Wrinkle Woes: 7+ Things Causing Inground Pool Liner Issues

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Emptied pool showing wrinkles alone the vertical walls


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If you’ve noticed wrinkles in the liner of your inground pool, you’re not alone. Wrinkles in pool liners are a common concern among pool owners, and they can be caused by a variety of factors.

In this blog post, we’ll break down some of the most common causes of inground pool liner wrinkles and offer some tips for preventing and fixing them.

Whether you’re a seasoned pool owner or a new one, understanding the reasons behind these unsightly wrinkles can help prolong the life of your pool and keep it looking its best.

So, if you’re ready to dive in, let’s explore what causes inground pool liner wrinkles.

Emptied pool showing wrinkles alone the vertical walls

1. Improper installation

Improper installation can cause wrinkles in an inground pool liner. If the liner is not properly secured or positioned during installation, it can shift or stretch, leading to unsightly wrinkles.

Additionally, if the liner is too large or too small for the pool, it will not fit properly and wrinkles may form.

This is why it is crucial to hire a professional to install a pool liner, as they have the expertise and tools necessary to ensure it is done correctly.

Without a proper installation, other factors such as poor water chemistry balance, ground movement, or debris in the pool can exacerbate the problem and lead to even more wrinkles.

Remember, investing in a properly installed liner will ultimately save you time and money in the long run.

2. Ground movement

Another cause of inground pool liner wrinkling is ground movement. This can occur due to shifts in soil, especially during periods of heavy rainfall or earthquakes.

Ground movement can lead to the pool’s foundation being unstable, causing the liner to wrinkle or pull away from the walls.

It can also cause the pool to sink, which puts additional weight and pressure on the liner.

To prevent this, it’s important to ensure that the pool’s foundation is solid before installation and to monitor its condition regularly.

In addition, proper drainage systems should be installed to prevent water from pooling around the pool and causing soil erosion.

By addressing any ground movement issues promptly, you can help prolong the life of your inground pool liner.

3. Age and wear

The age and wear of the pool liner are other causes of wrinkling. As time goes by, the liner can become brittle and lose its elasticity, making it more susceptible to wrinkling.

Additionally, excessive usage of the pool can cause the liner to wear out faster. Regular maintenance and proper water chemistry balance can slow down the aging process.

However, if the liner is already past its prime, it may be time for a replacement. Choosing a high-quality liner and ensuring proper installation can also help prolong its lifespan.

By taking proper care of the pool liner, wrinkles due to age and wear can be minimized.

4. Poor water chemistry balance

One of the most common causes of wrinkles in inground pool liners is poor water chemistry balance.

As noted in the previous section, high chlorine levels or low pH can damage the vinyl material, causing it to wrinkle over time.

This is why it’s important to regularly test and balance your pool’s water chemistry, adjusting levels as needed to keep it in the recommended range.

Neglecting water chemistry can also lead to other pool issues, such as algae growth or equipment damage.

Don’t let poor water balance ruin your pool liner – stay on top of maintenance to ensure it stays smooth and strong for years to come.

5. Drainage problems

Drainage problems can often contribute to the wrinkling of an inground pool liner.

If the surrounding soil around the pool is not properly graded or does not have adequate drainage, then excessive water accumulation can occur.

This, in turn, can cause the soil to shift and settle, resulting in uneven pressure on the pool liner, which can lead to wrinkles.

It’s essential to ensure that proper drainage is established during the installation process to prevent this from happening.

In addition, routine maintenance to keep gutters and downspouts clear of debris will also aid in preventing drainage issues that can damage your pool liner.

By addressing these factors, homeowners can take the necessary steps to prolong the lifespan of their pool liners.

6. Sharp objects or debris in the pool

One of the common reasons for wrinkles in an inground pool liner is the presence of sharp objects or debris in the pool.

Objects such as toys, tree branches, and even animals can cause damage to the liner by puncturing or tearing it.

It is important to keep the pool area free of objects that could cause damage to the liner.

Additionally, regular cleaning and maintenance of the pool can help prevent debris from accumulating and causing damage.

