INSTALL AN INSIDE MOUNTED BOARD

1. Cut 1 x 1 mounting board 1/2" shorter than inside measurement of window frame. This ensures that mounting board will fit inside the frame after it is covered with fabric.
2. Cover mounting board. From the bottom of board, predrill screw holes through board and into window frame, using 1/8" drill bit; drill holes 3/4" from each end of board and in center for a wide window treatments.
3. Staple window treatment to mounting board. Secure board, using 8 X 1 1/2" pan head screws.

INSTALL AN OUTSIDE MOUNTED BOARD

1. Cut mounting board 2" longer than width of undertreatment or window frame. If the outside-mounted window treatment is used alone, a 1 x 2 mounting board may be used. If the outside-mounted treatment is used over an undertreatment, the mounting board should be at least 2" wider than the projection of the undertreatment.
2. Cover board. Mark screw holes for angle irons on bottom of board and at 45" intervals or less. Predrill screw holes into board; size of drill bit depends on screw size required for angle iron. Screw angle irons onto board.
3. Hold board at desired placement, making sure it is level; mark screw holes on wall or window frame.
4. Remove angle irons from board. Secure angle irons to wall, using molly bolts or 3/4" pan-head screws.
5. Staple window treatment to the mounting board. Place mounting board on installed angle irons. Screw angle irons onto board.