The best permanent rodent exclusion materials for San Diego homes include sheet metal, galvanized hardware cloth

https://zaneooed824.lakeviewbrief.com/posts/what-proper-attic-decontamination-involves-after-a-rodent-infestation

The best permanent rodent exclusion materials for San Diego homes include sheet metal, galvanized hardware cloth, copper mesh, stainless steel mesh or wool, cement, and caulk for sealing gnaw-prone gaps.