What Is a Pool Cover Used For?

Pools lose heat more quietly than most people realize. You may not notice much during the afternoon, then come back the next morning and find the water noticeably less comfortable.

A cover helps slow that heat loss. It won’t warm the water on its own, but it does help the pool hold onto heat for longer. That becomes even more important if the pool uses a heater or heat pump. Without a cover, part of that energy ends up going toward replacing heat the pool simply lost overnight.

For heated pools, this is often the benefit that changes people’s habits. Once they see how much more stable the water feels from one day to the next, using the cover starts to feel a lot less optional.

The process of evaporation might seem trivial until water has to be replenished in the pool regularly.

An uncovered pool will constantly lose water, which happens gradually and may not be noticed until one starts adding the water again week after week. The warmer the weather, the quicker the process. The drier the air, the better the conditions. The wind increases evaporation.

All these factors make the amount of lost water much higher than expected in many backyard pools, especially during the warm season.

By covering the pool, all those conditions are minimized, and evaporation happens slower since the water comes into contact with moving air and the sun less often.

This tends to show up most clearly in outdoor pools that sit unused for a few days at a time. When the water stays open around the clock, those losses add up quickly.

This is still the most obvious day-to-day benefit, especially if your pool sits near trees or catches a lot of wind.

An uncovered pool collects everything. Leaves drift in, pollen settles, insects end up on the surface, and fine dust has a way of appearing even when the yard looks clean. A cover won’t block every bit of that, but it reduces the mess enough that maintenance feels much less constant.

That usually means less skimming, less vacuuming, and less strain on the filtration system. It also means fewer organic materials breaking down in the water, which can make pool chemistry easier to stay on top of. No one gets a maintenance-free pool out of it, of course, but many owners end up with a pool that is much less frustrating to keep clean.

And honestly, that alone is reason enough for some people.

It should be noted that not all swimming pool covers seek to achieve the same goals, which may cause confusion in their classification.

Solar covers are predominantly intended to solve the tasks related to heat retention and evaporation regulation. They are typical for pools which are intensively used during the swimming season when the owner desires to retain some warmth and decrease the losses of water.

On the other hand, safety covers serve the different purpose. They are used for providing additional protection while the pool is closed. This type of cover is usually preferred by people who consider the safety aspect as very important.

If you need a cover which will protect your pool in the offseason period, then you should choose a winter cover. This type of cover will be intended to protect the pool from the effects of external environment.

Finally, there are automatic covers which are usually less functional in comparison with others. However, they are widely spread due to the fact that they are easy to use.