sites in Germany, Austria and Switzerland.
From photo analysis to predictive maintenance: AI-supported systems detect damage faster and more objectively than the human eye.
Digital construction sites are becoming a testing ground for automation, data analysis and new responsibilities.
The legal, ethical and technical challenges are enormous – and the debate about the use of AI is heated.
Architects, engineers and building contractors need completely new digital skills to keep pace.
The promise of sustainability is being put to the test: fewer errors, less reworking, more resource conservation – or just another data graveyard?
The global discourse shows: Those who consistently use AI to detect defects are setting new standards – and shifting the balance of power in construction.
The vision: error prevention through permanent digital monitoring, but also the risk of a lack of transparency and algorithmic arbitrariness.

AI on the construction site: between innovation and omnipotence

It sounds like a promise from a software manufacturer’s future brochure: a construction site on which flying drones, permanently installed cameras and mobile devices constantly record and analyze images and provide real-time feedback on where the plaster is not holding, the waterproofing is missing or the façade is showing cracks. But this is exactly what is already being tested in pilot projects in Germany, Austria and Switzerland. AI-supported image analysis not only recognizes visible damage, but can even use machine learning and deep learning to detect patterns that indicate future problems. This means that inspections are more precise, faster and less subjective – at least in theory.

But how far is it actually being used in practice? While large construction groups and innovative planning offices in major cities such as Munich, Zurich and Vienna are experimenting with AI systems, skepticism still prevails on many medium-sized construction sites. There are many reasons for this: data protection concerns, a lack of standards, high investment costs and, last but not least, the question of whether the algorithm really sees better than the experienced site manager. After all, construction sites are still chaotic, unpredictable and full of isolated incidents. The dream of a digital control room clashes with the reality of rain, dirt, changing trades and improvised solutions.

And yet: the direction is clear. AI is becoming an integral part of quality assurance in construction. It is being integrated into existing systems such as BIM, supplementing traditional inspections and creating new interfaces between planning, execution and operation. The real revolution is not so much the technology itself, but the shift in responsibility: if an algorithm overlooks a defect, who is liable? And what does this mean for the role of architects, engineers and experts?

Another field that is being massively influenced by AI is documentation. Automated logs, seamless photo documentation and self-learning checklists make verification and defect management more efficient – at least for those who have mastered the use of the new tools. For everyone else, there is a risk of losing digital control: anyone who does not understand what the AI recognizes – and what it overlooks – quickly loses control of their own project.

The big debate is therefore not about whether, but about how: How much control do we give up? How transparent and comprehensible are AI decisions? And how do we ensure that it’s not the algorithm that wins in the end, but the quality of the building?

Smart fault detection: technology, training and pitfalls

The technical foundations of AI-based defect detection are as fascinating as they are complex. Digital cameras provide high-resolution images that are analyzed using deep learning algorithms. Artificial neural networks are able to identify cracks, traces of moisture, material deformations and even invisible damage based on patterns. The training data comes from decades of damage cases, simulations and current construction site images. However, for the system to function reliably, it requires an enormous amount of data – and constant refinement by human experts.

In Germany, Austria and Switzerland, individual construction companies and research institutions are already relying on such systems. The technical challenge lies in adapting the algorithms to the diversity of construction site reality: Different materials, changing light conditions, dirt, moisture and, last but not least, the creativity of those carrying out the work make error detection an ongoing experiment. The AI has to learn to distinguish between genuine defects and harmless deviations – and so far this has only been possible with a great deal of readjustment.

Another problem is the integration of AI tools into existing processes. While digital planning tools such as BIM are now relatively widespread, there is often a lack of interfaces when it comes to detecting defects. Many systems work in isolation, deliver results that cannot be easily processed further or are simply too complicated for everyday construction site work. Developers need to design the tools in such a way that they actually provide relief – and do not become a further obstacle to digitalization.

