Wrinkles in your vinyl pool liner can be caused from many things. Improper liner installation, improper tailoring of the liner, pool liner floating and shifting, low ph, excessive high levels of chlorine shock and absense of stabilizer and conditioner in your pool water. If the liner is not installed squarly to the proper shape of your pool, your liner will be wrinkled. If your pool liner is not ordered tailored to your pool, then the liner will be wrinkled.
If your pool liner is leaking and gets water underneath or if you have excessive rain water that floats your liner, you could end up with wrinkles. This is caused from the pressure inside your pool and behind your pool liner being equalized. This causes floating and shifting. Once a liner has shifted and then goes back down into place, you will end up with wrinkles in you vinyl pool liner. The best way to prevent wrinkles is to prevent your liner from floating.
The best way to prevent your vinyl liner from floating is to install a sump well or sump pit. It is a pit that is about 5’ deep and sits close to the edge of your pool. This pit collects the water from around your pool and then the sump pump, evacuates the water away to the sewer or low lying area if you are outside Winnipeg. Any chemical imbalance of the pool water can cause wrinkles, have your pool water tested professionally, often.