Series 20 Description: Open joint reveal rainscreen system (1/2" wide x 1" deep joint reveal, no silicone). This system has a full perimeter extrusion frame in each panel and utilizes shared clips to the wall structure. It is a progressive install which means that panels can not be removed or replaced randomly after install. Since the system is a ventilated rainscreen system, it does require a full weatherproof underlayment, properly flashed and sealed. When completed, the system is very clean and attractive.