Over the past few years, Jan Peter Wingerder has been researching the formal language of materials. Recently, the results of this research have been published in the book: ‘Brick, An Exacting Material’, in which the usage of brick plays a central role. By means of interviews, images and examples the subject is discoursed. Marlies Rohmer was interviewed for the book. Dwelling upon two of her projects, Bloemhof and Fusion, she elaborates on her vision on the use of bricks.