CertainTeed true texture technology mimics real rough cedar finish without the expense or heavy maintenance of real cedar siding. The vinyl siding can be used in new or remodeling family homes, multi-housing projects, or light commercial developments. CertainTeed monogram has the natural look of real painted or stained cedar shingles that are inspired by nature and are designed to blend with your home with the surrounding environment. Clapboard siding panels are long, narrow boards or panels that are nailed horizontally across the house. The term clapboard, lap siding, and horizontal siding can be used interchangeably. Clapboard tends to be flat, with no shadow line showing, and is the most common type of vinyl siding. Dutchlap style of siding has a very distinct shadow line that runs along the top edge of each board or panel. The top edge is shaped to create that hand-carved look and resembles the look of boards that have been beveled on the top half at a 45-degree angle. The lower half hangs at a 90-degree angle.