Patio awnings are a beautiful addition to your patio or deck. They immediately offer shade and protection from the sun and rain so you can get more enjoyment from your patio. Now you can sit outside and have a summer meal and provide a shady place for the kids to play. Your patio will be up to 20 degrees cooler, especially with a light colored one that reflects the sunlight. It blocks 99.9 percent against harmful UV rays.