Due to the erratic water table in this area when emptying the pool water had saturated the ground underneath and created a bulge in the base of the lining.
This problem was rectified by slicing through the centre of the base to drain it and filling the ground underneath with drainage stone. The base was sealed and two coats of flow coat were applied to seal and protect.
Depth markings were outlined to pool for safety as this property was a Bed and Breakfast.