How to Build an Underground Pool

Friday, March 30th 2018. | Swimming Pools

If you have finally won the dilemma between underground pool or above ground and you have finally decided to build an underground pool, this page can give you many practical information about the DIY construction of a pool in the garden.

How to build an underground pool DIY

If your garden is very large, an inground pool is what it takes to complete the picture. Making a DIY pool is a difficult feat that only the most tenacious will be able to accomplish.

Generally, we let ourselves be discouraged by the idea of installing a DIY underground swimming pool for economic reasons (it is usual to think that the above ground swimming pools are cheaper than the underground ones) and by design difficulties. In helps arrive the DIY installation kits that make the underground pools more accessible. In fact, to affect a lot on the cost of an underground pool is not so much the form as the coatings are. A high-quality swimming pool liner can make the difference between a cheap underground swimming pool and a very expensive underground pool.

How to build a DIY underground pool: Soil preparation

At design time, carefully choose the location for the pool installation. The swimming pool must be exposed in full sun and sheltered by the wind. The ground destined for the excavation must be flat and not sloping, otherwise you will be doing several extra jobs. The following instructions examine an inground oval-shaped pool, but can also be easily adapted to rectangular pools.

At the moment of the excavation you must take into account the space necessary to realize the perimeter structure of the pool, for each side you have to calculate a surplus of 50 cm. In practice, the excavation will have to be longer than one meter compared to the size of the pool.

The surplus space will serve you to set up the supporting walls. The excavation must also take into account the base slab, which must have a thickness of at least 12 – 15 cm. After realizing the excavation, in fact, it will be necessary to compact the bottom ground and provide for a perfectly smooth and level reinforced concrete slab.

The retaining walls will form the two main side walls of the pool. The side walls, as well as the slab, will have to be reinforced concrete and you will have to leave the anchor needles at the top. The supporting walls must have a height equal to the plate of the pool. To make the supporting walls are very indicated the quarried construction stones from the size of 24 cm.

To guarantee a good stability to the underground swimming pool, the stones of the wall must be laid alternately and reinforced with construction steel. For the preparation of reinforced concrete we invite you to read the article dedicated to the Malta DIY. The quarried stones, once laid, must be filled with thin concrete cement.

Once you have done the digging, you will only have to mount the basic profiles. The individual elements of the base profile will form an oval with the help of junction tubes. The basic profile that will be placed on the bottom of the excavation, will have to match the perimeter perfectly.