Soffit covers the underside of overhangs and porches (for example, it is the "ceiling" of a porch). Steel-Kits offers optional soffit packages for all of our home models. To allow proper air circulation, we supply special "hidden vent" soffit panels that conceal the perforations in the seams (except in California, which prohibits vented soffit). If your home order does not include siding, you may choose either aluminum or vinyl soffit. However, when you purchase both siding and soffit, we must restrict your choice of soffit material because of the freight cost and difficulty in coordinating deliveries. With steel siding, we will supply aluminum soffit. Our aluminum soffit panels are made from .019 mil-thickness 3105-grade aluminum alloy (H18 hardness) with a baked-on acrylic finish. If you purchase our Polar Wall Plus insulated vinyl siding, we will supply you with vinyl soffit. Our vinyl soffit panels are made from .048 mil thickness PVC with a low-gloss finish. Both our aluminum and vinyl soffits carry a lifetime manufacturer's warranty.