On pools where structural load is an issue it is possible to reduce the pool depth using polystyrene blocks topped with a reinforced concrete slab. Either new pipework is installed or the existing sump pipework is extended up to the new floor level. Composite GRP sump boxes are manufactured and connected onto this pipework.
High Density polystyrene block are trimmed and installed to fill the void. Steel tie bars are drilled and resin anchored to the perimeter walls and tied into steel reinforcement mesh.
A concrete slab is then poured and levelled. This must then be left to cure for approximately 4weeks prior to lining.