Your pool enclosure helps exclude intruders, animals, and even some leaf litter from making its way into your pool. It's important to keep the enclosure in good condition for optimum safety. Types of Damage Damages happen to either the screening or the frame. Metal screens can rust, become ripped, or develop bends and dents. Nylon screening is most prone to ripping and holes. Even small damages can render the screen useless when it comes to keeping animals and pests out of the pool area.