The exposed concrete surfaces in the building have a bush-hammered finish. The mechanical hammering process, in which the stone aggregate is chipped open, evens out differences between areas, lending the surface a continuous, almost velvety consistency that has an authentic appearance when viewed up close. The arrises are boasted, since they could not be bush-hammered without damaging them. As a result, the surfaces have a fine edge that heightens the craft-like appearance even further.