Solar Blankets, & Reels to Help Heat up your Swimming Pool Water

Yes, you can and usually should cut your solar cover to fit your pool, and cutting it does not void the warranty. Solar covers are sold in standard rectangular, round, and oval shapes, and most pools especially those with steps, benches, curves, or irregular shapes require trimming. Manufacturers expect this.

To cut your cover: first, lay it on the pool (bubble side down) and let it rest for a few hours to relax any folds or creases. Then trace the shape of your pool with a marker and use sharp scissors or a utility knife to trim. Start by cutting less than you think you need you can always remove more material, but you cannot add it back. For pools with steps or separate areas, many owners cut the cover into two or more sections for easier handling. Warranties cover manufacturing defects (such as delamination or bubbles separating from the base layer), not cuts made for sizing.

Bubbles always go DOWN, toward the water. This is the single most commonly asked question about solar pool covers, and the answer is consistent across every manufacturer and pool expert. The bubbles are air pockets that act like tiny greenhouses they absorb heat from the sun, trap it, and transfer it directly into the pool water through conduction. For that process to work, the bubbles must be in contact with the water.

If you install the cover upside down (bubbles facing up), two problems occur: (1) the heat gets trapped in the bubbles with nowhere to go, so your pool does not warm up, and (2) the bubbles can overheat and burst or peel away from the base layer, significantly shortening the life of your cover. Always smooth side up, bubble side down.

A solar pool cover typically lasts between 2 to 5 years, with 3 years being the average. Cheaper,thinner, covers may last only 1 to 2 seasons, while higher-quality, thicker, can last up to 5+ years with proper care.

• UV Expososure & Head - Intense sunshine and time in the sun breaks down the plastic over time
• Proper Chemical Balance - Chlorine and pH levels that are too high or too low accelerate deterioration.
• Cover Maintenance - Regularly cleaning the cover and storing it in the shade when not in use significantly extends its life.

Color affects how a solar cover performs, and the best choice depends on your goals:

• Clear covers Allow the most sunlight to pass through directly into the water, which means faster and greater heat gain. However, because they let more light through, they offer less protection from UV rays that break down pool chemicals. Best for maximizing temperature increase.
• Blue covers The most common color. They absorb and trap heat from sunlight while also blocking some UV rays, which helps protect your pool chemicals from degrading as quickly. A good balance between heating and chemical protection.
• Silver / Space Age covers Reflect heat back into the pool rather than allowing as much new heat in. These are the best at retaining heat already in the water and are ideal for cooler climates or for overnight use, but they may not heat the pool as dramatically as clear covers on a sunny day.

For most homeowners, a blue cover offers the best all-around performance. If your primary goal is maximum heating and your pool water chemistry is well-maintained, a clear cover may give you better results.