How do you choose the right pool structure for your project?

A pool structure is rarely visible when the pool is finished, but it determines how the project will perform for many years to come. The question how do you choose a pool structure 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 structure provides a secure foundation for swimming, heating, and pool cover. The wrong choice can make the building process more complicated and operation more expensive than necessary.

How do you choose a pool structure based on the plot?

Start with the location where the pool will be placed. A flat, easily accessible plot offers more possibilities, while rock, a slope, high groundwater, or narrow access routes place greater demands on planning and groundworks. A pool can be built on most plots, but the choice of structure 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 significant weight, and a stable base is essential to avoid settlement. Drainage, load-bearing layer, base slab and any handling of groundwater are therefore part of the whole - not optional extras that can be sorted out later.

A custom-made PP pool can be particularly interesting when the plot or your wishes call for a specific shape, steps, or seating area. A fibreglass pool is often a good choice when you want a preformed basin with efficient installation and a high-quality surface finish. The Thermopool is a flexible choice for many Swedish gardens, especially when the pool’s 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 transportable to the excavation. If lifting by crane, driveway 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 structures 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 pre-welded structure. The material provides a smooth, pleasant surface, and the pool can be designed with, for example, a wide staircase, sun shelf, bench, or integrated seating area. This makes the PP pool a strong option for anyone who wants to create a well-considered pool environment with high comfort.

The dense, smooth surface is easy to keep clean and has few seams where dirt can collect. PP is also a material that performs well in the humid pool environment and does not require liner replacement. For many homeowners, the combination of custom shape, easy maintenance, and an exclusive look is a clear advantage.

At the same time, transport and installation need to be planned carefully. The structure arrives complete, which streamlines the on-site assembly but places demands on access. A PP pool is often an investment for those who prioritise a specific design and want the stairs, depth, and features to be right from the start.

Thermopool - flexible, insulating, and adaptable

A thermopool is built using insulating blocks that are filled with concrete and then finished with 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. The Thermopool can be built in many sizes and shapes, making it suitable for both classic rectangular family pools and solutions with more specific dimensions. Because the structure is built on site, it is also practical when the transport route is narrow or the plot is difficult to access with large lifts.

However, it is important to consider the entire construction. Concrete work, reinforcement, base slab, pipework, and liner installation need to be carried out with care. A Thermopool has excellent conditions 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 fibreglass pool is a prefabricated basin with a finished surface, often with an integrated staircase and a clear design. For those who want to shorten build time and choose a proven model, it is an attractive option. The basin is placed in the prepared excavation and then connected to the equipment, backfill, and pool environment.

The surface is smooth, easy to maintain, and pleasant to swim in. The finished design also means you know from the outset what the pool’s shape and function will be. Fibreglass pools are well suited to homeowners who want an efficient installation without compromising 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 there is less ability to change the length, width, or stair placement than with a custom-made PP pool or a Thermopool. As with the PP pool, delivery to the plot needs to be planned.

Choose the structure based on how the pool will be used

A pool for a family with children does not necessarily need the same structure and design as a pool for exercise, relaxation, or social evenings on the patio. Think about how you will use it before settling on a particular material.

If you want to play, socialise, and swim for 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 basin may be more relevant. If the pool is mainly meant to be a place for recovery, a compact mini pool or wellness pool with seating may be a more accurate choice than a larger traditional pool.

Depth should also be chosen thoughtfully. Deeper water gives a different swimming experience, but it means a larger water volume and therefore higher demands on heating and maintenance. A well-considered depth, the right staircase, and a structure 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 structure

The lowest purchase price is rarely the best basis for a decision. The pool’s total cost includes groundworks, foundation, structure, surface finish, equipment, installation, heating, lighting, cover, and future maintenance. The difference between two structures can be smaller or larger once the entire project is calculated.

An insulating structure, for example, can help reduce heat loss, but the quality of the pool cover and how often the pool is covered also have a major impact on energy costs. A ready-made structure can shorten installation time, but may require crane lifting and a good transport route. A site-built pool may be easier to get onto the plot, but it involves more work stages during the build.

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. That does not have to be an argument against a liner - a high-quality liner is an established and appreciated solution - but the cost and timing should be included in the calculation from the start.

Let the pool enclosure and technology influence your choice

The pool structure never works alone. For a Swedish pool project, it needs to work together with circulation, water treatment, heat pump, and pool cover. A high-quality pool enclosure retains 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 you choose the structure. Pipework, inlets, overflow, lighting, and any counter-current system should be integrated correctly. Adding functions late in the process can limit your options or increase the cost.

For many people, the most cost-effective choice is a pool solution where structure, equipment, and cover are designed as a whole. Then it becomes 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 site, it may work to coordinate the groundworks contractor, electrician, pool installer, and suppliers yourself. However, in a pool project, the division of responsibility can quickly become unclear if several parties work separately. This is especially true for complicated ground conditions, custom-designed pools, or when the pool enclosure and outdoor environment are to be completed at the same time.

With a complete solution, you get better conditions for matching the right pool structure with the right installation and service. Pooltime can help from selecting the pool model and preparing the ground to a finished pool environment, with solutions adapted to Swedish conditions and the family’s way of living.

The best choice of structure is the one that feels just as well considered after ten swim seasons as it did on the day the pool was 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 becomes both safer and easier.