The answer to 'what is soffit' is the underside of the roof overhang that extends past the exterior walls of a home. Soffits are an important part of a home's roofing system, providing ventilation and protecting the roof structure from the elements. Soffits are typically made of wood, vinyl, or aluminum and come in a variety of styles and colors to match the home's exterior.
Soffits serve several key functions, including allowing air to circulate under the roof and preventing pests and moisture from entering the home. They also help to create an attractive, finished look to the roofline and can enhance the overall curb appeal of a home.