Cut vinyl siding quickly and efficiently using hand tools such as a utility knife, tin snips or aviation snips. The choice of tool depends on whether you are cutting the siding lengthwise, across its width or dealing with trim pieces.Continue Reading
Make a mark on the piece of siding using a piece of chalk to ensure that the cut is done in the proper location. For marking a line across the width of the siding or a piece of trim, place a straightedge across the piece of siding, and draw the chalk across the width of the siding along the edge of it. For horizontal cut lines, use a chalk string to make the mark along the length of the siding.
Use a pair of large-bladed tin snips to cut along the width of the siding piece. Cut along the chalk line to ensure that the line is a straight one. For cutting the length down on a piece of trim, use aviation snips to cut along the drawn cut line.
Cut the siding lengthwise by scoring the siding along the cut line with a utility knife. Bend the siding back and forth along the cut line to snap it at the scored cut.