The project required a basement due to height restriction laws imposed by the local government, which did not allow for any building to obstruct the view from the city. This resulted in the need to build below grade, which put the sea level above the 40 cm thick slab.

Waterproofing for the slab was initially proposed with a bentonite membrane, which would have been almost impossible due to the jobsite conditions, which would have prematurely hydrated the bentonite. Instead, a full tanking solution was applied using Krystaline Add1 concrete, metal waterstops and joint design treatments with Krystaline CSH products. This allowed for all five stages of the slab to be poured while controlling the level of the water.

Krystaline Add1 dosed at 1 kg/m³ to waterproof a total of 2240 m³ of concrete for the basement slabs and walls.