-- Cut a 1-x-6-inch board a few inches wider than the bank of windows and cut two 6-inch-long pieces for the returns. Screw the returns to the board.
-- Cut fabric to a height of 10 inches and to the desired width (leaving allowances for hems, the returns, and at least 8 inches for each box pleat) and hem all edges using fusible webbing.
-- Position the board under the fabric, 3 inches from the top hem. Staple the fabric to the board, folding in pleats every 12 to…