The training of skilled workers plays a key role here. Anyone who wants to work with AI needs to understand how the algorithms work, what sources of error there are and how the results can be interpreted correctly. This requires new digital skills that have so far hardly been taught in traditional architecture or civil engineering courses. As a result, a new generation of construction professionals is growing up that has to assert itself between tradition and digitalization – and is often left to its own devices.

The biggest technical challenge, however, remains the quality of the data. Poor images, incomplete documentation or incorrectly labeled training data lead to error detection, which in the worst case can create more problems than it solves. In the end, the realization remains: AI is only as good as what you feed it – and that requires care, discipline and a good dose of mistrust towards your own technology.

Sustainability, liability and the new role of planning

The promise of AI-supported defect detection is: fewer defects, less rework, less waste of resources. In fact, initial pilot projects have shown that defects detected at an early stage can lead to significantly lower costs, less material consumption and shorter construction times. This is not only economically attractive, but also contributes to sustainability: every construction defect that is avoided saves energy, raw materials and CO₂ – and improves the service life of the building.

But the reality is more complicated. The introduction of AI systems is itself resource-intensive, requiring new hardware, data centers and continuous maintenance. Added to this is the energy consumption for data processing, which can be considerable depending on the application. The question of whether the ecological benefits actually outweigh the costs has therefore not been conclusively clarified – and depends heavily on the quality and efficiency of the systems used.

Another key issue is liability. Traditionally, the architect or construction manager is liable for overlooked defects – but what happens if the inspection is carried out by an AI? Who is responsible if the algorithm fails to detect a defect or misclassifies damage? The legal situation is currently unclear, standards and norms are largely lacking. Lawyers and insurers are facing new challenges that could fundamentally change the liability structure in construction.

This will result in new roles for planning and construction practice. Architects and engineers will become data managers who not only draw designs, but also train algorithms, maintain digital twins and evaluate defect reports. The construction site is becoming a hybrid space in which human experience and machine precision compete with each other – and ideally complement each other. Those who miss the boat here risk not only economic disadvantages, but also the loss of their own creative sovereignty.

A critical examination of the use of AI remains essential. The risk of algorithmic bias, the possibility of false alarms or systematic blind spots and, last but not least, the question of transparency must be discussed openly. Because one thing is clear: ultimately, responsibility for construction quality and sustainability must not be delegated to a black box – it remains a task for experts with digital expertise.

Global perspectives: Between vision and reality

A look beyond the German-speaking world shows: AI-supported defect detection is already more widespread in countries such as the USA, China and Singapore. Major projects there are monitored using smart cameras, drones and self-learning systems as standard. The results are impressive: fewer rectifications, faster acceptance, higher construction quality. But there are downsides here too: The systems are expensive, require technical expertise and raise fundamental questions about data protection, monitoring and fairness.

In comparison, the approaches in Germany, Austria and Switzerland often seem hesitant. There are many reasons for this: strict data protection laws, federal structures and a deep-rooted skepticism towards technical control bodies. At the same time, there is growing pressure to remain internationally competitive – and not only to discuss innovative solutions, but also to implement them consistently.

The global architecture and construction industry has long been discussing the role of AI not just as a tool, but as a driver of fundamental change. Smart defect detection is just one piece of a much larger puzzle: it stands for the digitalization of the entire construction process, for the integration of planning, execution and operation – and for the renegotiation of responsibility and trust.

Critics warn of a technocratization of construction, with human experience and intuition increasingly taking a back seat. The danger: an algorithm that makes decisions based on statistical probability may recognize errors that no human can see – but may also overlook what only the experienced eye can notice. Visionaries, on the other hand, see AI as an opportunity to make construction safer, more efficient and more sustainable – and to redefine the role of the architect.

As is so often the case, the truth lies somewhere in between. AI will not replace the construction industry, but it will fundamentally change it. Those who embrace it can take quality assurance to a new level – but must also be prepared to take responsibility, share knowledge and engage in a permanent learning process. This is uncomfortable, but there is no alternative.

