Why Do Concrete Pools Crack?

Clear Blue Water

For many people, a concrete pool is an exciting investment that provides fun for the whole family, but not all pools are created equal.

Concrete pools can crack for several reasons and it’s important that you know the reasons why. Several of these are the direct result of human error, so it’s always important that you get experienced pool contractors to help with your pool installation.

Why do cracks appear in concrete swimming pools?

1. Improper soil

The soil in our country is not always fit for a pool – if yours is (or was) constructed in poor soil, then it might only be a matter of time before a leak develops. Dry soil will expand when exposed to water either from the rain or the pool itself, and this expansion can put a lot of pressure (up to 500 kilopascals) upon the frame of the pool and lead to significant cracking.

2. Location

On a similar note to the above, the location you choose to place your pool could lead to soil issues. If you were to build your pool on the side of a hill (it’s more common than you think), you would be at risk of soil movement. This phenomenon (dubbed ‘slope creep’) will not only put stress on the pool frame, but soil that shifts downhill could expose the foundations of your pool and wreak untold havoc, all of which can lead to a deep crack.

3. Concrete mixing

When mixing concrete, getting the ratios right is vital. If your concrete is mixed with too much water, it will be too weak to create a sustainable shape in the long term. Conversely, if it doesn’t have enough water, the dry mixture will similarly be difficult to work with. The concrete will also need at least 14 days of curing – any less and the dry plaster will inevitably crack.

4. Poor workmanship

As you might be able to guess, many of the aforementioned causes can be traced back to improper installation or execution of the pool design. Whether that is not assessing the location, the soil or just making a normal human error when mixing the concrete, there is always the chance of it going wrong and leaving you at risk of a cracked pool. This makes it vital to choose the right company that will do its due diligence before installing a pool.

5. Ground movement

Ground movement can sometimes put added tension and pressure on your pool, so to relieve these stresses, the concrete cracks. Insufficient soil compaction during the installation process can also lead to soil movement, causing similar results.

Generally speaking, a crack in your pool is completely avoidable.

At Ideal Pools, we have successfully installed over 7,000 pools across the Gold Coast in the past three decades. This means we know how to construct a pool and our experienced team will build your pool well.

Would you like to learn more about concrete pools? Read our latest article, if you are interested in knowing how long does a concrete pool last?

If you need a company to help create your dream pool without fuss, give us a message and we will get to work helping you.