Give your cat a special place to perch – on the wall! Measure your wall if needed and cut a piece of laminated particleboard to the size needed for each perch. Cut a piece of outdoor carpeting to the size of each board and glue the carpet pieces onto the top of each shelf. drill a shelf bracket onto the bottom of each board and drill the cat perches onto the wall at staggered heights to create a staircase on the wall.
Source: Foxflat’s Blog