Sealing your eaves is key to a rat-free attic because roof-line gaps

https://milomrtg511.birchreport.com/posts/the-link-between-crawl-space-rodents-and-the-air-inside-your-home-4

Sealing your eaves is key to a rat-free attic because roof-line gaps and attic vent openings should be screened with corrosion-proof mesh and properly sealed to block access.