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There’s Water Behind My Pool Liner — What Do I Do?!

Have you noticed an accumulation of water behind your pool liner? This is a common problem for many above ground pool owners and can cause both short-term and long-term issues that need to be addressed. The swimming pool experts at LinerWorld are here to explain how you can identify and prevent problems before they get worse.

What happens when water gets behind my pool liner?

One of the most common issues associated with water collection behind a pool liner is known as a “floating” or “lifting” liner. The water causes the liner to lose its original seal, which then can cause soft spots, wrinkles, and other imperfections that lead to a lifted, floating liner. In most cases, this floating pool liner will be the physical indicator of what’s going on behind the scenes.

Now the question is whether you should repair or replace your pool liner. Depending on the age and quality of your liner, sometimes it can be saved if properly addressed. In other cases, the stress and pressure of the displacement may require you to invest in another liner. It is important to carefully inspect your liner for rips, tears, or weak spots before refitting.

How does water get behind my pool liner?

There are many different ways for water to come between your swimming pool and swimming pool liner. Typically, it is not the fault of the installation process but rather the fault of Mother Nature. Identifying the cause of the issue can help stop and prevent future problems. Below are some of the more common causes:

    • Metal Wall Oxidization: Oftentimes, vinyl liner pool structures are made with galvanized steel panels which are a strong, but potentially leaky option long-term. Because the metal walls are underground, they can oxidize over time and be damaged by pool or groundwater. This can cause leaks that allow water to enter between the liner and walls.
    • Water Depth Issues: When pool water depth is too low (such as during winter months) or the water table levels too high (such as after heavy rainstorms), the differing amounts of pressure can allow water to enter.
    • Liner Hole or Leak: If there is a significant amount of water behind your pool liner in one or more areas, it’s possible the liner itself has a leak. If the leaking water does not have anywhere to drain, it can remain collected between the liner and pool walls or foundation, creating the appearance of a floating liner.

How can I fix the issue?

Depending on the severity of the situation, there are different steps you can take to help:

    • Hire a professional to remove the water and check, reposition, or replace the liner properly
    • Ensure the pool water level is maintained at the correct height
    • Unblock or replace the pool’s vacuum pipe
    • Install an additional vacuum pipe
    • Avoid draining the pool unless absolutely necessary, as this can create structural issues
    • If the liner is the issue, consider investing in a new liner to avoid future headaches

If you have water behind your pool liner and it looks like a new liner might be the next step, LinerWorld offers a wide variety of bold and colorful pool liners to meet your needs. 

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