How To Tell When To Replace A Pool Liner

Posted on: 30 November 2016

Pool liners protect your above ground pool's walls from water damage, as they can quickly become corroded or worn due to water exposure. However, over time, pool liners can become worn and damaged, opening the door to severe structural damage to your pool walls, which can be expensive to repair or replace. Understanding what to look for to determine when your pool liner needs to be replaced can help you save money in the long run.

Cracks and Physical Damage

The clearest signs that you need to have your pool liner replaced are cracks and signs of damage or wear to the liner. Even if these cracks seem minor, or appear to be creases, your pool liner needs to be replaced. Sometimes, if the cracks are only in a single area, you can have the liner patched, which is a much cheaper process than having a contractor come in to replace the entire liner.


Pool liners are susceptible to damage from sunlight, which can cause the liner itself to become brittle and crack apart. However, before cracks develop, the liner itself will begin to fade in color. Sometimes, depending on the type and original color of your pool, this can appear like a stain on the liner instead of the bleaching of color. If you notice large patches of discoloration on your pool liner, odds are you will need to replace the entire liner fairly soon.

Wrinkles and Stretching

If your pool liner has developed wrinkles over time, or the top edge of the liner keeps slipping over the edge of the pool wall, the liner itself may be stretching. This happens over time due to general wear and tear, but makes it hard to keep pool liners in position, which opens the door to water slipping in between the liner and pool wall where it can cause damage. If your liner shows signs of stretching, you'll need to get it replaced as soon as possible.

Water Loss

If none of the above symptoms are visible, but you notice that the level of water in your pool is dropping (especially if you can find evidence of water trapped between the liner and pool wall), there are likely small holes and leaks in your liner that are invisible to the eye. If this is the case, you will most likely have to get the liner replaced, as it will prove to be difficult to locate and patch such small leaks.

For more information and assistance with replacing your pool liner, contact pool contractors, such as those at PoolAgain.