Insect screens are products that prevent insects from entering into a space. They are usually mounted on a window or door opening and their design blocks insects with a certain size from entering. The products are often referred to as screen doors. Nets or guaze elements are usually used for the screen's material and design. It's important that the installtion does not have any holes before it's mounted to the opening intended to be protected. The major advantage for users is that the windows and doors can remain open, when normally insects would otherwise be flying in through the opening. The grid can be adhered or screwed in.