Want to enjoy a cocktail while marvelling at the breathtaking panoramic view? The overflow pool is for you! We’ll show you the essentials for turning your garden into a refreshing oasis.

What Is An Infinity Pool, And Why Build One?

An infinity pool is an in-ground pool. The water overflows from the main pool into a gutter. Depending on the pool’s surroundings, the overflow can be on the width, length, or several sides.

In contrast to a conventional pool, an overflow pool has no skimmers. The water overflows from the first pool into the balancing tank – or secondary tank, to be filtered. The system works in a closed circuit: the filtered water returns to the main pool. Therefore, the pool is easier to maintain because the water flows continuously, unlike a conventional pool with stagnant water. The water movement carries insects, fallen leaves, and other waste to the overflow and away.

Régulation du bac tampon pour parfait fonctionnement piscine à débordement

The balancing tank regulates the volume of water in the pool when several swimmers occupy it or when the heat evaporates the water. It can also collect rainwater and various waste products.


The essential equipment of an overflow pool is:

  • A compensation tank of a few hundred gallons, i.e., a few cubic meters.
  • A pump that ensures a constant flow so that the overflow is maintained, and the water is well filtered;
  • A solenoid valve for automatic filling of the pool in case of need (water loss by evaporation, leakage, etc.);
  • Level probes used to test the water level, to control the volume in the main pool and to control the operation of the pump;
  • A check valve allows good circulation of the water in a single, circular direction.

In addition to the practical aspect of the overflow pool, there is also the aesthetic aspect. This piece of water will embellish your outdoor environment. Plant compositions can transform this place into a true oasis of relaxation.

What Is The Ideal surroundings?

There is the negative edge pool version, which gives the impression of water overflowing, thus cascading. It is the most common vision we have of the infinity pool.

A sloping site is ideal for building an infinity swimming pool. Ideally, there should be a panoramic view, open to the horizon, so that you can enjoy a magnificent view while swimming. While the view is important, the nature of the ground is essential. We will come back to this point below.

However, it is also possible to create this type of pool on flat ground. It is more often a zero-edge pool. The water level is then at the same level as the terrace and offers the effect of a lake in your garden, reflecting the surrounding landscape. Poetic!

Before starting any investment, the owner must consult a pool designer to discuss the planned project. The designer will determine whether the pool’s environment is suitable for the project and will be able to propose a swimming pool plan at the end of this discussion. The owner can then contact a pool designer or craftsman to get a quote. They can determine together the best time to start the work.

Morana's advice 👇

A tailor made infinity swimming pool

Architects and pool builders can design and build this type of pool, but if you want more control and want to save money, you’re probably better off working with a pool designer and construction company.

Affordably build a pool

Despite infinity pools being technically complex, non-specialized companies can build your dream pool at a reasonable price.


Seek professional support for your pool project.

When Is The Best Time To Start Work On Your Pool?

The time frame for building a swimming pool varies according to the project, the surroundings and any challenges encountered during the construction. On the whole, the construction of a swimming pool takes six months. The pool builder or craftsman will prefer to adapt to the seasons to create a masterpiece for you.

The autumn is the ideal time to start building a swimming pool, especially the structural work. After summer, the water table is low, and the ground is softer and therefore easier to work. For a concrete pool, the main works can be done without fear of frost.

In winter, the annex constructions can be built: pool house, pump room finishing, etc. We can also fit the filtration system.

If you have opted for a liner, your pool specialist may prefer to install it in the spring, as this coating is sensitive to low and high temperatures: the liner shrinks and expands.

What Are The Things To Consider Before You Start Building Your Pool?

Cost of your dream pool

Of course, the price will vary depending on the size of the pool. The pool price will also vary depending on the type of overflow you choose and the accessories you wish to include. The more elaborate the pool design, the higher the cost is likely to be. Nevertheless, aesthetics is primordial in the creation of your oasis pool. The constraints of the environment can also influence the price.

Compared to a conventional pool:

  • A zero-edge pool will cost on average 20 to 30% more;
  • A negative edge pool will cost on average 15 to 25% more.

The soil nature

The perfect soil for building a pool is limestone. Conversely, in the case of clayey soil, damage to the pool may occur over time. There are, therefore, precautions to be taken.

It is therefore essential to contact a swimming pool architect and then a swimming pool specialist. They will call on a soil engineer or a concrete engineer to study the nature of the soil and the environment.

Depending on the country, the owner has to fulfil specific requirements before starting the work.

What Are The Steps Involved In Building A Swimming Pool?

Firstly, a pool designer must draw up a plan. With him, you can work out the details of the project, including discussing pool design concepts.

Make sure that your pool builder has already built overflow pools. Ask to see their previous work. You can’t afford any deviations in the construction of your pool. It must be perfect. Everyone has to know the constraints of the ground, and practical solutions must be ready to be deployed.

The construction itself is pretty similar to that of conventional pools:

  • Digging the shape of the future pool;
  • Installation or construction of the pool, including the balancing tank and the pump room;
  • Installation of the filtration system and connection of the networks.

It is important to follow the construction site closely, every detail matters.


Infinity pools, and deck level pools are an asset to any property. A swimming pool designer will be able to take advantage of the building site to suggest ways of enhancing it. These professionals can propose innovative ways to enhance the pool area. These include incorporating unique features, optimizing the layout for functionality and aesthetics, and ensuring that the pool seamlessly integrates with the overall design of the property. 

It is important to remember that a pool with an overflow edge also means a more efficient and healthier way of operating the water.