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

https://landenmuog401.theburnward.com/common-entry-points-rodents-use-to-get-under-san-diego-homes-1

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.