A liner swimming pool is where a vinyl liner is used instead of a fixed structure like masonry or reinforced concrete. The pool needs excavation, but the ‘structure’ of a liner pool is not reinforced and is not watertight, to allow movement in the groundwater pressure. The flexibility of the liner means your pool won’t collapse as the ground naturally moves. Liner pools tend to have a constant depth of 1m with a graded slope or steps.
