There are essentially two covering systems for a swimming pool: the sheet and the cover with shutters. The sheet used to cover the pool must be made of a rather resistant plastic material. Often, especially for above ground pools, its placement on the structure can be rather uncomfortable and complicated, which must be done in such a way as to prevent rainwater from filtering through it. The towel is used both at the end of the day of use of the pool and when the pool must be covered for the winter period. However, distinctions must be made between the various types of cloth. In fact, it is also possible to purchase the thermal roof for daily coverage. It is a sheet capable of trapping the heat accumulated by the water during the day and avoiding its dispersion during the night, so that the next day the water remains lukewarm.

When the pool is not prefabricated, but needs to be built, it is advisable to equip it with submerged roller shutter covers. The material is treated in such a way as to be resistant to chlorine and that it does not get stained, the operation is automatic and is operated by means of a motor, the slats slide in such a way as to cover the entire tank starting from one edge. The same operation involves the rewinding of the shutter, which thus seems to disappear into thin air. It is a widely used system, because it makes the appearance of the pool more pleasant during the winter period. In addition, there is also an emergency system that allows you to manually activate the cover. If the pool is already built, an external roller shutter can be installed. The winding takes place on the edge of the pool, and also in this case everything is activated by means of a remote control. Those who have a pool already built can decide at any time to install this system, considered one of the most practical and comfortable. Furthermore, it is an indestructible system because it is designed in such a way as to guarantee unlimited use.

The towel used for the winter period, on the other hand, must be a rather thick one, fixed correctly, to prevent small animals from settling in the pool. Covering with a tarp for a rather small outdoor pool proves to be a fairly convenient method. The same cannot be said for larger pools. In this case it is preferable to avoid buying the sheets that are not specific, because you only risk making an unnecessary expense. At the point of sale where you buy the pool you can also buy the cover, obviously of the same shape and size as the pool. The tarpaulin cover also applies to in-ground pools, for which the winter cover is made of special material: light, floating, waterproof and resistant to frost. The system is fixed by means of an anchor on the sides of the pool, so that the closure is total. The color is green-black to prevent the sun’s rays from filtering. When we refer to an isothermal cover, we speak of a structure welded in such a way that it does not come off. The opening of this sheet takes place mechanically, especially for large pools where it would be unthinkable to be able to do otherwise. It is important to emphasize that the techniques described so far make all anchoring components completely invisible. This means that the swimming pool, during the winter, must be perfectly covered by a large sheet, which leaves no opening even for the sun’s rays.

Another form of cover is the telescopic one, which consists in creating an aluminum and glass structure with sliding doors around the pool. In this way the swimming pool is completely inserted in the garden during the summer period, while it remains covered during the winter period. For large pools, it is advisable to make the opening and closing of this system automatic. The heat accumulated during the day is difficult to disperse and this allows for a constant water temperature. Furthermore, if the pool and the environment have a heating system, it will be possible to use the structure even during the winter period. The telescopic cover is able to adapt to any size and model of swimming pool, therefore, unlike the sheets which are made in the standard version, this structure also offers the possibility of creating swimming pools with an unusual shape. The more extensive the coverage structure, the higher the cost to be incurred. In addition, there must be enough space between the edge of the pool and the structure to allow passage. This space must be tiled or covered with specific outdoor materials, which should not heat up too easily during the summer.