Window protection films are primarily designed for internal use. These films are used to protect windows from surface damage by spray painting, felt tip pen and other methods by which graffiti is written or scrawled. These can also prevent scratches and gouges from damaging windows. These films not only provide an effective clear protective barrier that is less costly to use than repairing or replacing the substrate, but also increase personal safety.
Window screens prevent wind from entering the room. These are expanses of metal or plastic mesh that is stretched on a wood, metal or plastic frame. It is designed to facilitate the flow of fresh air into home and keep mosquitoes out and also provides some security for an open window, restricts the entry of leaves, windblown debris and other insects. In seasonal climates, window screens are usually taken down in autumn and replaced by storm windows that provide extra insulation and protection from winter storms.