When you start adding water to the pool, it’s common to want to make sure it does not impact its structural integrity.
This can happen depending on what time you fill the pool and how the liner is set up.
You will worry about the pool wall buckling while filling and will want to figure out what is going on.
If the pool wall is buckling while filling, this means the liner is too tight, the support under the wall is weak, or the pool was filled at night causing the liner to tighten. It’s best to wait until the sun comes up to see if the liner loosens. If not, change the liner and the wall will get better.
In some cases, the buckling can cause additional damage to the swimming pool wall. This is when you are going to want to get a professional to come and take a look at the wall.
They will use specialized materials to fix the walls.
This article is going to take a look at what to do when the pool wall is buckling while filling.
Table of Contents
Tips When The Pool Wall Is Buckling While Filling
1. Check The Liner’s Fitting
To fix a bent pool wall, you have to start with the liner.
It is the liner that tends to be the wrong size.
You are not going to notice this until there is water in the pool, which is when the buckling begins. This is going to worsen depending on how tight the pool liner is.
In a situation such as this, you are going to want to take the time to look at the swimming pool’s liner and see how the fitting is.
If it does appear to be too tight then this is the issue you are likely facing.
Until the liner is changed or loosened, it is not going to prevent this type of buckling.

2. Check The Support
If the above ground pool sides are caving in while filling, this means the support might not be in good shape.
The support under the pool has to be stable.
If it is not sitting on the right type of surface or the surface has lost its hardness, this is going to cause it to buckle.
You will want to immediately stop filling the pool with water as it is going to ruin the swimming pool’s wall.
It is important to figure out what is going on underneath the swimming pool as soon as this happens. Always make sure to nip these problems in the bud before they ruin the pool to the point of no return.
3. Don’t Fill The Pool When The Sun Is Down
You should take the time to fill the pool when the sun is down.
Do not create a situation where the swimming pool is not full as that is going to ruin it. You will want to make sure to give the liner enough time to breathe.
This is one of the main issues pool owners have when they are filling a pool.
They will not time it right.
You should be aiming to do it when the sun is at its peak to make sure the liner stays warm. This is going to ensure it remains loose as you are filling the pool.
Keep this in mind when you are going through the process and do not take a risk when it comes to how you are filling the swimming pool.

4. Let The Liner Sit In The Sun To See If It Responds
You will want to make sure to let the liner sit in the sun to see if it responds.
Why does this matter?
Sometimes, the only change you are going to have to make is to stop filling the pool with water until a few hours later.
After the sun comes up, the temperature is going to rise, which will cause the liner to loosen. This is what you will want to wait for when fixing the swimming pool wall.
As soon as you begin waiting, the pool liner is going to settle and it is going to loosen to the point the bucking will stop.
Final Thoughts
Look at these tips to fix a pool wall that’s buckling while filling.
If the pool wall is buckling while filling, this is due to the liner being too tight or the support under the wall being unstable. To fix the issue, change the liner or wait until it gets warmer to continue filling the pool. This will allow the liner to loosen. If the support is weak, it is best to find out what’s the cause under the pool.
It is important to go through these steps and stop filling the pool until you are certain about what the problem is.
A lot of people don’t do this and that is when they see subpar results with the pool.