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

https://marcosgnc317.clearhavendigest.com/posts/what-proper-attic-decontamination-involves-after-a-rodent-infestation-2

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.