How to Fix a Floating Pool Liner
A floating pool liner can be a frustrating problem for pool owners to deal with. Not only can it make your pool look unsightly, but it can also cause further damage to your pool if left unaddressed.
Fortunately, there are several steps you can take to fix a floating pool liner. In this blog, we’ll go over the causes of a floating pool liner and outline how to fix the problem.
What Is a Floating Pool Liner?
A floating pool liner is when your vinyl liner detaches from the pool floor or walls and starts to lift or bubble up. Instead of being snug against the pool walls, the liner appears to “float” or ripple, especially when looking at the bottom of the pool.
While alarming, this is a relatively common pool liner issue, especially if you live in an area with high water tables or there’s been storms and heavy rainfalls.
Why Is My Pool Liner Floating?
There can be several reasons why your pool liner is floating. Here are some of the most common causes.
Groundwater
Groundwater is water that seeps into the ground and can accumulate in the soil. When there’s a lot of water in the soil around and under your pool, the pressure can build up and push the liner upward, making it bubble or float. If you live in an area with a high groundwater table or other water-related issues, this is especially common.
Age & Wear
Over time, pool liners can become worn and less elastic. This can cause them to stretch and become loose, which can lead to the liner floating.
Poor Installation
If the pool liner was not installed correctly, it could cause the liner to float. This can happen if the liner was not properly secured to the pool walls or if there are wrinkles or air pockets under the liner.
Poor Drainage Around the Pool
If your yard or area around the pool doesn’t drain well, water will collect around the base of your pool. Without a proper drainage system in place, that water will start to seep under the pool and lift your liner. Sudden influxes of water — like storms and rain — can trigger these drainage issues and cause further problems.
Leaks or Cracks
If your liner has a leak or there are cracks and gaps around the base of your pool, water can start to get under the pool liner. When that happens, you may notice floating. Depending on the issue, you may be able to use a liner patch kit to repair the hole or leak in the liner.
How to Fix a Floating Pool Liner
Fixing a floating pool liner takes patience, care, and, ideally, dry weather. It can be a challenging task, but here are the general steps to follow to fix a floating pool liner in the short-term.
Do NOT drain your pool entirely, as doing so can make the liner float worse or collapse your pool walls.
Assess the Problem
Look to see where the pool liner is floating. Center? Edges? The whole floor? You can gently push on it with a pool brush or broom to check for water underneath the liner.
Lower the Water Level Slightly
If possible, reduce the water level to just below the floating section or bubble and adjust. Don’t overdrian to avoid shifting, wrinkling, or collapse.
Use a Sump Pump
If you know where the liner is floating due to trapped water, you can use a sump pump to pump the groundwater away from the area surrounding the pool. Don’t drill or puncture your liner unless you are working with a pro.
Reposition the Liner
If you’re able to relieve the pressure under the liner, you can smooth it back into place using a soft pool brush or walking gently with your feet.
Refill the Pool
Once it’s all set, slowly refill the pool. You’ll want to smooth out wrinkles and monitor for shifting as you go.
Work With a Pool Pro
If you’re going to have to fully drain your pool to fix the issue, the walls are bowing or collapsing, or you’re unable to identify the cause of the floating, it’s best to work with a pool professional. They’re experienced and can help you avoid damaging your pool structure or liner more than it already is.
Address Long-Term Prevention
While the quick fixes to get you back up and running are great, many of the root causes of floating pool liners stem from significant issues. If not addressed, you’ll likely have the same floating issue happen again or with a new replacement liner. Here are a few long-term things to consider:
- Improve site grading and ensure the ground slopes away from the pool for better draining
- Install a draining system or sump pit to help continuously remove water from around the pool area
LinerWorld Has All the Must-Have Pool Accessories
Any type of pool liner repair may cause the liner to develop other problems. Tears, rips, or pool liner failures may be the result of attempting this kind of swimming pool repair.
If fixing your floating pool liner doesn’t go as planned, don’t worry! LinerWorld is your one-stop-shop for bold, colorful liners, pool liner installation accessories, pumps, and much more for your above ground pool.
Updated April 24, 2025
