Many sheet metal manufacturers produce aluminum trim coil that you can install on your house to cover base materials to provide a finishing feature. Typical uses include the trim for windows, soffit boarding, siding and roof edging. Aluminum trim coil comes in a large range of colors, widths and gauge thicknesses to complement your trim design needs. Knowing how to install the trim allows you to create a professional finish that is durable and cost-effective over the long term.