The spa is separated from the pool by a glass weir, which had to be specially engineered to allow for an extra layer of steel reinforcing. A 40 mm x 90 mm rebate was constructed in the concrete shell so that a 15 mm toughened and heat soaked panel could be installed to act as this dividing levee. This seemingly simple piece of glass has been anchored with a non shrink grout and effectively keeps the hot water in the spa from spilling out into the main body of pool water. The swimming pool and spa shells were constructed with a square floor to wall join instead of the curved radius used in standard pool construction. The purpose of this detail was to accommodate the proposed large format bluestone tiles, which cannot curve up the walls of the pool, but instead must abut straight up to the joins. Large format tiles also require a high degree of accuracy and precision in the building and finishing of the pool, as the tiles must sit perfectly flat, with no discernible rises or dips across the surface of the pool walls or floor. Photography by: George Kochukudiyal