Conclusion: The eye of the algorithm sees differently – but not everything

Artificial intelligence for detecting construction defects is more than just a fashionable buzzword. It is a tool that promises precision, speed and transparency – but also creates new uncertainties. The German-speaking world is at the beginning of a profound change that affects not only technology, but also culture, responsibility and training. Whether AI will become the new authority in construction supervision or the next digitalization flop will be decided in the coming years. One thing is certain: those who seize the opportunities without ignoring the risks will help shape the construction of tomorrow. Everyone else should dress warmly – because the eye of the algorithm never sleeps.

02.01.2025

Society

Vandersanden Linge: The paving brick for ambitious projects

Building design

The large paving brick in Linge ® format from Vandersanden: Calm appearance, sustainability and an authentic character. Read more here. Sustainability and authenticity have established themselves as lasting trends in the design of public spaces. The Linge® format from Vandersanden picks up on current developments and offers creative solutions. The pavers in the special large format provide […]

The large paving brick in Linge ® format from Vandersanden: Calm appearance, sustainability and an authentic character. Read more about it here.

Sustainability and authenticity have established themselves as lasting trends in the design of public spaces. The Linge® format from Vandersanden picks up on current developments and offers creative solutions. The pavers in the special large format provide a rustic and calm look. At the same time, they perfectly cover the sustainability aspect.

Already very successful in neighboring countries, this unusual format is also gaining ground in Germany. It offers many facets, especially for urban architects. In addition to the different formats, the bricks also differ in terms of their properties. Vandersanden supplies them in four basic variants, each with its own individual characteristics:

The Linge® paving brick in the 80/80 format(L 245 x W 80 X H 80 mm) is the most robust brick in this series. It has three sanded sides in molded back, all of which are suitable as visible sides. This means it can be reused up to three times and always ensures a unique and fresh street scene.

The Linge® paving brick in 80/70 format(L 245 x W 80 x H 70 mm) is a special version with a high edge that is offset to the rear. Among other things, this prevents chipping under heavy traffic loads. As a result, the road surface retains both its look and feel.

The Linge® format 80/60(L 245 x W 80 X H 60 mm) has a lower height of 60 mm. This means that fewer raw materials are required during production. The low height is more than sufficient for the design of squares, sidewalks and cycle paths.

The Linge® clinker in the 60/80 format(L 245 x W 60 X H 80 mm) is the big and strong brother of the classic Waal format Riegel.

The large format of Vandersanden’s Linge ® bricks reduces the number of joints in squares, streets and paths. The rustic look of the bricks gives them an authentic appearance. In addition, their long service life, reusability and low number of joints underpin Vandersanden’s sustainability concept. The innovative clinker bricks are available as molded bricks, waterstruck or, in some cases, extruded, sanded or unsanded.

The innovative clinker bricks are available as molded bricks, waterstruck bricks or, in some cases, as extruded bricks, sanded or unsanded. You can find more information at www.vandersandengroup.de.

Also interesting: Schwerin architects realize multi-generation house in an unusual way with the help of Vandersanden clinker bricks.

17.01.2025

Exhibitions, Industry news

Ferdinand Hodler as an established figure of Berlin Modernism

Building design

Visitor to the exhibition "Ferdinand Hodler and Berlin Modernism" in front of the artist's "Self-Portrait (The Angry Man)". Photo: Harry Schnitger / Berlinische Galerie

They are icons of modernism: the expressive figure paintings, mountain landscapes and portraits by Ferdinand Hodler (1853-1918). Even during his lifetime, the work of the Swiss painter, who helped shape Symbolism, attracted great international attention. But what is hardly known today is that Hodler’s path to fame led via Berlin, as an exhibition at the Berlinische Galerie currently shows (still […]

Ferdinand Hodler is undisputedly the most popular painter in Switzerland today and is considered a key figure in modern art alongside Paul Cézanne, Vincent van Gogh and Edvard Munch. His work was last shown on a large scale in Berlin in 1983. The current exhibition at the Berlinische Galerie (until January 17, 2022) presents the artist for the first time as a major figure in Berlin Modernism. A selection of his most important symbolist figure paintings, which established Hodler’s success in the German imperial capital, his unmistakable mountain landscapes and outstanding portraits, which already inspired the contemporary Berlin public, can be discovered: “In the Künstlerbund exhibition. Hodler made the strongest impression,” noted the influential collector and patron Harry Graf Kessler in his diary in 1905.

