Spending time outdoors supports health and well-being, but too much sun exposure can be harmful. UV ray is an electromagnetic energy from the sun, classified into three types: UVA, UVB, and UVC. A patio cover provides a simple, effective way to reduce this risk by blocking or filtering harmful UV radiation.
Understanding UV Radiation
UV radiation consist of three main types: UVA, UVB, and UVC. UVC rays are the most dangerous, but they’re almost entirely absorbed by the Earth’s atmosphere. UVA and UVB rays, however, reach the surface and pose health risks. UVA rays penetrate into the skin that cause aging and long-term damage, while UVB rays target the outer layer and are the main cause of sunburn. Both increase the risk of skin cancer.
How Shade Helps
Shade doesn’t eliminate UV exposure, but it significantly reduces it. When you sit under a patio cover, the material acts as a barrier, absorbing or reflecting a large portion of UV radiation before it reaches your skin. The effectiveness depends on the type of material, its thickness, color, and UV rating.
Materials That Block UV Rays
Not all patio covers offer the same level of UV protection. Some materials are better at blocking harmful rays than others. Here are common options:
- Polycarbonate panels: These are durable and offer excellent UV protection. Many polycarbonate sheets feature a UV-resistant coating that blocks harmful UV rays.
- Acrylic fabrics: Often used in retractable awnings, these fabrics are tightly woven and sometimes treated with UV inhibitors to protect against sun damage. They can block as much as 90% of UV radiation.
- Canvas and other woven fabrics: These can be effective if they are tightly woven and treated with UV-blocking chemicals. Lighter colors reflect more sunlight, while darker ones absorb it.
- Wood and metal: Solid materials like wood slats or aluminum panels block sunlight entirely in the areas they cover, though their design may allow light to pass through gaps.
Design Considerations for UV Protection
The design of your patio cover also influences UV protection. A cover that provides broad, consistent shade throughout the day offers better protection than one that only casts partial or shifting shade. Angle, orientation, and coverage area all matter. Even in the shade, some exposure can occur due to reflected UV radiation. This is why choosing materials with high UV-blocking properties is key.
UV Ratings and What They Mean
Many patio cover materials come with a UPF (Ultraviolet Protection Factor) rating. These indicate how much UV radiation a fabric allows to reach your skin:
- UPF 15-24: Good protection
- UPF 25-39: Very good protection
- UPF 40-50+: Excellent protection
A material with a UPF of 50 allows only 1/50th of the sun’s UV rays to pass through. Always check for this rating when selecting materials, especially for fabric covers.
Beyond the Cover: Additional Protection Tips
While a patio cover significantly reduces UV exposure, it’s smart to take extra steps:
- Wear sunscreen with a high SPF.
- Use protective clothing, hats, and sunglasses.
- Drink lots of water and limit direct sun exposure when UV rays are strongest.
Conclusion
Patio covers provide valuable protection from harmful UV rays. Understanding how materials and designs impact UV shielding helps you make informed choices for safer outdoor living. The right cover is a smart step toward healthier time spent outside.