Properly installed soffit serves a purpose that is both aesthetic and functional. It gives your roof a finished look, but more importantly, it is an integral part of your roof's ventilation system. The ventilation from your roof vents will not function properly without the ability for air to flow into your attic through the venting that soffit provides. At the same time, it protects your eaves and attic from intruding pests, such as insects, rodents and birds. New soffit and fascia can be a great way to increase the curb appeal on your home.