Take a deep breath, this isn’t the end of the world, many inground vinyl liner pools are build with high ground water or a high water table. Provided you make sure that the ground water is dealt with, you shouldn’t have any issues having your inground pool last for years to come.
Water takes the path of least resistance and will essentially find any gap around your pool to fill into. If you have a high water table, high ground water or a soil base that doesn’t allow water to run through it easily, you can get what is called a “floating vinyl liner”. When the ground water pressure is more than the water pressure inside the pool, it essentially pushes the liner off the swimming pool bottom.
There are some different techniques to use depending on if you have an existing inground vinyl liner pool or if you are in the process of building your new vinyl liner pool.
Existing customers that have this type of sump have come to accept that their liner floats. The problem that generally happens is that the liner has already floated by the time the water gets to the pipe. Re-actively, all you can do is put a sump pump in the pipe to get rid of the water. What happens if you live in a climate that freezes, now you have a pump and hose that will freeze and crack.
Sumps should always be built for vinyl liner pools that have clay soils and for ALL fiberglass swimming pools
We have now proactively made a large sump under the inground vinyl liner pool to hold the water and give it a chance to seep into the ground. The stone on the shallow end and ramp, allows any water to drain to the lowest point. As ground water seeps around your pool it will be diverted to the deep end under you pool. When your swimming pool specialist comes to service you pool, he can drain the water from under the vinyl liner.
Spray painted line is the elevation for the stone so the pool bottom can get poured to the correct depth.
This tried and proven sump system should be put in every time you have high ground water when digging your pool or if you have clay soils. If your swimming pool builder isn’t putting this in, chances are he isn’t a specialist you want to work with. Don’t let any Bob & Joe build your pool.
Have a floating liner and need it fixed after the fact? If you have main drains in your pool, there is a way to help your floating liner situation. This solution isn’t ideal, but it gives you a way to handle your high water table and fix a floating liner.
If you are worried about not having good circulation, you can install Infusion returns to get better circulation and heated water.
Here is an example of high ground water with clay in Muskego, WI with pure clay. Notice how the ramp also gets washed rock, that way any water that gets to the ramp will drain to the bottom, sump system, where it can be sucked out. To date, this liner has yet to float due to a high water table.
W226 N781 Eastmound Drive
Waukesha, WI 53186
3300 County Road 10
Minneapolis, MN 55429