Proper pool maintenance can also help prevent the buildup of algae and other contaminants that could require excessive use of chemicals, which can also damage the liner.

By being careful about keeping sharp objects and debris away from the pool, and practicing proper maintenance, pool owners can keep their liners looking smooth and wrinkle-free for years to come.

7. Extreme temperature fluctuations

Extreme temperature fluctuations can also be a significant cause of inground pool liner wrinkles.

Vinyl liners in pools are often prone to wrinkles in colder temperatures, as the colder water causes the liner to harden, which leads to wrinkling.

Additionally, consistently high chlorine levels or very low pH levels can cause premature wrinkling of pool liners.

In colder climates, pool liners that suffer through winters will harden, causing damage and wrinkles. If you let your pool heat up before use, it can prevent wrinkles from forming in the liner.

However, when the temperature rises too high, the liner can expand and cause wrinkles, emphasizing the need for proper temperature control.

Hence, maintain the right temperature and balance the water chemistry to prevent wrinkles in the liner.

8. Excessive weight or pressure on the liner

Excessive weight or pressure on the liner can also cause wrinkles in the pool liner.

This can happen if heavy objects are left on the liner for an extended period of time, or if too many people are frequently swimming or diving in the same area of the pool.

It’s essential to make sure you don’t exceed the manufacturer’s recommended maximum weight limit for your pool liner.

Additionally, it’s important to teach children not to jump into the pool from the poolside or any objects which can damage the liner.

Always ensure that everything inside your pool is safe for your liner. By following these guidelines, you can prevent excessive weight from causing wrinkles in your liner and sparing yourself the headache of dealing with it.

9. Poor quality liners

Another reason for wrinkles in an inground pool liner is poor quality material. A poorly-made liner may have structural weaknesses that make it more prone to wrinkling or tearing.

This can be compounded by other factors, such as improper installation or harsh chemicals.

Homeowners should do research before purchasing a liner to ensure that they are investing in a high-quality product.

Cheaper options may seem like a good deal at first, but they may end up costing more in the long run if they don’t hold up under regular use.

In the end, it’s worth it to invest in a quality liner that will resist wrinkles and last for years to come.

How Can Running a Pool Robot More Often Help Prevent Inground Pool Liner Issues?

Running a pool robot more often can significantly prevent inground pool liner issues. Regular usage allows the robot to thoroughly clean debris, dirt, and algae, reducing strain on the liner. Additionally, pool robot maintenance tips such as cleaning the filter and checking for any damages ensure its optimal performance, further safeguarding the pool liner.

10. Lack of maintenance

Neglecting to properly maintain your pool can lead to a multitude of problems, including wrinkling of the liner.

Failing to clean the pool regularly and properly balance the water chemistry is a major contributing factor to this issue.

Dirt and debris can accumulate on the liner causing it to stretch and shift over time.

Additionally, unbalanced water chemistry can cause the vinyl to lose its elasticity, making it more susceptible to wrinkles.

Regularly inspecting the pool and addressing any issues promptly can prevent small problems from turning into larger ones.

Don’t forget to also properly winterize the pool to prevent damage during colder months. A little bit of maintenance can go a long way in ensuring the longevity of your pool liner.

– What Are Some Solutions for Inground Pool Liner Issues Caused by Water Loss?

Inground pool water loss causes may include leaks, tears, or damage to the liner. Solutions for these issues often involve patching or repairing the liner, adjusting the water level, and regularly inspecting for any signs of damage. Promptly addressing water loss can help prevent further issues and maintain the pool’s integrity.


In conclusion, there are numerous factors that can cause an inground pool liner to wrinkle.

As discussed, improper installation, ground movement, age and wear, poor water chemistry balance, drainage problems, sharp objects or debris in the pool, extreme temperature fluctuations, excessive weight or pressure on the liner, poor quality liners, and lack of maintenance are all potential culprits.

It’s important to address any of these issues promptly to prevent further damage to the liner and ensure the longevity of your pool.

Regular maintenance and a proper chemical balance can go a long way in preventing wrinkling and other issues.

By taking proper care of your pool and addressing any issues as soon as they arise, you can enjoy a smooth and pristine pool for years to come.