Freeboard Pools are the traditional design, where the water level is normally around 150mm below the finished floor level. Decklevel pools are built so the water weirs over the top, through a grating set into the pool deck, and into a channel below. This means the depth of your pool is the depth of the water. Decklevel pools normally have a tiled finish. Mostly the decision between freeboard or decklevel is down to a mixture of aesthetics and budget. The extra construction costs involved in forming the channel and balance tank necessary in a decklevel pool, mean this is a more expensive option.