A pool shell is rarely visible once the pool is finished, but it determines how the project performs for many years to come. The question how do you choose a pool shell therefore concerns not only shape and price, but also ground conditions, installation, insulation, maintenance, and how the family wants to use the pool. The right shell provides a secure foundation for swimming, heating, and pool covers. The wrong choice can make the construction process more complicated and operation more expensive than necessary.
How do you choose a pool shell based on the plot?
Start with the location where the pool will be installed. A level, easily accessible plot offers more possibilities, while bedrock, a slope, high groundwater, or narrow access routes place greater demands on planning and groundwork. It is possible to build a pool on most plots, but the choice of shell needs to be adapted to the conditions before the order is placed.
The ground must support the pool evenly, even when it is filled with water. A pool contains great weight, and a stable base is crucial to avoid settlement. Drainage, sub-base, base slab and any groundwater management are therefore part of the overall solution - not optional extras that can be dealt with afterwards.
A custom-made PP pool can be particularly interesting when the plot or your preferences require a specific shape, staircase, or seating area. A fiberglass pool is often well suited when you want a preformed pool with efficient installation and good surface quality. The thermopool is a flexible choice for many Swedish gardens, especially when the pool dimensions need to be adapted to the site and the project is built in stages.
Accessibility is also practical. A prefabricated glasfiberpool or PP pool needs to be able to be transported to the excavation. If lifting by crane, access, or passage through the garden is limited, a frame built on site may be a better solution. Here, it is wise to assess the entire logistics early on, not just the pool's location.
Three common pool shells and their strengths
PP pool - for design, comfort, and long-term use
A PP pool is made of polypropylene and is usually delivered as a fully welded shell. The material provides a smooth and pleasant surface, and the pool can be designed with, for example, a wide staircase, sun deck, bench, or integrated seating area. This makes the PP pool a strong option for those who want to create a well-thought-out pool environment with a high level of comfort.
The dense, smooth surface is easy to keep clean and has few joints where dirt can collect. PP is also a material that performs well in a humid pool environment and does not require liner replacement. For many homeowners, the combination of a custom shape, easy maintenance, and an exclusive appearance is a clear advantage.
At the same time, transport and installation need to be planned carefully. The shell arrives ready-made, which streamlines the actual on-site assembly but places demands on access. A PP pool is often an investment for those who prioritize a specific design and want the staircase, depth, and features to be right from the start.
Thermopool - flexible, insulating, and adaptable
A thermopool is built with insulating blocks that are filled with concrete and then given a pool-adapted surface layer, usually a liner. The construction provides good insulation and can help reduce energy consumption, especially when combined with a well-suited pool enclosure or slatted cover.
Its greatest strength is flexibility. A thermopool can be built in many sizes and shapes, making it suitable for both classic rectangular family pools and solutions with more specific dimensions. Since the shell is built on site, it is also practical when the transport route is narrow or the plot is difficult to reach with large lifts.
However, it is important to consider the entire structure. Concrete work, reinforcement, base slab, pipe installation, and liner installation must be carried out carefully. A thermopool has good potential to become a very durable pool, but the result is clearly affected by planning and installation.
glasfiberpool - a quick route to a finished pool
A fiberglass pool is a prefabricated pool with a finished surface, often with an integrated staircase and distinct design. For those who want to shorten the construction time and choose a proven model, it is an attractive option. The pool is placed in the prepared excavation and then connected to the technical systems, backfilling, and pool environment.
The surface is smooth, easy to maintain, and pleasant to swim in. The finished design also means that you know from the outset what the pool's shape and function will look like. Fiberglass pools are well suited to homeowners who want efficient installation without compromising on the feel of a permanent, in-ground pool.
The limitation is that the selection is governed by existing models and dimensions. You can choose a pool that suits your plot and style, but the ability to change the length, width, or staircase placement is more limited than with a custom-made PP pool or a thermopool. Just as with the PP pool, delivery to the plot needs to be planned.
Choose the shell based on how the pool will be used
A pool for a family with children does not necessarily need the same shell and design as a pool for exercise, relaxation, or social evenings on the patio. Therefore, think about how it will be used before getting attached to a certain material.
If you want to play, socialize, and swim during much of the summer, a generous staircase, a shallower zone, and easy access are often more important than maximum length. For lap swimming, a long, straight pool may be more relevant. If the pool is mainly intended as a place for recovery, a compact mini pool or wellness pool with seating may be a more suitable choice than a larger traditional pool.
The depth should also be chosen carefully. Deeper water provides a different swimming experience, but also means a larger water volume and therefore greater demands on heating and maintenance. A well-considered depth, the right staircase, and a shell that supports the family's everyday life often provide more value than a pool with more features than you actually use.
Calculate the total cost, not just the pool shell
The lowest purchase price is rarely the best basis for a decision. The total cost of a pool includes groundwork, foundations, shell, surface finish, technical systems, installation, heating, lighting, covers, and future maintenance. The difference between two shells may be smaller or greater when the entire project is calculated.
An insulating shell can, for example, help reduce heat loss, but the quality of the pool enclosure and how often the pool is covered also have a major impact on energy costs. A ready-made shell can shorten installation time, but may require crane lifting and good transport access. A site-built pool may be easier to get onto the plot, but involves more work steps during the construction period.
Also think about long-term maintenance. A pool with a smooth surface can be easy to clean, while a liner pool may eventually need a new surface layer. That does not have to be an argument against a liner - a quality liner is an established and appreciated solution - but the cost and timing should be included in the budget from the outset.
Let the pool enclosure and technical system influence your choice
The pool shell never works on its own. For a Swedish pool project, it needs to work together with circulation, water treatment, a heat pump, and pool cover. A high-quality pool enclosure retains the heat, protects the water from leaves and dirt, and can significantly extend the swimming season. It also reduces the need for ongoing cleaning.
Plan the equipment room at the same time as the shell is chosen. Pipe runs, inlets, skimmers, lighting, and any counter-current system must be integrated correctly. Adding features late in the process can limit the options or increase costs.
For many people, it is most cost-effective to choose a pool solution where the shell, technical systems, and cover are planned as a whole. This makes it easier to assess energy consumption, installation needs, and how the pool will function in everyday life - from the first spring opening to winter closing.
When should you choose a complete solution?
If you have solid experience with construction projects and a straightforward plot, it may work to coordinate the ground contractor, electrician, pool installer, and suppliers yourself. However, in a pool project, the division of responsibilities can quickly become unclear if several parties are working separately. This is especially true with complex ground conditions, custom pools, or when the pool enclosure and outdoor environment are to be completed at the same time.
With a complete solution, you have better conditions for matching the right pool shell with the right installation and service. Pooltime can help from the choice of pool model and ground preparation to a finished pool environment, with solutions adapted to Swedish conditions and the family's way of living.
The best shell choice is the one that feels just as well thought out after ten swimming seasons as it did on the day the pool is filled for the first time. Start with the plot, the intended use, and the overall budget - then the path to a pool that is truly used will be both safer and easier.
