wrote in message
ups.com...
| Is there a way to repel rats from inside your ceiling space? I have
| heard that possums dislike naphthalene and camphor. Is there anything
| that rats dislike? I am definitely not putting rat poison in the
| ceiling, so the little critters die in some hard-to-reach wall cavity,
| and then perfume the whole house.
|

trap them:

http://www.havahart.com/nuisance/cri...tters_rats.asp

often you can also borrow these traps from your local public works office.