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One of the lowest cost covers made specifically for swimming pools is the bubble (or solar) cover.
Bubble covers are similar to bubble packing material except they use a thicker grade of plastic
and have UV inhibitors.
Vinyl covers consist of a heavier material and have a longer life expectancy than bubble covers.
Insulated vinyl covers are also available with a thin layer of flexible insulation sandwiched
between two layers of vinyl.
Outdoor pools gain heat from the sun, absorbing 75%85% of the solar energy striking the pool
surface. This is an important contribution to the pool's heating needs. A pool cover will decrease
the solar gain contribution to some extent, depending on what type you use. A transparent bubble
cover may reduce pool solar energy absorption by 5%15%. A completely opaque cover will
reduce it by 20%40%. You need to consider this when selecting a pool cover.
You also need to decide whether you want a manual, semi-automatic, or an automatic pool cover.
You can manually pull the cover on and off, fold it, and place it somewhere out of the way. You
can also purchase a pool cover reel to help manually roll up the pool cover. The reel, usually on
wheels, can be rolled out of the way.
Semi-automatic covers use a motor-driven reel system. They use electrical power to roll and
unroll the cover, but usually require someone to pull on the cover when unrolling, or guide the
cover onto the reel when rolling up the cover. Semi-automatic covers can be built into the pool
deck surrounding the pool, or can use reels on carts.
Automatic covers have permanently mounted reels that automatically cover and uncover the pool
at the push of a button. They're the most expensive option, but they're also the most convenient.
Some pool covers fit into tracks along the sides of the pool. This prevents anything or anybody
from getting into the pool. They even support the weight of several people. If liability is a concern,
these are a good option to explore. They can be run manually, semi-automatically, or
automatically. Safety covers are recommended for public pools, and may be required by
inspectors.
HOW TO USE A POOL COVER
Pool covers should be used during your swimming season. If you use your pool during the
daytime, take off the cover just before swimming and replace the cover as soon as you're done
using the pool.
If you use your pool only at night, the effectiveness of a pool cover will depend on whether the
evaporation and other losses prevented by the cover exceed the solar gain reduction caused by