I had the noisy rodent issue in the roof and identified it as Pine Marten
Tried most things and then the old lady of the hamlet told me that Pone Martens are repulsed by the smell of camphor and they used to use moth balls as a deterrent in years past.
I could not source camphor or camphor-based moth balls locally so I bought the from the UK.
I placed 1 at each likely entry point and 2 in the small roof space and honestly, the Pine Martens were gone in 24 hours and haven’t returned since.
I then tried these at home in the UK and Grey Squirrels also do not like camphor , I am wondering about Loire