If your house faces east or west, you may find yourself squinting into the sun in the mornings or evenings if you do not have a roller valance for awnings. Awnings with a roller valance provide an additional level of protection against sun, wind and blowing rain by adding a vertical piece that can be easily retracted. Plus, a roller valance can extend far down the side of your patio or deck, creating a partially screened-in outdoor living space.