Bottom Receiver Position the top edge of a J-channel or vertical base along the previously snapped chalkline. Remember to drill minimum 1/8" diameter weep holes no more than 24" apart. Fasten every 8" to 12". Use the center of the nail slots. All vinyl should be fastened securely but not tightly. Sideways movement should not be restricted. Leave 1/4" gaps at the corner posts. Where lengths adjoin, trim the nailing flange 1" and overlap 1/2" to produce a neat joint. Window, Door, and Roof Trim Install J-channel at the tops of the sidewalls. At the gable ends, snap a level chalkline along the base of the gable and install J-channel. Overlap where necessary and allow for expansion. After installing flashing, trim around all windows and doors using J-channel. The following sequence is suggested: Cut a J-channel for the bottom of the window, as wide as the frame, and install it. Cut side J-channels the length of the frame plus the width of the top and bottom J-channel. Cut and bend tabs into the bottom channel. Install the side channels. Cut the top J-channel the width of the frame PLUS the width of the side J-channels. Notch the top J-channel on each end, bend the tabs into the side J-channel, and fasten the top J-channel. A miter cut and tab can be provided at the bottom of the window depending on the sill's condition. Sidewalls Starter Strip Create a vertical starter strip by cutting the nailing hem and adjacent lock off