Swimming pools can be made of various materials, from polyester to polypropylene. The choice is usually limited to a prefab swimming pool. A propylene pool is pre-built as a monoblock and then installed on site by the supplier. In other words, you are always stuck with standard sizes, so your freedom of choice is greatly restricted.
While a polypropylene swimming pool may seem very practical, it also has some definite drawbacks. One of them is the fact that you are dealing with two parties: the builder of the pool and the company that installs it. In the event of problems, it is not always clear who is liable for the warranty.
Furthermore, a propylene swimming pool is not as sturdy and waterproof as a concrete swimming pool. An architectural swimming pool is much more able to withstand the groundwater pressure, and the density of the concrete ensures a pool that is waterproof.