I love this idea. I want to use them for interior windows. Attach them to inexpensive dowels sold in hardware stores like Home Depot, and even Wal-Mart has them in a well stocked hardware dept. Use DOWEL of desired thickness that would fit neatly in a curtain rod holder. I bought a bag of holders from Dollar Tree that are a kind of aluminum industrial utility holder that come several in a bag for a buck. Saves on cost of expensive rod holders . Measure before attaching the holders to the wall. Attach the holders with screws. Staple or hot glue one edge of the mat to the dowel and hang it in the holders. The mat can have corded twine to roll up and tie when not using for privacy. Or get some seam binding braid or ribbon from a sewing notions dept. in a pretty color to tie the mat shades. Also can decorate the mats with craft paint and a stencil pattern of tropical leaves or flowers or other design that can be found in Walmart craft section. Thank you for your brilliant idea that gave me more ideas to do the same affordable project.