like sed above you could just cut out card board the same length as your walls and staple it to that and prop them against the walls. personally i get small pieces of card board maybe a 1/2 inch by 1/2 inch and have a buddy hold the mylar film and staple the cardboard to the mylar to the wall.
or there always 3M double sided tape.
disrupt86 Reviewed by disrupt86 on . best way to hang mylar? closet white walls, rather not use thumb tacs like to keep it neat to store and reuse ^ ^ ! ! ! ! ! ! Rating: 5