Eave closures serve a specific function in roofing systems that is primarily focused on maintaining the integrity of the building. Their primary role is to prevent animals, such as birds or rodents, from nesting or entering the space beneath the roofline. By sealing the eaves, these closures effectively block potential access points, which can help avoid issues related to damage from animal activity or infestations.
While drainage efficiency, insulation, and support for roofing materials are important aspects of roofing systems, they are not the primary role of eave closures. Proper drainage is typically managed through a combination of roofing design elements and materials that direct water away from vulnerable areas. Insulation is achieved through insulation materials placed within the roofing assembly, not through closures. Similarly, while closures might provide some structural support, they do not specifically function to hold additional roofing materials as their main purpose. Eave closures are thus essential for pest control and maintaining a healthy roof system.