The circular columns that can be seen throughout the building were cast in fairface cardboard pillar formers. Circular columns were chosen for Bottleworks as they are less obtrusive than other shapes and add to the space and light of workspaces. The choice of fairface cardboard pillar formers, together with excellent workmanship in the placement and compaction of the concrete, resulted in a high quality smooth and uniform concrete finish.
The casting of board mark finished walls required considerable planning. A number of trial panels were cast involving close collaboration between the design team, the main contractor, the concrete sub-contractor and the producer. A number of different timber types were trialed, with consideration given to the type of finish that would be achieved including the mark from the grain from the timber and the level of etch. Additionally, numerous different concrete mixes were trialed with colour and the effect of aggregate proportions on the finish being key considerations.