The exhibition “Ferdinand Hodler and Berlin Modernism” traces the Swiss artist’s success story on the Spree. Here, his works were first shown at the Great Berlin Art Exhibition, then at the Berlin Secession and in renowned galleries in the city such as the Fritz Gurlitt and Paul Cassirer art salons. Hodler was already perceived as a typical exhibition artist in his time, and his career spread beyond Switzerland’s borders throughout Europe. After initial successes at home, where Hodler’s work was the subject of controversial debate, he built up relationships in Paris, Munich, Vienna and Berlin, where he exhibited his works in the context of leading avant-garde associations.

Ferdinand Hodler gradually won over the Berlin public

The rather sober Prussian mentality in Berlin initially made it difficult for Hodler to assert himself with his symbolist figure paintings. The Swiss artist polarized opinion. He inspired artists and critics who were open to modernism. He was only gradually able to win over the general public, who were still familiarizing themselves with Naturalism and Impressionism in Berlin. When gallery owner Paul Cassirer included Hodler’s naturalistic early works as well as portraits and landscapes in a group exhibition in 1907, the artist gained wider acceptance in the city. It was also Cassirer who organized an extensive monographic exhibition of Hodler’s work in 1911. As part of a larger exhibition tour that included Cologne, Frankfurt am Main, Berlin and Munich, it took into account all facets of Hodler’s work. The landscapes, which enjoyed great popularity among collectors, were particularly emphasized.

The second half of the 1900s saw the emergence of Expressionism in Berlin. For the metropolitan art scene, this led to a paradigm and generational shift around 1910/11. Hodler was already considered a pioneer of Expressionism and abstraction at the time due to his tense outlines, which seem almost comic-like to us today, and his free use of color and form.

The “Hodler case”

When the Swiss artist, together with other artists and intellectuals, signed a protest against the shelling of Reims Cathedral by German troops in Geneva immediately after the start of the First World War, this triggered a wave of indignation in Germany. The press turned it into the “Hodler case”, which led, among other things, to the painter being expelled from German artists’ associations. By the end of the war, however, the artist, who died in May 1918, had been largely rehabilitated in Germany.

Paul Klee on Ferdinand Hodler

According to the artist Paul Klee in 1911, contemporaries saw Hodler above all as a “portrayer of man who knows how to shape the soul through the body”. Hodler’s art focused on simplification and grandeur. The timelessly elegant postures and delicate faces of his dancers and young men are still captivating today. They appear archaic, often serious and yet also animated, full of lightness and life. Hodler drew inspiration for his art from nature, of which he understood people to be a part. The air that his figures breathe and that blows around his mountains is cold and clear. As Hodler himself wrote in one of his programmatic texts, the artist “shows us an enlarged, simplified nature, freed of all details”.

The exhibition “Ferdinand Hodler and Berlin Modernism” shows around 50 paintings by the artist, including 30 from the Kunstmuseum Bern, which is a cooperation partner of the show. In addition, there are further works by artists from the Berlin Secession who exhibited with Hodler in Berlin, such as Lovis Corinth, Walter Leistikow, Hans Thoma and Julie Wolfthorn.

The exhibition catalog has been published in German and English.

Since 2019, the permanent exhibition “Art in Berlin 1880-1980” at the Berlinische Galerie has been accessible to blind and visually impaired visitors, making it possible to experience art with multiple senses. In close cooperation with the German Association for the Blind and Visually Impaired (DBSV), work was carried out over two years to equip the collection presentation “Art in Berlin 1880-1980” with tactile media, a guidance system and a museum app to create an inclusive art experience.

Reading tip: Four cities in the Leichter Reisen working group – Emden, Rostock, Magdeburg and Erfurt – are presenting accessible art museums and their special exhibitions in winter 2021. Find out more here.