Solar Pool Covers for Inground Pools: Sizing, Thickness, and Real-World Use

A solar pool cover floats on the water surface, trapping sunlight to warm the pool and reducing evaporation and heat loss overnight. For an inground pool, the right cover is sized to your pool’s shape, made with enough thickness to last, and easy to handle. Measure carefully, then choose by thickness, color, and whether you want a reel for storage.

What a Solar Cover Does and Does Not Do

These covers are made of air-filled bubble material that sits on the water. They let sunlight through to warm the pool, and they act as a barrier that slows evaporation and heat escape. Because evaporation carries away heat, water, and chemicals, a cover can reduce heating costs and chemical loss. Results depend on climate, sun exposure, and how consistently you use it.

It is important to understand that a solar cover is not a safety cover. It will not support the weight of a person or pet, and it should never be relied on to prevent drowning. Treat it as an energy-saving accessory and follow local pool safety requirements, including fencing and barriers.

Measure Your Pool Correctly

Pool shapes include rectangles, ovals, kidneys, and freeform designs. Measure the longest length and widest width, then check the manufacturer’s sizing guide. Rectangular covers can be trimmed to fit, and many come in standard sizes meant to be cut. For irregular pools, you may need to trace a template. Cutting slightly smaller than the pool leaves a small gap so the cover floats freely, which helps prevent wrinkles and buckling.

• Measure length and width at the widest points.
• Check for steps, benches, and corners that affect the shape.
• Buy slightly larger and trim to fit, if the product allows.

Thickness and Color Options

Thickness, measured in mils, is a rough indicator of durability. Thicker covers generally last longer but weigh more, which can make removal harder. You can browse solar pool covers for inground pools to compare sizes and thicknesses.

Handling, Storage, and Reels

A solar cover can be heavy and awkward when wet, so think about how you will remove it each day. A reel system makes it easier to roll up and store the cover without dragging it across the deck. Reels vary in price and size, so check that the one you choose fits your pool width. Without a reel, many owners fold the cover over a clean surface, but this can cause creases and wear.

Store the cover in a shaded spot, since extended sun exposure while out of the pool can degrade it. Rinse it off before storage and let it dry to avoid mildew. A solar pool cover reel is a worthwhile add-on for larger pools.

Water Chemistry and Care

High chlorine levels can shorten a cover’s life, especially if you shock the pool with the cover on. Remove the cover before adding shock treatments, and keep chemicals balanced according to your pool maintenance guidelines. Wipe off debris and rinse the cover occasionally. Check for tears or heavy discoloration, which signal the end of its useful life.

Also, keep the bubble side down toward the water, as most manufacturers recommend. Following the maker’s instructions on orientation and chemical exposure gives you the best chance at a long service life.

Safety and Seasonal Tips

Never swim with a solar cover in place, and remove it completely before anyone enters the pool. Keep children and pets away from covered pools. In windy areas, consider tie-downs or weights designed for the purpose. At the end of the season, clean and dry the cover thoroughly, fold it loosely, and store it away from heat sources and sharp objects.

Decide on your goal. If you want a few extra degrees of warmth in spring, a basic cover could be enough. If you want to cut evaporation year-round, invest in a thicker one and a reel so you will use it consistently.

Consider how much work you are willing to do each day. A cover that is perfectly sized but too heavy to handle alone will end up left off, which wastes its benefit. If you have a large pool or limited mobility, a reel and a lighter cover may make a bigger difference than extra thickness. Two people can also handle a big cover more easily, particularly when it is wet and heavy.

Weather plays a role as well. In cool, cloudy regions, the heat gained from sun is smaller, but retaining heat overnight may still pay off. In hot climates, covers reduce evaporation but can contribute to overheating if left on constantly, so check water temperature and adjust. Wind can lift an unsecured cover, causing it to bunch up or blow off, which is why some owners trim a small gap and use designated anchors.

Finally, compare warranty terms, which often prorate coverage over several years. They show how confident the maker is in the product, though sun and chemicals typically void coverage if misused.

Solar Pool Cover FAQ

How much will it warm my pool?

Results vary with climate, sun, and wind. Manufacturers often claim a range of warming, but real-world results depend on your setup.

Should the cover stay on all the time?

Many owners leave it on when the pool is not in use and remove it for swimming. Constant coverage may affect chemistry and algae, so check guidance.

How long do they last?

Lifespan depends on thickness, sun exposure, chemicals, and handling. Replace the cover when it becomes brittle or torn.