Domestic indoor swimming pool with severe water table.
As you can see from the photos below this swimming pool was originally fitted with a plastic liner and fibreglass steps. When the liner was initially installed there were no water table issues apparent. However, when the pool was drained down for subsequent maintenance it was found very quickly the whole of the liner was floating. This was due to a large volume of water coming through cracks in the bottom of the pool, upon site inspection it was discovered that the building of a recent housing estate close to the property had diverted a large underground aquifer straight underneath the swimming pool. At only 1m below ground level, the water table was substantial and without any intervention the ground water was able to fill up to 2/3rds full. This is demonstrated by the video below which shows the water spouting through a small hole in the steps. Due to this water table problem, a refitting of a plastic liner was no longer possible. We were called in to fit the whole pool with our GRP lining, this was by far the worst water table we have ever encountered, however we were still able to successfully carry out the in-situ lining. As the pool was 100% waterproof after our work was finished the pool was immediately filled to counteract the outside pressure and is now a stable and working swimming pool. We were very pleased with the outcome of this project as to our knowledge there was no other solution to return this swimming pool back to working condition.