Rodent exclusion, exterior wall open
I live in a condo that is a duplex. I share a common wall with my Nextdoor neighbor. Several years ago they had an old telephone line access box on the exterior wall of their house that was not sealed off and rats got into the walls of our condos. That issue resolved when the box was removed and the wall sealed. Now they are having water damage from a window leak worked on and the exterior walls are opened up. This has me worried that rats will get into the walls again, especially because construction has been paused for 2 weeks while they deal with getting a structural engineer consultation per the city’s requirement.
Is there anything that can be done to keep rats from entering the walls from the outside? Is there something that contractors use for this?