PVC, solar or transparent polycarbonate: how to choose the right slat

The slat material is one of the most important decisions when choosing an automatic cover for your pool, because it directly affects how long the cover lasts, how well it warms the water and how it looks. At Ingerclima we manufacture covers with three types of slat: PVC, solar polycarbonate and transparent polycarbonate. Here are the differences, so that you can choose the one that best suits your pool.

PVC slats: strength and a wide choice of colours

PVC slats are the most widely used in automatic covers thanks to their excellent balance of strength, light weight and price. They are filled with high-density polyurethane foam, which keeps them floating even if one of the cells is punctured, and they offer good thermal insulation that helps to hold the water temperature.

• High resistance to UV rays and to pool chemicals, with no loss of colour or stiffness over time.
• A wide range of colours (blue, grey, beige, white…) to match the surroundings of your pool.
• Good thermal insulation, although they do not transmit light, so they provide no direct solar heating to the water.
• It is the most balanced option for anyone looking for durability, safety and good looks with no need for solar gain.

Solar polycarbonate slats: make the most of the sun's heat

Solar polycarbonate combines the strength of a rigid material with the ability to let part of the solar radiation through, warming the water naturally while the pool stays closed. It is the option preferred by owners who want to extend the swimming season without driving up the cost of heating the water.

• A controlled greenhouse effect: solar radiation passes through the slat and warms the water, and can raise the temperature by several degrees on sunny days.
• Greater impact resistance than PVC, thanks to the inherent stiffness of polycarbonate.
• Available in several shades (blue, grey, green, silver…), which regulate how much light and heat reach the water.
• If you also want to maximise your energy savings, you can combine it with a heat pump, as we explain in our article on covers and pool heating.

Transparent polycarbonate slats: maximum brightness

Transparent slats are the option that lets through the most light and solar heat, as they barely filter the radiation at all. They are ideal for anyone who puts the look of the pool first and wants the water to be visible at all times, even with the cover closed, as well as making the most of natural heating.

• Maximum light transmission, which keeps the pool visible and bright with the cover on.
• More solar heat gain than any of the other materials, which is particularly useful in areas with fewer hours of direct sun.
• Finishes available in clear, opal or platinum, depending on the degree of transparency you want.
• They need a little more cleaning to keep them looking their best, since limescale marks and dirt show up more than they do on coloured slats.

Quick comparison: which one should you choose?

If you are after the most versatile, most affordable solution and solar gain does not matter to you, PVC slats are your best option. If you want to cut your heating costs by using the sun, solar polycarbonate slats are the most balanced choice. And if what you value most is the look and the brightness of your pool, transparent slats are the ones that make the difference.

Whichever you choose, the three materials we manufacture are all made in conformity with the safety standards for automatic covers, taking the weight of a person without sinking, as we explain in our article on safety regulations.

Which material is most in demand in each area

All three materials work anywhere in Spain, but demand is clearly divided. In the villas of Marbella and the Costa del Sol, where the pool is part of the design of the house, there is strong demand for transparent polycarbonate, which all but disappears over the water; and right along the coastal strip we fit profiles and fittings rated for a marine environment, because salt air attacks the mechanism long before it attacks the slat.

In Madrid and Toledo PVC dominates, for its toughness and value for money, and solar polycarbonate is gaining ground among owners who want to pick up a few degrees and stretch a season that, with no help, lasts barely three months.

In Seville and inland Andalusia the deciding factor is a different one: sun exposure. With long, very intense summers, what owners look for is a slat that will take years of radiation without losing its colour or turning brittle, and UV-treated PVC handles that comfortably. On the Málaga coast, by contrast, what settles the choice is salt air on the fittings, not the slat.

Conclusion

There is no "best" material in absolute terms: the choice depends on your priority, whether that is savings, looks or solar gain. At Ingerclima we can advise you with real samples of each material and help you choose the colour and the finish that works best with your pool and your garden.