Measure the width of the bed frame. Measure the length from the top of the bed frame up to the desired height of the headboard. Purchase a piece of ½-inch plywood cut to these measurements. Retailers such as Home Depot will cut the piece to your specifications.
Cut two pieces of batting that are 6 inches larger than the plywood dimensions on all sides. Layer the two pieces, spread the batting over the plywood and stretch it taut around the edges. Staple the batting onto the plywood on the back at intervals of 6 inches. Add more batting if desired for a plusher headboard, although two pieces will be very plush. Spread the fabric over the batting and fold it around the edges as well. Staple the fabric onto the plywood at the same 6-inch intervals.
Place the headboard on a clean, flat surface with the front facing up. Create a grid pattern on the headboard for the embellishments by measuring and marking points on the fabric beginning 6 inches down from the top left corner. Space the points evenly for a uniform effect. Headboards are commonly embellished with rows of buttons to emphasize the softness of the cushioning. Staple these spots to compress the fabric and batting in the same manner as actual button tufting. Glue small embellishments such as buttons or small beads in the tufted spots to cover up the staples.
Apply the double-sided adhesive hangers to the back of the headboard along the edges and middle. Line the headboard up with the wall behind the bed with the mattress pushed slightly away from the wall. Press the headboard firmly against the wall to secure it in place as per the instructions on the adhesive packaging. Press lightly on the headboard from the top, bottom and sides to ensure it is secure and then push the mattress back into place against the new headboard.