we closed our office in the beginning of 2016, we had a great time working with you, at the moment we will conquer the challenges that our work in several universities have to offer. 

We are a small team, we love what we do and try to think outside the box 

Tillmann Klein

Prof. Dr.-Ing. 

Tillmann Klein


Born in Wesel, Germany

Study in architecture at the RWTH (Technical University) Aachen and the Kunstakademie (Arts Academy) Düsseldorf, Germany

Tillmann Klein studied architecture at the RWTH Aachen, completing with a degree in 1994. From then on he worked in several architecture offices, later focussing on the construction of metal and glass facades and glass roofs. Simultaneously he attended the Kunstakademie in Düsseldorf, Klasse Baukunst, completing the studies in 2000 with the title “Meisterschüler”. In 1999 he was co-founder of the architecture office rheinflügel baukunst with a focus on art related projects.

In 2005 he was awarded the art prize of Nordrhein-Westphalen for young artists.Since September 2005 he leads the Facade Research Group at the TU Delft, Faculty of Architecture and since 2008 he is director of the façade consulting office Imagine Envelope b.v. in Rotterdam.

Tillmann Klein organises the international façade conference series ´The Future Envelope´ at the TU Delft and is editor in chief of the scientific open access ´Journal of Façade Design and Engineering´ in cooperation with Ulrich Knaack. Since 2015 he is guest professor for Architectural Design and Building Envelopes at the Technical University Munich.

Marcel Bilow

Ass. Prof. Dr.- Ing. 

Marcel Bilow


Born in Bielefeld, 1976, Germany

Study in architecture at the Hochschule OWL Detmold - Germany 

Marcel Bilow studied architecture in Detmold at the University of applied sciences in Detmold Germany and finished with honours in 2004. Before the study he did an apprenticeship as a bricklayer. In 2001 he started the architecture office raum204 with Fabian Rabsch. After receiving his diploma he worked in the chair of Ulrich Knaack design for construction as head of research and development in Detmold. Since 2006 he joined the façade research group at the TU Delft and started his phd about international facades which he gained in 2012 in the chair of Design of Construction from Ulrich Knaack in Delft. Since 2008 he is director of imagine envelope b.v. in Rotterdam. From 2012 on he changed his position in Delft and joined the chairs of Mick Eekhout product design and Thijs Asselbergs as an assistant professor.

Marcel Bilow is known as a collector of skills, author of several books and head of the bucky lab in which he teach students to develop and build full scale prototypes and was awarded as teacher of the year 2014-2015 in the faculty of architecture at the TU Delft.

This year he is also guest professor in the faculty of architecture TU Darmstadt within the unit of digital design in the chair of Oliver Tessmann.  




Ulrich Knaack

Prof. Dr.-Ing.

Ulrich Knaack


Born in Darmstadt, 1964 Germany

Study in architecture at the RWTH (Technical University) Aachen


Professor Dr. Ing. Ulrich Knaack was trained as an architect at the RWTH Aachen / Germany. After earning his degree he worked at the university as researcher in the field of structural use of glass and completed his studies with a PhD.

In his professional career Knaack worked as architect and general planner in Düsseldorf / Germany, succeeding in national and international competitions. His projects include high-rise and offices buildings, commercial buildings and stadiums.

In his academic career Knaack was professor for Design and Construction at the Hochschule OWL / Germany. He also was and still is appointed professor for Design of Construction at the Delft University of Technology / Faculty of Architecture, Netherlands where he founded the Façade Research Group. In parallel he is professor for Façade Technology at the TU Darmstadt / Faculty of Civil engineering/ Germany where he participates in the Institute of Structural Mechanics + Design.

He organizes interdisciplinary design workshops and symposiums in the field of facades and is author of several well-known reference books, articles and lectures.