Versatex Trimboard’s WP4 PVC tongue-and-groove profile features a V-groove center match, the 3/4- by 5 7/16-in. profile meets the needs of builders and architects seeking a durable, workable replacement for the conventional pine WP4. The WP4’s versatility has made it the traditional solution for wainscoting, soffits and porch ceilings. Applications include interior and exterior paneling, fencing, porch skirting, hot tub enclosures and shed doors. WP4 is sold in 18-ft. lengths. Installation requires ordinary carpentry skills, tools and fasteners. It is impervious to moisture and insect damage.