DIY Upholstered Wall Hangings. I wanted something oversized to cover the wall, but that didn't cost a fortune. I ended up covering three 4'x8' pink foam insulation boards from Home Depot in a large repeat, silk, damask fabric, which ended up being much less than any art I would have found in that size. I just stretched the fabric around each board and staple gunned it to the back. You could also use spray glue for this application.