3" No Gap Panel - Rainscreen 3" Standard Panel - Rainscreen 5" No Gap Panel - Rainscreen 5" Standard Panel - Rainscreen 5" Tongue & Groove with Quirk Eased Edges Rainscreen Corner Trim Grad Clip Rainscreen Window/Door Trim Grad Clip Corner Trim The Grad System Installation Detail Start Rail 5.5" - 13 Boards Start Rail 5" - 15 Boards Grad Clip Decking Start Rail 3.5" Repeat 3.75"