Once they are living in your attic squirrels will investigate to see what they can find and often crawl into the walls.
Squirrels in my walls and ceiling.
It is imperative for them to chew in order to grind down their constantly growing teeth.
Because squirrels enter through the roof line according to the new york times they almost always make themselves at home within the walls or ceiling of the attic.
Will squirrels chew through the ceiling or wall squirrels will chew through virtually anything they see.
Above all check every inch of the walls and ceiling for potential access holes.
Baby squirrels in my walls once baby squirrels are born in your walls they can be very problematic to deal with usually you have two options you can have a animal removal company come in and cut the wall to gain access to the nest site or you can wait the 6 to 8 weeks until the babies are fully able to climb from the wall cavaity.
The principles for how to get squirrels out of your walls or how to get squirrels out of your house anywhere from the soffits to the eaves or ceiling are the same as for the attic.
Find the entry points make sure the young are removed fix all secondary entry areas mount traps on the main hole repair damages.