Pools provide endless hours of backyard recreation. A cooling oasis on a hot summer day, pools also serve as a relaxing place to simply float. Pools can endure for years, but they require routine upkeep. The liner of a pool may deteriorate over time, and homeowners will need to be on the lookout for signs a liner is no longer secure.

The life expectancy of a pool liner varies based on a range of variables. According to Leisure Industries, an above-ground pool liner can last from six to 10 years, while an in-ground liner can last from 10 to 20 years. Maintaining the pH level of the water and overall water chemistry can help a liner endure, as can having a liner that’s a proper fit for the dimensions of the pool.

The following are some signs a liner has seen its last pool party.

Cracks, tears or holes: Obvious deterioration in the pool liner is a sign it will need to be changed. Holes or cracks in the liner can eventually lead to leaks.

Fading colors: UV damage and poor water chemistry can leach the color right out of the liner, leaving it pale and unsightly. If you notice the color of the pool liner has faded dramatically, you’ll likely want to replace it.

Unexplained water loss: If you constantly have to add water to the pool to maintain the proper level, it’s likely losing water through a hidden tear or fading seal. Small punctures can be patched, but multiple leaks indicate a liner has lost its integrity.

Sagging or stretched appearance: A loose, sagging liner is unattractive and can be susceptible to tearing. As vinyl ages, it shrinks and loses its elasticity. This tends to occur once the liner passes the 10-year mark, say pool experts.