Located beneath the eave on the exterior of your home, soffit is what seals the space beneath the edges of your home's roof. It is also used to improve ventilation of the attic by drawing away moisture and heat through small holes that are part of your soffit system. Attic ventilation is extremely important because when heat and moisture become trapped, it often leads to rotting in your rafters and sheathing. These damaging issues also affect your fascia, which is what home builders use to create a barrier in between the edge of the roof and the outside elements. Your soffit and fascia can additionally fall victim to insect infestations and bird nesting issues. Soffit is widely available in vinyl, aluminum, fiber cement and is available in many different colors. Fascia can be manufactured with fiber-cement board, cedar, and aluminum.