4-6 feet flex can be stuck to the wall using double side tape.
Larger backdrops are ideally stuck to a metal or wooden frame built to the exact size. Local wedding decorators will help out with the frame for these.
Alternately we can provide rivets (metal encased holes) which can be used to tie the backdrop from nails or the ceiling or tied to a curtain rod. The rivets are similar to holes seen in curtains available commercially.